2018 in paleomalacology

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This list, 2018 in paleo malacology, is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that were described during the year 2018, as well as other significant discoveries and events related to molluscan paleontology that occurred in the year 2018.

General research

A study on the impact of the Paleocene–Eocene Thermal Maximum on the richness, turnover, or ecological structure of shallow marine molluscan faunas from the Gulf Coastal Plain, or on the body size, growth rate, or life span of component taxa, is published by Ivany et al. (2018).{{Cite journal|author1=Linda C. Ivany |author2=Carlie Pietsch |author3=John C. Handley |author4=Rowan Lockwood |author5=Warren D. Allmon |author6=Jocelyn A. Sessa |year=2018 |title=Little lasting impact of the Paleocene-Eocene Thermal Maximum on shallow marine molluscan faunas |journal=Science Advances |volume=4 |issue=9 |pages=eaat5528 |doi=10.1126/sciadv.aat5528 |pmid=30191179 |pmc=6124918 |bibcode=2018SciA....4.5528I }}
A study on the basal metabolic rate of Pliocene to recent bivalves and gastropods from the Western Atlantic is published by Strotz et al. (2018).{{Cite journal|author1=Luke C. Strotz |author2=Erin E. Saupe |author3=Julien Kimmig |author4=Bruce S. Lieberman |year=2018 |title=Metabolic rates, climate and macroevolution: a case study using Neogene molluscs |journal=Proceedings of the Royal Society B: Biological Sciences |volume=285 |issue=1885 |pages=20181292 |doi=10.1098/rspb.2018.1292 |pmid=30135165 |pmc=6125889 }}
A study evaluating how faithfully stratigraphic ranges of extant Adriatic molluscs are recorded in a series of cores drilled through alluvial, coastal and shallow-marine strata of the Po Plain (Italy) is published by Nawrot et al. (2018), who also evaluate the implications of their study for interpretations of the timing, duration and ecological selectivity of mass extinction events in general.{{Cite journal|author1=Rafał Nawrot |author2=Daniele Scarponi |author3=Michele Azzarone |author4=Troy A. Dexter |author5=Kristopher M. Kusnerik |author6=Jacalyn M. Wittmer |author7=Alessandro Amorosi |author8=Michał Kowalewski |year=2018 |title=Stratigraphic signatures of mass extinctions: ecological and sedimentary determinants |journal=Proceedings of the Royal Society B: Biological Sciences |volume=285 |issue=1886 |pages=20181191 |doi=10.1098/rspb.2018.1191 |pmid=30209225 |pmc=6158527 }}

Ammonites

=Research=

A study on the life history and habits of ammonites as indicated by measurements of their conchs is published by Walton & Korn (2018).{{Cite journal|author1=Sonny A. Walton |author2=Dieter Korn |year=2018 |title=An ecomorphospace for the Ammonoidea |journal=Paleobiology |volume=44 |issue=2 |pages=273–289 |doi=10.1017/pab.2017.33 |bibcode=2018Pbio...44..273W |s2cid=90623487 }}
A study on the life mode of ammonite hatchlings, as indicated by the oxygen and carbon isotope composition of the embryonic shells and early postembryonic whorls of five juveniles of Hoploscaphites comprimus from the Fox Hills Formation (South Dakota, United States), is published by Linzmeier et al. (2018).{{Cite journal|author1=Benjamin J. Linzmeier |author2=Neil H. Landman |author3=Shanan E. Peters |author4=Reinhard Kozdon |author5=Kouki Kitajima |author6=John W. Valley |year=2018 |title=Ion microprobe–measured stable isotope evidence for ammonite habitat and life mode during early ontogeny |journal=Paleobiology |volume=44 |issue=4 |pages=684–708 |doi=10.1017/pab.2018.21 |bibcode=2018Pbio...44..684L |s2cid=92016561 }}
A study on the succession of latest Permian ammonite fossils in Iran is published by Kiessling et al. (2018), who interpret their findings as indicating that Permian–Triassic extinction event had a prelude leading to extinction pulses, a decline of body size and morphological simplification in latest Permian ammonites.{{Cite journal|author1=Wolfgang Kiessling |author2=Martin Schobben |author3=Abbas Ghaderi |author4=Vachik Hairapetian |author5=Lucyna Leda |author6=Dieter Korn |year=2018 |title=Pre–mass extinction decline of latest Permian ammonoids |journal=Geology |volume=46 |issue=3 |pages=283–286 |doi=10.1130/G39866.1 |bibcode=2018Geo....46..283K |doi-access=free }}
A study on the distribution and abundance of Early Triassic ammonites from the western United States basin is published by Jattiot et al. (2018).{{Cite journal|author1=Romain Jattiot |author2=Arnaud Brayard |author3=Hugo Bucher |author4=Emmanuelle Vennin |author5=Gwénaël Caravaca |author6=James F. Jenks |author7=Kevin G. Bylund |author8=Gilles Escarguel |year=2018 |title=Palaeobiogeographical distribution of Smithian (Early Triassic) ammonoid faunas within the western USA basin and its controlling parameters |journal=Palaeontology |volume=61 |issue=6 |pages=881–904 |doi=10.1111/pala.12375 |bibcode=2018Palgy..61..881J |s2cid=133850803 |url=https://hal.archives-ouvertes.fr/hal-01905729/file/Jattiot%20et%20al_Palaeontology%20HAL.pdf }}
A study testing whether the Rapoport effect can be observed among the early Pliensbachian ammonites from the area of the present-day Europe, the Middle East and North Africa is published by Zacaï et al. (2018).{{Cite journal|author1=Axelle Zacaï |author2=Arnaud Brayard |author3=Rémi Laffont |author4=Jean-Louis Dommergues |author5=Christian Meister |author6=Emmanuel Fara |year=2018 |title=The Rapoport effect and the climatic variability hypothesis in Early Jurassic ammonites |journal=Palaeontology |volume=61 |issue=6 |pages=963–980 |doi=10.1111/pala.12389 |doi-access=free |bibcode=2018Palgy..61..963Z }}
A study on the number of eggs laid by large adult females of Cretaceous ammonites and belemnites, as well as on the ecological niches occupied by juvenile ammonites and belemnites, is published by Tajika, Nützel & Klug (2018).{{Cite journal|author1=Amane Tajika |author2=Alexander Nützel |author3=Christian Klug |year=2018 |title=The old and the new plankton: ecological replacement of associations of mollusc plankton and giant filter feeders after the Cretaceous? |journal=PeerJ |volume=6 |pages=e4219 |doi=10.7717/peerj.4219 |pmid=29333344 |pmc=5765809 |doi-access=free }}
Ammonite nuclei (earliest whorls), representing a rare case of preservation of very early ontogenetic stages of ammonites and indicating high juvenile mortality that is seldom recorded in the fossil record of this group, are described from the Cretaceous (upper Turonian to Coniacian) of Tanzania by Ifrim, Wendler & Lehmann (2018), who interpret their finding as indicating that the mating and spawning areas of ammonites were locally restricted, and that their earliest ontogenetic stages were probably distributed by currents passing by their mating and spawning areas, similar to extant coleoids.{{Cite journal|author1=Christina Ifrim |author2=Ines Wendler |author3=Jens Lehmann |year=2018 |title=Taphonomy of ammonoid nuclei from the Turonian—Coniacian (Upper Cretaceous) of a Tanzania drilling project core – Implications for ammonoid dispersal |journal=Cretaceous Research |volume=87 |pages=185–193 |doi=10.1016/j.cretres.2017.08.014 |bibcode=2018CrRes..87..185I |s2cid=134846055 }}
A study on the paleoecology of the ammonites belonging to the genera Baculites and Scaphites, as indicated by the intracolonial variance in the size of zooids of cheilostome bryozoans that colonized the internal body chambers of the shells of these ammonites once they settled to the seafloor following the death of the ammonite, is published by Berry (2018).{{Cite journal|author=Keith Berry |year=2018 |title=On the paleoecology of the index ammonites Baculites (Lamarck, 1799) and Scaphites (Parkinson, 1811) as revealed by a study of relatively rare epizoans |journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen |volume=288 |issue=2 |pages=221–226 |doi=10.1127/njgpa/2018/0734 }}
A study on the growth of spines in Kimmeridgian aspidoceratids, Turonian euomphaloceratines and Coniacian collignoniceratids is published by Ifrim, Bengtson & Schweigert (2018).{{Cite journal|author1=Christina Ifrim |author2=Peter Bengtson |author3=Günter Schweigert |year=2018 |title=Growth and function of spines in Jurassic and Cretaceous ammonites |journal=Cretaceous Research |volume=88 |pages=62–78 |doi=10.1016/j.cretres.2017.05.003 |bibcode=2018CrRes..88...62I }}
A study on the suture lines in Cretaceous ammonite genera and on the link between suture complexity and generic longevity in ammonites is published by Pérez-Claros & Bengtson (2018).{{Cite journal|author1=Juan Antonio Pérez-Claros |author2=Peter Bengtson |year=2018 |title=Evolution of complexity and natural selection: Suture complexity and its relation to taxonomic longevity in Cretaceous ammonoids |journal=Cretaceous Research |volume=88 |pages=55–61 |doi=10.1016/j.cretres.2017.02.008 |bibcode=2018CrRes..88...55P |s2cid=132805726 }}
A study on the ammonite turnover events during the broad 'mid-Cretaceous' interval is published by Bengtson & Kakabadze (2018).{{Cite journal|author1=Peter Bengtson |author2=Mikheil V. Kakabadze |year=2018 |title=Ammonites and the mid-Cretaceous saga |journal=Cretaceous Research |volume=88 |pages=90–99 |doi=10.1016/j.cretres.2017.10.003 |bibcode=2018CrRes..88...90B |s2cid=134962688 }}
A sclerochronological study of shell material from seep and age-equivalent non-seep specimens of Baculites compressus, aiming to test the hypothesis that methane seeps provided a habitat for ammonites, is published by Landman et al. (2018).{{Cite journal|author1=Neil H. Landman |author2=J. Kirk Cochran |author3=Mariah Slovacek |author4=Neal L. Larson |author5=Matthew P. Garb |author6=Jamie Brezina |author7=James D. Witts |year=2018 |title=Isotope sclerochronology of ammonites (Baculites compressus) from methane seep and non-seep sites in the Late Cretaceous Western Interior Seaway, USA: Implications for ammonite habitat and mode of life |journal=American Journal of Science |volume=318 |issue=6 |pages=603–639 |doi=10.2475/06.2018.01 |bibcode=2018AmJS..318..603L |s2cid=134739569 }}

=New taxa=

Name ! Novelty ! Status ! Authors ! Age ! Unit ! Location ! Notes ! Images
class="wikitable sortable" align="center" width="100%"
Ambites bjerageri \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Ceratite Marls \| {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Gyronitidae. \|
Ambites bojeseni \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Ceratite Marls \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Gyronitidae. \|
Ambites nyingmai{{Cite book\|author1=David Ware \|author2=Hugo Bucher \|author3=Thomas Brühwiler \|author4=Leopold Krystyn \|year=2018 \|title=Dienerian (Early Triassic) ammonoids from Spiti, Himachal Pradesh, India \|journal=Fossils and Strata \|volume=63 \|pages=177–241 \|doi=10.1002/9781119522812.ch3 \|series=Fossils and Strata Series \|isbn=9781119522867 \|s2cid=134942634 }} \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| \| {{Flag\|India}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Gyronitidae. \|
Ambites subradiatus \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Ceratite Marls \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Gyronitidae. \|
Ambites tenuis \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Lower Ceratite Limestone \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Gyronitidae. \|
Arctoceras rubyae{{Cite journal\|author1=James F. Jenks \|author2=Arnaud Brayard \|year=2018 \|title=Smithian (Early Triassic) ammonoids from Crittenden Springs, Elko County, Nevada: Taxonomy, biostratigraphy and biogeography \|journal=New Mexico Museum of Natural History and Science Bulletin \|volume=78 \|pages=1–175 }} \| Sp. nov \| Valid \| Jenks & Brayard \| Early Triassic \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| \|
Aspenites weitschati \| Sp. nov \| Valid \| Jenks & Brayard \| Early Triassic \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| \|
Aspidoceras (Pseudowaagenia) inerme{{cite journal \|author=Raymond Énay \|year=2018 \|title=Lithostratigraphie, biostratigraphie et faunes d'ammonites du complexe corallien d'âge kimméridgien supérieur du Jura méridional et de l'Ile Crémieu (France) \|journal=Revue de Paléobiologie, Genève \|volume=37 \|issue=1 \|pages=41–108 \|url=http://institutions.ville-geneve.ch/fileadmin/user_upload/mhn/documents/Museum/Revue_de_Paleo/41-108_Enay.pdf}} \| Sp. nov \| Valid \| Énay \| Late Jurassic (Kimmeridgian) \| \| {{Flag\|France}} \| \|
Awanites{{Cite book\|author1=David Ware \|author2=Hugo Bucher \|author3=Thomas Brühwiler \|author4=Elke Schneebeli-Hermann \|author5=Peter A. Hochuli \|author6=Ghazala Roohi \|author7=Khalil Ur-Rehman \|author8=Amir Yaseen \|year=2018 \|title=Griesbachian and Dienerian (Early Triassic) ammonoids from the Salt Range, Pakistan \|journal=Fossils and Strata \|volume=63 \|pages=11–175 \|doi=10.1002/9781119522812.ch2 \|series=Fossils and Strata Series \|isbn=9781119522867 \|s2cid=135208640 }} \| Gen. et sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Ceratite Marls \| {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Paranoritidae. Genus includes new species A. awani. \|
Borroceras{{Cite journal\|author1=Jean Vermeulen \|author2=Pierre Lazarin \|author3=Patrick Lépinay \|author4=Lucien Leroy \|author5=Emile Mascarelli \|year=2018 \|title=Taxa d'ammonites nouveaux ou peu connus du Crétacé inférieur du sud-est de la France \|journal=Riviera Scientifique \|volume=102 \|pages=81–98 \|url=https://asnatnic.fr/wp-content/uploads/2020/11/Riviera-2018-Vermeulen-et-all.pdf }} \| Gen. et sp. et comb. nov \| Valid \| Vermeulen et al. \| Early Cretaceous \| \| {{Flag\|France}} \| A relative of Emericiceras. The type species is B. borroi; genus also includes B. ottohaasi (Sarkar, 1955) and B. mahadevai (Sarkar, 1955). \|
Bukkenites sakesarensis \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Lower Ceratite Limestone \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Proptychitidae. \|
Bullatihungarites \| Gen. et comb. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| Vászoly Formation \| {{Flag\|Bosnia and Herzegovina}} {{Flag\|Hungary}} {{Flag\|Italy}} \| A member of the family Hungaritidae. The type species is "Hungarites" emiliae Mojsisovics (1882); genus also includes "Ceratites (Hungarites)" semiplicatus Hauer (1896). \|
Clausiuraloceras mechetlense{{cite journal \|author=R. V. Kutygin \|year=2018 \|title=Clausiuraloceras mechetlense, a new ammonoid species from the Kungurian of the southern Cisuralian Region \|journal=Paleontological Journal \|volume=52 \|issue=4 \|pages=365–378 \|doi=10.1134/S003103011804007X \|bibcode=2018PalJ...52..365K \|s2cid=91907471 }} \| Sp. nov \| Valid \| Kutygin \| Permian (Kungurian) \| \| {{Flag\|Russia}} \| \|
Comahueites{{Cite journal\|author1=Beatriz Aguirre-Urreta \|author2=Peter F. Rawson \|year=2018 \|title=New Valanginian-Hauterivian neocomitid ammonites from the Neuquén Basin, Argentina \|journal=Cretaceous Research \|volume=88 \|pages=149–157 \|doi=10.1016/j.cretres.2017.03.017 \|bibcode=2018CrRes..88..149A \|s2cid=132474014 }} \| Gen. et sp. nov \| Valid \| Aguirre-Urreta & Rawson \| Early Cretaceous (Early Hauterivian) \| Agrio Formation \| {{Flag\|Argentina}} \| A member of the family Neocomitidae. Genus includes new species C. aequalicostatus. \|
Condensoceras \| Gen. et comb. nov \| Valid \| Jenks & Brayard \| Early Triassic \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| A member of the family Xenoceltitidae; a new genus for "Xenoceltites" youngi Kummel & Steele (1962). \|
Conteites{{cite journal \|author1=Gérard Delanoy \|author2=Camille Frau \|author3=Robert Busnardo \|author4=Anthony J.B. Tendil \|year=2018 \|title=Nouveaux genres d'ammonite Heteroceratidae du Barrémien supérieur de la Téthys méditerranéenne \|journal=Annales du Muséum d'Histoire Naturelle de Nice \|volume=XXXIII \|pages=33–45 \|url=https://www.researchgate.net/publication/337926181 }} \| Gen. et comb. nov \| Valid \| Delanoy et al. \| Early Cretaceous (Barremian) \| \| {{Flag\|France}} \| A member of Ancyloceratina belonging to the family Heteroceratidae. The type species is "Heteroceras" fuhrae Delanoy (1997). \|
Costaclymenia subsolaris{{Cite journal\|author1=Dieter Korn \|author2=Jürgen Bockwinkel \|author3=Volker Ebbighausen \|year=2018 \|title=Middle Famennian (Late Devonian) ammonoids from the Anti-Atlas of Morocco. 4. Costaclymenia \|journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen \|volume=289 \|issue=1 \|pages=35–41 \|doi=10.1127/njgpa/2018/0748 \|s2cid=134358158 }} \| Sp. nov \| Valid \| Korn, Bockwinkel & Ebbighausen \| Devonian (Famennian) \| \| {{Flag\|Morocco}} \| \|
Crittendenites \| Gen. et sp. nov \| Valid \| Jenks & Brayard \| Early Triassic \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| A relative of Wyomingites Hyatt (1900); both genera are assigned to the new family Crittendentidae. Genus includes new species C. jattioti. \|
Delphinites heineae{{Cite journal\|author=V. V. Mitta \|year=2018 \|title=The genus Delphinites Sayn (Ammonoidea: Neocomitidae) in the lower Valanginian of the Russian Platform \|journal=Paleontological Journal \|volume=52 \|issue=13 \|pages=1504–1516 \|doi=10.1134/S0031030118130105 \|bibcode=2018PalJ...52.1504M \|s2cid=92806405 }} \| Sp. nov \| Valid \| Mitta \| Early Cretaceous (Valanginian) \| \| {{Flag\|Russia}} \| A member of the family Neocomitidae. \|
Diptychoceras iwatense{{Cite journal\|author1=Ikuwo Obata \|author2=Masaki Matsukawa \|year=2018 \|title=Aptian and Albian ammonites of the Miyako Group, Japan: Lower Cretaceous ammonites of the Miyako Group, Part 11 \|journal=Cretaceous Research \|volume=88 \|pages=227–272 \|doi=10.1016/j.cretres.2017.09.010 \|bibcode=2018CrRes..88..227O \|s2cid=133844427 }} \| Sp. nov \| Valid \| Obata & Matsukawa \| Early Cretaceous \| Miyako Group \| {{Flag\|Japan}} \| \|
Djanaliparkinsonia alanica{{cite journal \|author=V. V. Mitta \|year=2018 \|title=On the first finds of the genus Djanaliparkinsonia (Stephanoceratidae, Ammonoidea) in the Upper Bajocian of the Northern Caucasus \|journal=Paleontological Journal \|volume=52 \|issue=4 \|pages=379–388 \|doi=10.1134/S0031030118040093 \|bibcode=2018PalJ...52..379M \|s2cid=91860882 }} \| Sp. nov \| Valid \| Mitta \| Middle Jurassic (Bajocian) \| Djangura Formation \| {{Flag\|Russia}} ({{Flag\|Karachay-Cherkessia}}) \| A member of the family Stephanoceratidae. \|
Dorsoplanites typicus{{Cite journal\|author1=V.V. Mitta \|author2=I.A. Starodubtseva \|year=2018 \|title=On some Volgian ammonites and their nomenclatural types \|journal=Paleontological Journal \|volume=52 \|issue=5 \|pages=469–480 \|doi=10.1134/S0031030118050076 \|bibcode=2018PalJ...52..469M \|s2cid=91264875 \|url=https://elibrary.ru/item.asp?id=35524920 }} \| Nom. nov \| Valid \| Mitta & Starodubtseva \| Late Jurassic \| \| {{Flag\|Russia}} \| A replacement name for Dorsoplanites panderi auct. non Eichwald (1840). \|
Elkoceras \| Gen. et comb. nov \| Valid \| Jenks & Brayard \| Early Triassic \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| An ammonite of uncertain phylogenetic placement; a new genus for "Dieneroceras" spathi Kummel & Steele (1962). \|
Eofrechites{{Cite journal\|author1=Cheng Ji \|author2=Hugo Bucher \|year=2018 \|title=Anisian (Middle Triassic) ammonoids from British Columbia (Canada): biochronological and palaeobiogeographical implications \|journal=Papers in Palaeontology \|volume=4 \|issue=4 \|pages=623–642 \|doi=10.1002/spp2.1222 \|doi-access=free \|bibcode=2018PPal....4..623J }} \| Gen. et sp. nov \| Valid \| Ji & Bucher \| Middle Triassic (Anisian) \| \| {{Flag\|Canada}} ({{Flag\|British Columbia}}) \| Genus includes new species E. roopnarini. \|
Eoscaphites kuersteineri{{Cite journal\|author1=Amane Tajika \|author2=Karl Tschanz \|author3=Christian Klug \|year=2018 \|title=New Albian ammonite faunas from Semelenberg (Alpstein, Switzerland) and their paleoecology \|journal=Swiss Journal of Palaeontology \|volume=137 \|issue=1 \|pages=65–76 \|doi=10.1007/s13358-018-0152-2 \|bibcode=2018SwJP..137...65T \|s2cid=134899092 }} \| Sp. nov \| Valid \| Tajika, Tschanz & Klug \| Early Cretaceous (Albian) \| \| {{Flag\|Switzerland}} \| \|
Epikellnerites{{Cite journal\|author=Attila Vörös \|year=2018 \|title=The Upper Anisian ammonoids of the Balaton Highland (Hungary) \|journal=Geologica Hungarica Series Palaeontologica \|volume=60 \|pages=1–241 \|url=https://epa.oszk.hu/02900/02989/00054/pdf/ }} \| Gen. et comb. et 4 sp. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| \| {{Flag\|Bosnia and Herzegovina}} {{Flag\|Hungary}} {{Flag\|Italy}} \| A member of the family Ceratitidae. The type species is "Ceratites" angustecarinatus Hauer (1896); genus also includes "Kellnerites" bagolinensis Brack & Rieber (1993), as well as new species E. tamasi, E. vaszolyensis, E. pseudocholnokyi and E. spinatus. \|
Gambleites \| Gen. et sp. nov \| Valid \| Jenks & Brayard \| Early Triassic \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| A member of the family Proptychitidae. Genus includes new species G. eichhorni. \|
Geticeras{{Cite journal \|author1=Bindhyachal Pandey \|author2=Deo Brat Pathak \|author3=Anand Kumar Jaitly \|year=2018 \|title=A new ammonite Geticeras gen. nov. from the Lower Valanginian (Lower Cretaceous) of the Spiti Valley, Tethys Himalaya, India \|journal=Himalayan Geology \|volume=39 \|issue=1 \|pages=115–120 \|url=http://www.himgeology.com/volume_abstract.php?abstract=872 \|access-date=2018-06-02 \|archive-url=https://web.archive.org/web/20181118123031/http://www.himgeology.com/volume_abstract.php?abstract=872 \|archive-date=2018-11-18 \|url-status=dead }} \| Gen. et sp. nov \| Valid \| Pandey, Pathak & Jaitly \| Early Cretaceous (Valanginian) \| Giumal Formation \| {{Flag\|India}} \| A member of the family Neocomitidae. The type species is G. getensis. \|
Ghazalaites \| Gen. et sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Lower Ceratite Limestone \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of the family Ophiceratidae. The type species is G. roohii. \|
Glaucolithites gardarikensis{{Cite journal\|author1=D. N. Kiselev \|author2=M. A. Rogov \|year=2018 \|title=Ammonites and stratigraphy of the terminal part of the Middle Volgian Substage (Upper Jurassic; Epivirgatites nikitini Zone and its equivalents) of the Panboreal Realm: 2. Titanites and Glaucolithites \|journal=Stratigraphy and Geological Correlation \|volume=26 \|issue=1 \|pages=15–61 \|doi=10.1134/S0869593818010057 \|url=https://www.researchgate.net/publication/323219018 \|bibcode=2018SGC....26...15K \|s2cid=133641574 }} \| Sp. nov \| Valid \| Kiselev in Kiselev & Rogov \| Late Jurassic \| \| {{Flag\|Russia}} ({{Flag\|Ulyanovsk Oblast}}) \| A member of the family Dorsoplanitidae. \|
Gyronites bullatus \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| \| {{Flag\|India}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Gyronitidae. \|
Gyronites levilatus \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| \| {{Flag\|India}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Gyronitidae. \|
Gyronites schwanderi \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Lower Ceratite Limestone \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Gyronitidae. \|
Heteroceras gracile{{Cite journal \|author1=Cyril Baudouin \|author2=Gérard Delanoy \|author3=Grégoire Bournaud \|author4=Roland Gonnet \|year=2018 \|title=Heteroceras gracile sp. nov., a new species of Heteroceras Orbigny, 1849, from the upper Barremian of Morteiron (Alpes de Haute-Provence, France) \|journal=Carnets de Géologie \|volume=18 \|issue=6 \|pages=155–165 \|doi=10.4267/2042/66955 \|doi-access=free }} \| Sp. nov \| Valid \| Baudouin et al. \| Early Cretaceous (late Barremian) \| \| {{Flag\|Bulgaria}} {{Flag\|France}} {{Flag\|Japan}}? \| \|
Hungarites sinuosus \| Sp. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| Vászoly Formation \| {{Flag\|Hungary}} \| A member of the family Hungaritidae. \|
Hungarites szentei \| Sp. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| Vászoly Formation \| {{Flag\|Hungary}} \| A member of the family Hungaritidae. \|
Hybonoticeras authariformis{{Cite journal\|author1=Federico Olóriz \|author2=Ana Bertha Villaseñor \|year=2018 \|title=New species of lower Tithonian macroconchiate Hybonoticeras from Mexico and the co-occurrence of Mazapilites and Hybonoticeras in the Mexico-Caribbean area \|journal=Journal of Paleontology \|volume=92 \|issue=S75 \|pages=1–43 \|doi=10.1017/jpa.2017.97 \|bibcode=2018JPal...92S...1O \|s2cid=135032202 }} \| Sp. nov \| Valid \| Olóriz & Villaseñor \| Late Jurassic (Tithonian) \| \| {{Flag\|Mexico}} \| \|
Hypacanthoplites regina \| Sp. nov \| Valid \| Obata & Matsukawa \| Early Cretaceous \| Miyako Group \| {{Flag\|Japan}} \| \|
Hyparpadites szaboi \| Sp. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| Vászoly Formation \| {{Flag\|Hungary}} \| A member of the family Ceratitidae. \|
Immelites{{Cite journal\|author1=Luc G. Bulot \|author2=Camille Frau \|author3=Antoine Pictet \|year=2018 \|title=Revision of Toxoceratoides royeri (d'Orbigny, 1842) and its bearing on the systematics of the Aptian Acrioceratidae Vermeulen, 2004 (Ammonoidea, Ancyloceratina, Ancyloceratoidea) \|journal=Cretaceous Research \|volume=88 \|pages=187–196 \|doi=10.1016/j.cretres.2017.03.020 \|bibcode=2018CrRes..88..187B \|s2cid=90710079 }} \| Gen. et comb. nov \| Valid \| Bulot, Frau & Pictet \| Early Cretaceous (Aptian) \| Ganbadongshan Formation \| {{Flag\|China}} \| A member of the family Acrioceratidae; a new genus for "Tonohamites" multituberculatus Immel & Guoxiong (2002). \|
Jenslehmannella \| Gen. et sp. nov \| Valid \| Bulot, Frau & Pictet \| Early Cretaceous (Early Aptian) \| Dariyan Formation \| {{Flag\|Iran}} \| A member of the family Acrioceratidae. The type species is J. bangestanense. \|
Karasyazites{{Cite journal\|author=V.V. Mitta \|year=2018 \|title=Ammonites of Tethyan origin in the Ryazanian stage of the Russian Platform: genera Transcaspiites Luppov and Karasyazites gen. nov. \|journal=Paleontological Journal \|volume=52 \|issue=3 \|pages=245–254 \|doi=10.1134/S0031030118030097 \|bibcode=2018PalJ...52..245M \|s2cid=90814758 \|url=https://elibrary.ru/item.asp?id=34941278 }} \| Gen. et comb. nov \| Valid \| Mitta \| Early Cretaceous \| \| {{Flag\|Russia}} \| A member of the family Himalayitidae. The type species is "Subalpinites" bajarunasi Luppov. \|
Klingerites \| Gen. et comb. nov \| Valid \| Bulot, Frau & Pictet \| Early Cretaceous (Aptian) \| \| {{Flag\|Argentina}} {{Flag\|Madagascar}} {{Flag\|South Africa}} \| A member of the family Acrioceratidae; a new genus for "Toxoceratoides"? haughtoni Klinger & Kennedy (1977). \|
Koiloceras sahibi \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Lower Ceratite Limestone \| {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Paranoritidae. \|
Kossmaticeras (Kossmaticeras) kilenensis{{Cite journal\|author=Peter Alsen \|year=2018 \|title=Kossmaticeras in North Greenland \|journal=Cretaceous Research \|volume=88 \|pages=399–408 \|doi=10.1016/j.cretres.2017.10.010 \|bibcode=2018CrRes..88..399A \|s2cid=135322939 }} \| Sp. nov \| Valid \| Alsen \| Late Cretaceous (Coniacian) \| Sølverbæk Formation \| {{Flag\|Greenland}} \| \|
Kyoktites \| Gen. et sp. et comb. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Lower Ceratite Limestone \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of the family Ophiceratidae. The type species is K. hebeiseni; genus also includes "Meekoceras" kyokticum von Krafft (1909). \|
Leioceras hansrieberi{{Cite journal\|author1=Volker Dietze \|author2=Günter Schweigert \|year=2018 \|title=The hansrieberi biohorizon (Aalenian; Opalinum Zone) in the Opalinuston Formation of Donzdorf-Grünbach (Eastern Swabian Alb, Germany) \|journal=Palaeodiversity \|volume=11 \|issue=1 \|pages=29–57 \|doi=10.18476/pale.11.a4 \|s2cid=135457796 \|doi-access=free }} \| Sp. nov \| Valid \| Dietze & Schweigert \| Middle Jurassic (Aalenian) \| Opalinuston Formation \| {{Flag\|Germany}} \| A member of the family Graphoceratidae. \|
Leviclymenia ramula{{Cite journal\|author1=Sven Hartenfels \|author2=Ralph Thomas Becker \|year=2018 \|title=Age and correlation of the transgressive Gonioclymenia Limestone (Famennian, Tafilalt, eastern Anti-Atlas, Morocco) \|journal=Geological Magazine \|volume=155 \|issue=3 \|pages=586–629 \|doi=10.1017/S0016756816000893 \|bibcode=2018GeoM..155..586H \|s2cid=133466476 }} \| Sp. nov \| Valid \| Hartenfels & Becker \| Devonian (Famennian) \| \| {{Flag\|Morocco}} \| \|
Lobitoceras{{Cite journal\|author=Michael Robert Cooper \|year=2018 \|title=The Arestoceratinae van Hoepen, 1942: A resurrected subfamily of late Albian brancoceratid ammonites, with description of a new genus \|journal=Cretaceous Research \|volume=88 \|pages=302–324 \|doi=10.1016/j.cretres.2017.08.007 \|bibcode=2018CrRes..88..302C }} \| Gen. et comb. nov \| Valid \| Cooper \| Early Cretaceous (Albian) \| \| {{Flag\|Angola}} \| A member of the family Brancoceratidae. The type species is "Elobiceras" arietiforme Spath (1922); genus also includes L. decipiens (Spath, 1922), L. flexicostatum (Spath, 1922), L. irregulare (Spath, 1922), L. szajnochai (Spath, 1922) and L. spathianum (Haas, 1942). \|
Loyezia jaenensis{{cite journal \|author1=Jean Vermeulen \|author2=Alain Borro \|author3=Pierre Lazarin \|author4=Patrick Lépinay \|author5=Lucien Leroy \|author6=Emile Mascarelli \|year=2018 \|title=Taxa nouveaux ou peu connus d'ammonites de l'Hauterivien supérieur \|journal=Annales du Muséum d'Histoire Naturelle de Nice \|volume=XXXIII \|pages=1–22 }} \| Sp. nov \| Valid \| Vermeulen et al. \| Early Cretaceous \| \| {{Flag\|Spain}} \| A member of the family Crioceratitidae. Originally described as a species of Loyezia, but subsequently transferred to the genus Binelliceras by Vermeulen et al. (2019).{{Cite journal\|author1=Jean Vermeulen \|author2=Alain Borro \|author3=Pierre Lazarin \|author4=Patrick Lépinay \|author5=Lucien Leroy \|author6=Emile Mascarelli \|year=2019 \|title=Sur deux nouvelles espèces de la famille des Crioceratitidae GILL. 1871 nom, correct. WRIGHT, 1952 (Ancyloceratina) \|journal=Riviera Scientifique \|volume=103 \|pages=79–96 }} \|
Meekoceras bylundi \| Sp. nov \| Valid \| Jenks & Brayard \| Early Triassic \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| \|
Montelloites \| Gen. et sp. nov \| Valid \| Jenks & Brayard \| Early Triassic \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| A member of the family Galfettitidae. Genus includes new species M. stephensi. \|
Moutaiceras \| Gen. et comb. nov \| Valid \| Cooper \| Early Cretaceous (Albian) \| \| {{Flag\|Angola}} \| A member of the family Brancoceratidae; a new genus for "Sharpeiceras" goliath Haas (1942). \|
Mullericeras gujiaoense{{Cite journal\|author1=Xu Dai \|author2=Haijun Song \|author3=Arnaud Brayard \|author4=David Ware \|year=2018 \|title=A new Griesbachian–Dienerian (Induan, Early Triassic) ammonoid fauna from Gujiao, South China \|journal=Journal of Paleontology \|volume=93 \|issue=1 \|pages=48–71 \|doi=10.1017/jpa.2018.46 \|s2cid=133694520 \|url=https://hal.archives-ouvertes.fr/hal-01986349 }} \| Sp. nov \| Valid \| Dai et al. \| Early Triassic (Induan) \| Daye Formation \| {{Flag\|China}} \| \|
Mullericeras indusense \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Ceratite Marls \| {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Mullericeratidae. \|
Mullericeras niazii \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Ceratite Marls \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Mullericeratidae. \|
Mullericeras shigetai \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Ceratite Marls \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Mullericeratidae. \|
Neocosmoceras eliasi{{Cite journal\|author1=Zdeněk Vašíček \|author2=Petr Skupien \|author3=John W.M. Jagt \|year=2018 \|title=Current knowledge of ammonite assemblages from the Štramberk Limestone (Tithonian–lower Berriasian) at Kotouč Quarry, Outer Western Carpathians (Czech Republic) \|journal=Cretaceous Research \|volume=90 \|pages=185–203 \|doi=10.1016/j.cretres.2018.04.016 \|bibcode=2018CrRes..90..185V \|s2cid=134081133 }} \| Sp. nov \| Valid \| Vašíček, Skupien & Jagt \| Early Cretaceous (early Berriasian) \| Štramberk Limestone \| {{Flag\|Czech Republic}} \| \|
Neopetitclercia{{Cite journal\|author1=Günter Schweigert \|author2=Martin Kapitzke \|year=2018 \|title=Neopetitclercia, a new ammonite genus (Strigoceratidae: Phlycticeratinae) from the lower Kimmeridgian (Upper Jurassic) of SW Germany \|journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen \|volume=288 \|issue=2 \|pages=121–127 \|doi=10.1127/njgpa/2018/0727 }} \| Gen. et sp. nov \| Valid \| Schweigert & Kapitzke \| Late Jurassic (Kimmeridgian) \| Impressamergel Formation \| {{Flag\|Germany}} \| A member of the family Strigoceratidae belonging to the subfamily Phlycticeratinae. The type species is N. jantschkei. \|
Nodicoeloceras middlegatense{{Cite journal \|author1=Andrew H. Caruthers \|author2=Paul L. Smith \|author3=Darren R. Gröcke \|author4=Benjamin C. Gill \|author5=Theodore R. Them II \|author6=João P. Trabucho Alexandre \|year=2018 \|title=Pliensbachian–Toarcian (Early Jurassic) ammonoids from the Luning Embayment, West-Central Nevada, U.S.A. \|journal=Bulletins of American Paleontology \|volume=393 \|pages=1–84 \|url=https://www.priweb.org/downloads/pubs/item_pdf_5823.pdf \|access-date=2018-07-23 \|archive-date=2018-06-19 \|archive-url=https://web.archive.org/web/20180619113308/https://www.priweb.org/downloads/pubs/item_pdf_5823.pdf \|url-status=dead }} \| Sp. nov \| Valid \| Caruthers et al. \| Early Jurassic (Lower Toarcian) \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| \|
Nodicoeloceras nevadaense \| Sp. nov \| Valid \| Caruthers et al. \| Early Jurassic (Lower Toarcian) \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| \|
Nodihungarites \| Gen. et comb. et sp. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| Vászoly Formation \| {{Flag\|Hungary}} \| A member of the family Hungaritidae. The type species is "Hungarites" bocsarensis Arthaber (1903); genus also includes new species N. vinczei. \|
Orientosirenites{{Cite journal\|author=A. G. Konstantinov \|year=2018 \|title=Orientosirenites, a new ammonoid genus (Sirenitidae; Ammonoidea) from the Upper Carnian of the Boreal Realm \|journal=Paleontological Journal \|volume=52 \|issue=1 \|pages=18–26 \|doi=10.1134/S0031030118010094 \|bibcode=2018PalJ...52...18K \|s2cid=89840703 \|url=https://elibrary.ru/item.asp?id=32290530 }} \| Gen. et sp. et comb. nov \| Valid \| Konstantinov \| Late Triassic (Carnian) \| \| {{Flag\|Russia}} \| A member of the family Sirenitidae. The type species is O. bytschkovi; genus also includes O. yakutensis (Kiparisova). \|
Parafrechites cordeyi \| Sp. nov \| Valid \| Ji & Bucher \| Middle Triassic (Anisian) \| \| {{Flag\|Canada}} ({{Flag\|British Columbia}}) \| \|
Parahungarites \| Gen. et comb. et sp. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| Vászoly Formation \| {{Flag\|Bosnia and Herzegovina}} {{Flag\|Hungary}} {{Flag\|Italy}} \| A member of the family Ceratitidae. The type species is "Hungarites" arthaberi Diener (1899); genus also includes new species P. solyensis. \|
Parakellnerites stuerzenbaumi \| Sp. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| Vászoly Formation \| {{Flag\|Hungary}} \| A member of the family Ceratitidae. \|
Pashtunites \| Gen. et comb. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Paranoritidae. Genus includes "Koninckites" kraffti Spath (1934). \|
Patrulia karachaica{{Cite journal\|author1=Vasily V. Mitta \|author2=Mikhail P. Sherstyukov \|year=2018 \|title=First record of Patrulia (Ammonoidea: Stephanoceratidae) in the Upper Bajocian of the Northern Caucasus, Russia \|journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen \|volume=288 \|issue=3 \|pages=251–254 \|doi=10.1127/njgpa/2018/0739 \|s2cid=134159981 }} \| Sp. nov \| Valid \| Mitta in Mitta & Sherstyukov \| Middle Jurassic (Bajocian) \| \| {{Flag\|Russia}} ({{Flag\|Karachay-Cherkessia}}) \| A member of the family Stephanoceratidae. \|
Phylloceras (Gyrophylloceras){{Cite journal\|author1=Raymond Énay \|author2=Michael K. Howarth \|year=2018 \|title=Stevensites, Zittelites, and Gyrophylloceras, new generic names proposed for Stevensia Énay, 2009, Zittelia Tavera Benitez, 1985, and Gyrophyllites Wiedmann, 1963 (Mollusca: Ammonoidea) \|journal=Paleontological Contributions \|volume=19 \|pages=1–2 \|doi=10.17161/1808.26312 \|hdl=1808/26312 \|s2cid=165726603 \|doi-access=free }} \| Nom. nov \| Valid \| Howarth in Énay & Howarth \| Early Cretaceous \| \| {{Flag\|Tunisia}} \| A subgenus of Phylloceras; a replacement name for Gyrophyllites Wiedmann (1963). The type species is Phylloceras lateumbilicatum Pervinquière (1907). \|
Phyllopachyceras reymenti{{Cite journal\|author=Alberto C. Riccardi \|year=2018 \|title=Additional Aptian-Albian ammonoids from Patagonia \|journal=Cretaceous Research \|volume=88 \|pages=210–226 \|doi=10.1016/j.cretres.2017.04.007 \|bibcode=2018CrRes..88..210R \|s2cid=135389821 }} \| Sp. nov \| Valid \| Riccardi \| Early Cretaceous \| \| {{Flag\|Argentina}} \| \|
Physodoceras widerai{{Cite journal\|author1=Armin Scherzinger \|author2=Horacio Parent \|author3=Günter Schweigert \|year=2018 \|title=A new species of the ammonite genus Physodoceras Hyatt (Aspidoceratidae) from the Hybonotum Zone (Lower Tithonian) of Southern Germany, with comments on the phylogeny of the genus \|journal=Boletín del Instituto de Fisiografía y Geología \|volume=88 \|pages=11–24 \|url=https://www.fceia.unr.edu.ar/fisiografia/volumen88/scherzinger_etal_bifg88.pdf }} \| Sp. nov \| Valid \| Scherzinger, Parent & Schweigert \| Late Jurassic (Tithonian) \| Hangende-Bankkalke Formation \| {{Flag\|Germany}} \| A member of the family Aspidoceratidae. \|
Prodactylioceras westgatenses \| Sp. nov \| Valid \| Caruthers et al. \| Early Jurassic (Upper Pliensbachian) \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| \|
Proptychites wargalensis \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Lower Ceratite Limestone \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Proptychitidae. \|
Protanisoceras hanaii \| Sp. nov \| Valid \| Obata & Matsukawa \| Early Cretaceous \| Miyako Group \| {{Flag\|Japan}} \| \|
Protengonoceras neolobitoides{{Cite journal\|author1=Emmanuel Robert \|author2=Alejandro Samaniego-Pesqueira \|author3=Josep A. Moreno-Bedmar \|author4=Carlos M. Gonzalez-Leon \|year=2018 \|title=Aptian and Albian (Early Cretaceous) ammonites from Lampazos and the Bisbee groups (Sonora State, Northwest Mexico) \|journal=Cretaceous Research \|volume=86 \|pages=1–23 \|doi=10.1016/j.cretres.2018.02.001 \|bibcode=2018CrRes..86....1R }} \| Sp. nov \| Valid \| Robert et al. \| Early Cretaceous \| \| {{Flag\|Mexico}} \| \|
Protogrammoceras (Matteiceras) tipperi \| Sp. nov \| Valid \| Caruthers et al. \| Early Jurassic (Upper Pliensbachian) \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| \|
Protolongaeviceras{{cite book \|author1=V. G. Knyazev \|author2=S. V. Meledina \|author3=A. S. Alifirov \|year=2018 \|chapter=Protolongaeviceras - novyy srednekelloveyskiy rod ammonitov semeystva Cardioceratidae \|editor1=T.N. Bogdanova \|editor2=E.M. Bugrova \|editor3=V.A. Gavrilova \|editor4=I.O. Yevdokimova \|editor5=A.O. Ivanov \|editor6=O.L. Kossovaya \|editor7=M.V. Oshurkova \|editor8=Ye.V. Popov \|editor9=Ye.G. Rayevskaya \|editor10=A.A. Suyarkova \|editor11=A.S. Tesakov \|editor12=V.V. Titov \|editor13=T.Yu. Tolmacheva \|title=Fundamental'naya i prikladnaya paleontologiya. Materialy LXIV sessii Paleontologicheskogo obshchestva pri RAN (2-6 aprelya 2018 g., Sankt-Peterburg) \|pages=59–60 \|isbn=978-5-93761-254-0 }}{{cite journal \|author1=V. G. Knyazev \|author2=S. V. Meledina \|author3=A. S. Alifirov \|year=2019 \|title=Monographic description of the middle Callovian genus Protolongaeviceras \|journal=Geology and Mineral Resources of Siberia \|volume=2019 \|issue=2 \|pages=16–23 \|doi=10.20403/2078-0575-2019-2-16-23 \|s2cid=199207034 }} \| Gen. et comb. nov \| \| Knyazev, Meledina & Alifirov \| Middle Jurassic (Callovian) \| \| {{Flag\|Russia}} \| A member of Cardioceratidae. The type species is "Cadoceras (Streptocadoceras)" arcticoides Kiselev & Meledina (2004). \|
Pseudosageceras simplelobatum \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Ceratite Marls \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Sagecerataceae and the family Hedenstroemiidae. \|
Reymenticoceras{{Cite journal\|author=W.J. Kennedy \|year=2018 \|title=The ammonites Reymenticoceras gen. nov. nodosoidesappelatus Etayo-Serna, 1979 Benueites reymenti Collignon, 1976, and Tolimacoceras gen. nov. colombianus Etayo-Serna, 1979 from the lower Turonian of Tolima Province, Colombia \|journal=Cretaceous Research \|volume=88 \|pages=384–391 \|doi=10.1016/j.cretres.2017.02.020 \|bibcode=2018CrRes..88..384K \|s2cid=132358724 }} \| Gen. et comb. nov \| Valid \| Kennedy \| Late Cretaceous (Turonian) \| \| {{Flag\|Colombia}} \| A member of Mammitinae. A new genus for "Mammites" nodosoidesappelatus Etayo-Serna (1979). \|
Reynesocoeloceras corvalani \| Sp. nov \| Valid \| Caruthers et al. \| Early Jurassic (Upper Pliensbachian) \| \| {{Flag\|United States}} ({{Flag\|Nevada}}) \| \|
Richardreymentella \| Gen. et comb. nov \| Valid \| Bulot, Frau & Pictet \| Early Cretaceous (Late Aptian) \| \| {{Flag\|Argentina}} \| A member of the family Acrioceratidae; a new genus for "Ancyloceras" patagonicum Stolley (1912). \|
Rotopericyclus chaplini{{Cite journal\|author1=David M. Work \|author2=Charles E. Mason \|year=2018 \|title=The Mississippian (Late Tournaisian) ammonoid Rotopericyclus from the Borden Formation, Kentucky \|journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen \|volume=289 \|issue=3 \|pages=311–323 \|doi=10.1127/njgpa/2018/0763 \|s2cid=134704992 }} \| Sp. nov \| Valid \| Work & Mason \| Carboniferous (Tournaisian) \| Borden Formation \| {{Flag\|United States}} ({{Flag\|Kentucky}}) \| \|
Rotopericyclus howardi \| Sp. nov \| Valid \| Work & Mason \| Carboniferous (Tournaisian) \| Borden Formation \| {{Flag\|United States}} ({{Flag\|Kentucky}}) \| \|
Sakartveloceras \| Gen. et comb. nov \| Valid \| Delanoy et al. \| Early Cretaceous (Barremian) \| \| {{Flag\|Georgia}} {{Flag\|Iran}} {{Flag\|Turkmenistan}} \| A member of Ancyloceratina belonging to the family Heteroceratidae. The type species is "Ammonites" securiformis Simonovich, Batsevich & Sorokin (1875); genus also includes "Colchidites" shaoriensis Djanélidzé (1926), "C." elissoae Kakabadze (1971), "C." tenuicostatus Kakabadze (1971) and "C." veleurensis Kakabadze (1971). \|
Stevensites \| Nom. nov \| Valid \| Énay in Énay & Howarth \| Late Jurassic \| \| {{Flag\|Nepal}} \| A replacement name for Stevensia Énay (2009). The type species is "Kossmatia" desmidopthycha Uhlig (1910). \|
Stoppaniceras budaii \| Sp. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| Vászoly Formation \| {{Flag\|Hungary}} \| A member of the family Ceratitidae. \|
Stoppaniceras hermanni \| Sp. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| Vászoly Formation \| {{Flag\|Hungary}} \| A member of the family Ceratitidae. \|
Stoppaniceras rieberi \| Sp. nov \| Valid \| Vörös \| Middle Triassic (Anisian) \| Vászoly Formation \| {{Flag\|Hungary}} {{Flag\|Italy}} \| A member of the family Ceratitidae. \|
Subacerites \| Gen. et sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Ceratite Marls \| {{Flag\|Pakistan}} \| A member of Ceratitida of uncertain phylogenetic placement. Genus includes new species S. friski. \|
Sutneria armigerum \| Sp. nov \| Valid \| Énay \| Late Jurassic (Kimmeridgian) \| \| {{Flag\|France}} \| \|
Titanites (Paratitanites) \| Subgen. et sp. nov \| Valid \| Kiselev in Kiselev & Rogov \| Late Jurassic \| \| {{Flag\|Russia}} ({{Flag\|Ulyanovsk Oblast}} {{Flag\|Yaroslavl Oblast}}) \| The type species of the subgenus is Titanites (Paratitanites) manipulocostatus. \|
Titanites (Pseudogalbanites) \| Subgen. et sp. et comb. nov \| Valid \| Kiselev in Kiselev & Rogov \| Late Jurassic \| \| {{Flag\|Russia}} ({{Flag\|Yaroslavl Oblast}}) \| The type species of the subgenus is Titanites (Pseudogalbanites) triceps; the subgenus also includes "Kerberites" mosquensis Mikhailov (1957). \|
Tolimacoceras \| Gen. et comb. nov \| Valid \| Kennedy \| Late Cretaceous (Turonian) \| \| {{Flag\|Colombia}} \| A member of Vascoceratidae. A new genus for "Paramammites" colombianus Etayo-Serna (1979). \|
Toxancyloceras canuti{{Cite journal\|author1=Didier Bert \|author2=Stéphane Bersac \|author3=Josep Juárez-Ruiz \|author4=Zoë Hughes \|year=2018 \|title=Size reduction and ornamental oscillation within a Barremian lineage of giant heteromorphic ammonites (Early Cretaceous, northwestern Tethyan margin) \|journal=Cretaceous Research \|volume=88 \|pages=173–186 \|doi=10.1016/j.cretres.2017.02.001 \|bibcode=2018CrRes..88..173B \|s2cid=132281400 \|url=https://hal-insu.archives-ouvertes.fr/insu-01461722/file/bert-Cret-Res-2017-accepted.pdf }} \| Sp. nov \| Valid \| Bert et al. \| Early Cretaceous (Barremian) \| \| {{Flag\|France}} {{Flag\|Spain}} \| A member of Ancyloceratidae. \|
Transcaspiites transitionis \| Sp. nov \| Valid \| Mitta \| Early Cretaceous \| \| {{Flag\|Russia}} \| A member of the family Himalayitidae. \|
Transcaspiites tscheffkini \| Sp. nov \| Valid \| Mitta \| Early Cretaceous \| \| {{Flag\|Russia}} \| A member of the family Himalayitidae. \|
Ussuridiscus ornatus \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Lower Ceratite Limestone \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Mullericeratidae. \|
Ussuridiscus ventriosus \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| Lower Ceratite Limestone \| {{Flag\|India}} {{Flag\|Pakistan}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Mullericeratidae. \|
Valdedorsella kasei \| Sp. nov \| Valid \| Obata & Matsukawa \| Early Cretaceous \| Miyako Group \| {{Flag\|Japan}} \| \|
Vavilovites meridialis \| Sp. nov \| Valid \| Ware & Bucher in Ware et al. \| Early Triassic \| \| {{Flag\|India}} \| A member of Ceratitida belonging to the group Meekocerataceae and the family Paranoritidae. \|
Vocontiiceras{{Cite journal\|author1=Frédéric Diebold \|author2=Peter Bengtson \|author3=Cyril Baudouin \|author4=Karl-Armin Tröger \|author5=Jacqueline A. Lees \|author6=Didier Bert \|year=2018 \|title=The upper Turonian (Cretaceous) Prionocyclus germari Zone of the Vocontian Basin, France, with description of Vocontiiceras vocontiense nov. gen. et sp. (Collignoniceratidae, Ammonoidea) \|journal=Cretaceous Research \|volume=88 \|pages=375–383 \|doi=10.1016/j.cretres.2017.10.016 \|bibcode=2018CrRes..88..375D \|s2cid=134493913 }} \| Gen. et sp. nov \| Valid \| Diebold et al. \| Late Cretaceous (Turonian) \| Vocontian Basin \| {{Flag\|France}} \| A member of the family Collignoniceratidae. Genus includes new species V. vocontiense. \|
Zittelites \| Nom. nov \| Valid \| Énay in Énay & Howarth \| Late Jurassic \| \| {{Flag\|Spain}} \| A replacement name for Zittelia Tavera Benitez (1985). The type species is "Ammonites" eudichotomus Zittel (1868). \|

Other cephalopods

=Research=

A study on the relationship between egg size, maximum size of embryonic shells and the size of the initial chamber in extant cephalopods, and on its implications for inferring reproductive strategies of fossil cephalopods, is published by Laptikhovsky, Nikolaeva & Rogov (2018).{{Cite journal|author1=Vladimir Laptikhovsky |author2=Svetlana Nikolaeva |author3=Mikhail Rogov |year=2018 |title=Cephalopod embryonic shells as a tool to reconstruct reproductive strategies in extinct taxa |journal=Biological Reviews |volume=93 |issue=1 |pages=270–283 |doi=10.1111/brv.12341 |pmid=28560755 |s2cid=30926519 |doi-access=free }}
Mironenko (2018) proposes a new hypothesis about the habits and feeding strategies of endocerids, interpreting them as planktotrophic cephalopods, and arguing that the largest of endocerids were suspension feeders.{{cite journal |author=Aleksandr A. Mironenko |year=2018 |title=Endocerids: suspension feeding nautiloids? |journal=Historical Biology: An International Journal of Paleobiology |volume=32 |issue=2 |pages=281–289 |doi=10.1080/08912963.2018.1491565 |s2cid=89799876 }}
Antarcticeras nordenskjoeldi Doguzhaeva in Doguzhaeva et al. (2017), originally assigned to a new cephalopod subclass Paracoleoidea and the new order Antarcticerida, is reinterpreted as a possible member of Oegopsida by Fuchs, Keupp & Klug (2018);{{cite journal |author1=Dirk Fuchs |author2=Helmut Keupp |author3=Christian Klug |year=2018 |title=A critical review of Antarcticeras Doguzhaeva, 2017 – teuthid affinities can explain the poorly mineralized phragmocone |journal=Historical Biology: An International Journal of Paleobiology |volume=32 |issue=1 |pages=49–54 |doi=10.1080/08912963.2018.1467905 |s2cid=90739256 }} this reinterpretation is subsequently criticized and rejected by Doguzhaeva (2018).{{cite journal |author=Larisa A. Doguzhaeva |year=2018 |title=An early Eocene Antarcticeras nordenskjoeldi: the analysis of the 'oegopsid coleoid' hypothesis |journal=Historical Biology: An International Journal of Paleobiology |volume=32 |issue=3 |pages=339–345 |doi=10.1080/08912963.2018.1491569 |s2cid=90213789 }}
A study on the changes of body size of orthoconic cephalopods known from late Silurian to late Devonian sediments in Morocco is published by Pohle & Klug (2018).{{Cite journal|author1=Alexander Pohle |author2=Christian Klug |year=2018 |title=Body size of orthoconic cephalopods from the late Silurian and Devonian of the Anti-Atlas (Morocco) |journal=Lethaia |volume=51 |issue=1 |pages=126–148 |doi=10.1111/let.12234 |bibcode=2018Letha..51..126P |s2cid=135182773 |url=https://www.zora.uzh.ch/id/eprint/138591/8/2017_PohleKlug_SGM2017_BodySizeOrthoconicCephalopods-3.pdf }}
De Baets & Munnecke (2018) report presence of bimineralic, partially calcitic shell in two orthoconic nautiloids (members of the genus Dawsonoceras from the Silurian of Sweden, and members of the genus Spyroceras from the Devonian of Morocco), unlike extant and some fossil shelled cephalopods with an aragonitic shell wall, but similar to shells of some bivalves and gastropods.{{Cite journal|author1=Kenneth De Baets |author2=Axel Munnecke |year=2018 |title=Evidence for Palaeozoic orthoconic cephalopods with bimineralic shells |journal=Palaeontology |volume=61 |issue=2 |pages=173–181 |doi=10.1111/pala.12343 |doi-access=free |bibcode=2018Palgy..61..173D }}
A study on the belemnites from the Lower Jurassic localities in Buttenheim (Germany) and Lixhausen (France), focusing on changes in spacing of septa that divided the phragmocone into chambers during the animals' growth, as well as their implications for the anatomy of belemnite hatchlings, is published by Wani et al. (2018).{{Cite journal|author1=Ryoji Wani |author2=Amane Tajika |author3=Kenji Ikuno |author4=Tetsuro Iwasaki |year=2018 |title=Ontogenetic trajectories of septal spacing in Early Jurassic belemnites from Germany and France, and their palaeobiological implications |journal=Palaeontology |volume=61 |issue=1 |pages=77–88 |doi=10.1111/pala.12327 |bibcode=2018Palgy..61...77W |s2cid=89877678 }}
A study on belemnite rostra from two Toarcian belemnite battlefields in the Buttenheim and Teufelsgraben localities (Franconia, Germany), examining whether a rostrum size difference can be recognized between the studied samples, is published by Rita, De Baets & Schlott (2018).{{cite journal |author1=Patrícia Rita |author2=Kenneth De Baets |author3=Martina Schlott |year=2018 |title=Rostrum size differences between Toarcian belemnite battlefields |journal=Fossil Record |volume=21 |issue=1 |pages=171–182 |doi=10.5194/fr-21-171-2018 |doi-access=free |bibcode=2018FossR..21..171R }}
A pathological belemnite rostrum, indicative of the presence of a parasite during the lifetime of the belemnite, is described from the Cretaceous (Santonian) Bavnodde Greensand (Denmark) by Hoffmann et al. (2018).{{Cite journal|author1=René Hoffmann |author2=Jörg Ansorge |author3=Hendrik Wesendonk |author4=Kevin Stevens |year=2018 |title=A Late Cretaceous pathological belemnite rostrum with evidence of infection by an endoparasite |journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen |volume=287 |issue=3 |pages=335–349 |doi=10.1127/njgpa/2018/0720 }}
A study on the taxonomy, stratigraphy and palaeobiogeography of the late early Maastrichtian Belemnella lineage from the eastern part of the Roztocze Hills (Poland), comparing it with forms known from western Europe and easterly areas as far the peri-Aralian Sea area of Kazakhstan, and assessing their implications for inferring the taxonomic diversification and possible migratory patterns of members of the genus Belemnella in general, is published by Remin (2018).{{Cite journal|author=Zbyszek Remin |year=2018 |title=Understanding coleoid migration patterns between eastern and western Europe – belemnite faunas from the upper lower Maastrichtian of Hrebenne, southeast Poland |journal=Cretaceous Research |volume=87 |pages=368–384 |doi=10.1016/j.cretres.2017.06.010 |bibcode=2018CrRes..87..368R |s2cid=134908025 }}
The oldest known fossil ink sac of the cuttlefish belonging to the genus Sepia, preserving original eumelanin and melanosomes, is described from the Miocene (Serravallian) deposits of the Vienna Basin by Košťák et al. (2018).{{Cite journal|author1=Martin Košťák |author2=Ján Schlögl |author3=Adam Culka |author4=Adam Tomašových |author5=Martin Mazuch |author6=Natália Hudáčková |year=2018 |title=The unique preservation of Sepia soft tissues in the Miocene deposits (Serravalian, Vienna Basin): Implications for the origin of microbodies in the fossil record |journal=Palaeogeography, Palaeoclimatology, Palaeoecology |volume=493 |pages=111–118 |doi=10.1016/j.palaeo.2018.01.005 |bibcode=2018PPP...493..111K }}
Janiszewska et al. (2018) report aragonite preservation in ammonite and nautilid specimens from Upper Cretaceous siliceous limestone sections in Poland and Ukraine, and illustrate a broad spectrum of preservation of originally aragonitic structures in these specimens.{{Cite journal|author1=Katarzyna Janiszewska |author2=Maciej Mazur |author3=Marcin Machalski |author4=Jarosław Stolarski |year=2018 |title=From pristine aragonite to blocky calcite: Exceptional preservation and diagenesis of cephalopod nacre in porous Cretaceous limestones |journal=PLOS ONE |volume=13 |issue=12 |pages=e0208598 |doi=10.1371/journal.pone.0208598 |pmid=30566495 |pmc=6300390 |bibcode=2018PLoSO..1308598J |doi-access=free }}

=New taxa=

Name ! Novelty ! Status ! Authors ! Age ! Unit ! Location ! Notes ! Images
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Acanthoteuthis foliorostris{{Cite journal\|author=A. P. Ippolitov \|year=2018 \|title=Lower Bathonian belemnites and biostratigraphy of the central and southern parts of the East European Platform: Part 2. Cylindroteuthididae and Belemnotheutididae \|journal=Stratigraphy and Geological Correlation \|volume=26 \|issue=4 \|pages=433–458 \|doi=10.1134/S0869593818040020 \|bibcode=2018SGC....26..433I \|s2cid=134298256 }} \| Sp. nov \| Valid \| Ippolitov \| Middle Jurassic (Bathonian) \| \| {{Flag\|Russia}} \| A belemnite belonging to the family Belemnotheutididae. \|
Aphyctoceras friesenbichlerae{{Cite journal\|author1=Alexander Pohle \|author2=Christian Klug \|year=2018 \|title=Early and Middle Devonian cephalopods from Hamar Laghdad (Tafilalt, Morocco) and remarks on epicoles and cameral deposits \|journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen \|volume=290 \|issue=1–3 \|pages=203–240 \|doi=10.1127/njgpa/2018/0776 \|s2cid=135053653 }} \| Sp. nov \| Valid \| Pohle & Klug \| Devonian (early Eifelian) \| \| {{Flag\|Morocco}} \| A nautiloid cephalopod belonging to the family Rutoceratidae. \|
Arbuckleoceras{{cite journal \|author1=Shuji Niko \|author2=Barbara Seuss \|author3=Royal H. Mapes \|year=2018 \|title=Desmoinesian (Middle Pennsylvanian) orthocerid cephalopods from the Buckhorn Asphalt Lagerstätte in Oklahoma, Midcontinent North America \|journal=Paleontological Research \|volume=22 \|issue=1 \|pages=20–36 \|doi=10.2517/2017PR008 \|s2cid=135090100 }} \| Gen. et comb. nov \| Valid \| Niko, Seuss & Mapes \| Carboniferous (middle Pennsylvanian) \| Boggy Formation \| {{Flag\|United States}} ({{Flag\|Oklahoma}}) \| A member of Orthocerida. Genus includes A. tricamerae (Smith). \|
Armenoceras xizangense{{Cite journal\|author1=Xiang Fang \|author2=Tingen Chen \|author3=Clive Burrett \|author4=Yongsheng Wang \|author5=Yonggui Qu \|author6=Chunzi Zheng \|author7=Yunbai Zhang \|author8=Yuandong Zhang \|author9=Wenjie Li \|year=2018 \|title=Middle Ordovician actinocerid nautiloids (Cephalopoda) from Xainza County, Tibet, western China, and their paleogeographic implications \|journal=Journal of Paleontology \|volume=92 \|issue=3 \|pages=398–411 \|doi=10.1017/jpa.2017.152 \|bibcode=2018JPal...92..398F \|s2cid=133778974 }} \| Sp. nov \| Valid \| Fang et al. \| Middle Ordovician \| Lhasai Formation \| {{Flag\|China}} \| \|
Astoceras floweri \| Sp. nov \| Valid \| Pohle & Klug \| Devonian (late Emsian) \| \| {{Flag\|Morocco}} \| A member of Orthocerida belonging to the family Sichuanoceratidae. \|
Barskovisella{{Cite journal\|author=A. P. Ippolitov \|year=2018 \|title=Lower Bathonian belemnites and biostratigraphy of the central and southern parts of the East European Platform: Part 1. Megateuthididae \|journal=Stratigraphy and Geological Correlation \|volume=26 \|issue=2 \|pages=179–205 \|doi=10.1134/S0869593818020041 \|bibcode=2018SGC....26..179I \|s2cid=133823133 }} \| Gen. et 6 sp. et comb. nov \| Valid \| Ippolitov \| Middle Jurassic (Bathonian) \| \| {{Flag\|Poland}} {{Flag\|Russia}} {{Flag\|Switzerland}} \| A belemnite belonging to the family Megateuthididae. The type species is B. issae; genus also includes B. pseudoishmensis, B. variabilis, B. barskovi, B. gracilis and B. renegata, as well as "Mesoteuthis" bajosicus Ivanova (1959) and "Nannobelus" parabellus Barskov in Mitta et al. (2004). \|
Calliconites? shimizui{{Cite journal\|author1=Shuji Niko \|author2=Masayuki Ehiro \|year=2018 \|title=Aulacocerid coleoids from the Triassic of the South Kitakami Belt, Northeast Japan \|journal=Bulletin of the Tohoku University Museum \|volume=17 \|pages=1–8 \|hdl=10097/00128633 }} \| Sp. nov \| Valid \| Niko & Ehiro \| Early Triassic (Olenekian) \| Osawa Formation \| {{Flag\|Japan}} \| A member of Aulacocerida belonging to the family Xiphoteuthididae. \|
Castellanibelus vaubellensis{{Cite journal \|author=Nico M.M. Janssen \|year=2018 \|title=Valanginian belemnites: New taxonomical and stratigraphical observations \|journal=Carnets de Géologie \|volume=18 \|issue=7 \|pages=167–181 \|doi=10.4267/2042/68153 \|doi-access=free }} \| Sp. nov \| Valid \| Janssen \| Early Cretaceous (Valanginian) \| \| {{Flag\|France}} {{Flag\|Spain}} {{Flag\|Switzerland}} \| A belemnite belonging to the family Duvaliidae. \|
Challinoria{{Cite journal\|author1=Alexei P. Ippolitov \|author2=Bhawanisingh G. Desai \|year=2018 \|title=Dwarf megateuthidid belemnites from the Bathonian of Kachchh (India: Gujarat) and their significance for palaeobiogeography \|journal=Journal of Systematic Palaeontology \|volume=17 \|issue=8 \|pages=613–634 \|doi=10.1080/14772019.2018.1448471 \|s2cid=90340555 }} \| Gen. et sp. nov \| Valid \| Ippolitov & Desai \| Middle Jurassic (Bathonian) \| \| {{Flag\|India}} \| A belemnite belonging to the family Megateuthididae. Genus includes new species C. challinori. \|
Colorthoceras{{cite journal \|author1=Harry Mutvei \|author2=Royal H. Mapes \|year=2018 \|title=Carboniferous coleoids with mixed coleoid-orthocerid characteristics: a new light on cephalopod evolution \|journal=GFF \|volume=140 \|issue=1 \|pages=11–24 \|doi=10.1080/11035897.2018.1429490 \|bibcode=2018GFF...140...11M \|s2cid=134894299 }}{{cite journal \|author=Harry Mutvei \|year=2018 \|title=Cameral deposits in Paleozoic cephalopods \|journal=GFF \|volume=140 \|issue=3 \|pages=254–263 \|doi=10.1080/11035897.2018.1483966 \|bibcode=2018GFF...140..254M \|s2cid=133926140 }} \| Gen. et 3 sp. nov \| Valid \| Mutvei & Mapes \| Carboniferous (Gzhelian) \| Graham Formation \| {{Flag\|United States}} ({{Flag\|Texas}}) \| A coleoid with mixed orthocerid-coleoid characteristics. The type species is C. inflata; genus also includes new species C. tubulata and C. concavus. \|
Cyclopoceras{{Cite journal\|author=Aleksandr A. Mironenko \|year=2018 \|title=First possible evidence of parasite infestation in Upper Devonian Discosorida (Nautiloidea) \|journal=Swiss Journal of Palaeontology \|volume=137 \|issue=1 \|pages=77–82 \|doi=10.1007/s13358-018-0150-4 \|bibcode=2018SwJP..137...77M \|s2cid=133918395 }} \| Nom. nov \| Valid \| Mironenko \| Devonian \| \| {{Flag\|Russia}} \| A member of Discosorida belonging to the family Taxyceratidae; a replacement name for Cyclopites Zhuravleva (1962). The type species is "Gomphoceras" cyclops Wenjukoff (1886). \|
Cylindroteuthis gelida{{Cite journal\|author1=Oksana S. Dzyuba \|author2=Benoît de Lagausie \|year=2018 \|title=New belemnites (Megateuthididae, Cylindroteuthididae) from the Bajocian and Bathonian of the Yuryung-Tumus Peninsula, northern Siberia, Russia and their palaeobiogeographic implications \|journal=PalZ \|volume=92 \|issue=1 \|pages=87–105 \|doi=10.1007/s12542-017-0380-6 \|bibcode=2018PalZ...92...87D \|s2cid=135035144 }} \| Sp. nov \| Valid \| de Lagausie in Dzyuba & de Lagausie \| Middle Jurassic (Bajocian) \| Yuryung-Tumus Formation \| {{Flag\|Russia}} \| A belemnite belonging to the family Cylindroteuthididae. \|
Discoceras lindstroemi{{Cite journal\|author1=Štěpán Manda \|author2=Vojtěch Turek \|year=2018 \|title=Silurian tarphycerid Discoceras (Cephalopoda, Nautiloidea): systematics, embryonic development and paleoecology \|journal=Journal of Paleontology \|volume=92 \|issue=3 \|pages=412–431 \|doi=10.1017/jpa.2017.122 \|bibcode=2018JPal...92..412M \|s2cid=135118720 }} \| Sp. nov \| Valid \| Manda & Turek \| Silurian (Wenlock) \| \| {{Flag\|Sweden}} \| \|
Discoceras stridsbergi \| Sp. nov \| Valid \| Manda & Turek \| Silurian (Wenlock) \| \| {{Flag\|Sweden}} \| \|
Dolorthoceras boggyense \| Sp. nov \| Valid \| Niko, Seuss & Mapes \| Carboniferous (middle Pennsylvanian) \| Boggy Formation \| {{Flag\|United States}} ({{Flag\|Oklahoma}}) \| \|
Duvalia crassa \| Sp. nov \| Valid \| Janssen \| Early Cretaceous (Valanginian) \| \| {{Flag\|Bulgaria}} {{Flag\|France}} {{Flag\|Slovakia}} {{Flag\|Spain}} {{Flag\|Switzerland}} \| A belemnite belonging to the family Duvaliidae. \|
Duvalia elongata \| Sp. nov \| Valid \| Janssen \| Early Cretaceous (Valanginian) \| \| {{Flag\|France}} {{Flag\|Spain}} {{Flag\|Switzerland}} \| A belemnite belonging to the family Duvaliidae. \|
Duvalia kleini \| Sp. nov \| Valid \| Janssen \| Early Cretaceous (Valanginian) \| \| {{Flag\|France}} {{Flag\|Romania}} {{Flag\|Spain}} \| A belemnite belonging to the family Duvaliidae. \|
Duvalia superconstricta \| Sp. nov \| Valid \| Janssen \| Early Cretaceous (Valanginian) \| \| Crimean Peninsula {{Flag\|France}} {{Flag\|Spain}} {{Flag\|Switzerland}} {{Flag\|Hungary}}? \| A belemnite belonging to the family Duvaliidae. \|
Eocylindroteuthis gracilenta{{Cite journal\|author1=Oksana S. Dzyuba \|author2=Cynthia D. Schraer \|author3=Chad P. Hults \|author4=Robert B. Blodgett \|author5=David J. Schraer \|year=2018 \|title=Early Bajocian belemnites of Southcentral Alaska: new data and new perspectives on mid-Middle Jurassic Megateuthididae and Belemnopseidae biogeography \|journal=Journal of Systematic Palaeontology \|volume=17 \|issue=11 \|pages=911–935 \|doi=10.1080/14772019.2018.1486335 \|s2cid=92391994 }} \| Sp. nov \| Valid \| Dzyuba & Schraer in Dzyuba et al. \| Middle Jurassic (Bajocian) \| \| {{Flag\|United States}} ({{Flag\|Alaska}}) \| A belemnite. \|
Eocylindroteuthis mariottii{{Cite journal\|author=A. P. Ippolitov \|year=2018 \|title=Marine early Bajocian deposits of the Lower Volga Region (Volgograd Region) and their belemnite-based stratigraphy \|journal=Stratigraphy and Geological Correlation \|volume=26 \|issue=3 \|pages=298–332 \|doi=10.1134/S0869593818030073 \|bibcode=2018SGC....26..298I \|s2cid=135144616 }} \| Sp. nov \| Valid \| Ippolitov \| Middle Jurassic (Bajocian) \| \| {{Flag\|Russia}} ({{Flag\|Volgograd Oblast}}) \| A belemnite. \|
Eocylindroteuthis riegrafi \| Sp. nov \| Valid \| Dzyuba & Schraer in Dzyuba et al. \| Middle Jurassic (Bajocian) \| \| {{Flag\|United States}} ({{Flag\|Alaska}}) \| A belemnite. \|
Eocylindroteuthis weisi \| Sp. nov \| Valid \| Ippolitov \| Middle Jurassic (Bajocian) \| \| {{Flag\|Russia}} ({{Flag\|Volgograd Oblast}}) \| A belemnite. \|
Eocylindroteuthis yarkovi \| Sp. nov \| Valid \| Ippolitov \| Middle Jurassic (Bajocian) \| \| {{Flag\|Russia}} ({{Flag\|Volgograd Oblast}}) \| A belemnite. \|
Geidoloceras hebeiseni \| Sp. nov \| Valid \| Pohle & Klug \| Devonian (Pragian) \| \| {{Flag\|Morocco}} \| A member of Pseudorthocerida belonging to the family Pseudorthoceratidae. \|
Hastites orphana \| Sp. nov \| Valid \| Ippolitov \| Middle Jurassic (Bajocian) \| \| {{Flag\|Russia}} ({{Flag\|Volgograd Oblast}}) \| A belemnite. \|
"Hibolithes" lebresensis \| Sp. nov \| Valid \| Janssen \| Early Cretaceous (Valanginian) \| Vocontian Basin \| {{Flag\|France}} \| A belemnite belonging to the family Belemnopseidae. \|
Homaloteuthis volgogradensis \| Sp. nov \| Valid \| Ippolitov \| Middle Jurassic (Bajocian) \| \| {{Flag\|Russia}} ({{Flag\|Volgograd Oblast}}) \| A belemnite. \|
Idahoteuthis{{cite journal \|author1=Larisa A. Doguzhaeva \|author2=Arnaud Brayard \|author3=Nicolas Goudemand \|author4=Laurel J. Krumenacker \|author5=James F. Jenks \|author6=Kevin G. Bylund \|author7=Emmanuel Fara \|author8=Nicolas Olivier \|author9=Emmanuelle Vennin \|author10=Gilles Escarguel \|year=2018 \|title=An Early Triassic gladius associated with soft tissue remains from Idaho, USA—a squid-like coleoid cephalopod at the onset of Mesozoic Era \|journal=Acta Palaeontologica Polonica \|volume=63 \|issue=2 \|pages=341–355 \|doi=10.4202/app.00393.2017 \|doi-access=free }} \| Gen. et sp. nov \| Valid \| Doguzhaeva & Brayard in Doguzhaeva et al. \| Early Triassic (Olenekian) \| Thaynes Group \| {{Flag\|United States}} ({{Flag\|Idaho}}) \| A member of Coleoidea, possibly belonging to the order Myopsida. The type species is I. parisiana. \|
Infundibuloceras kroegeri \| Sp. nov \| Valid \| Pohle & Klug \| Devonian (Emsian) \| \| {{Flag\|Morocco}} \| A member of Orthocerida belonging to the family Orthoceratidae. \|
Mesonaedyceras \| Gen. et sp. nov \| Valid \| Pohle & Klug \| Devonian (Eifelian) \| \| {{Flag\|Morocco}} \| A member of Oncocerida belonging to the family Naedyceratidae. Genus includes new species M. laterobliquum. \|
Miyagiteuthis \| Gen. et comb. nov \| Valid \| Niko & Ehiro \| Late Triassic (early Norian) \| Chonomori Formation \| {{Flag\|Japan}} \| A member of Aulacocerida belonging to the family Aulacoceratidae. The type species is "Dictyoconites" nipponicus Shimizu & Mabuti (1941). \|
Nebraskaconus{{Cite journal\|author1=Royal H. Mapes \|author2=Larisa A. Doguzhaeva \|year=2018 \|title=New Pennsylvanian coleoids (Cephalopoda) from Nebraska and Iowa, USA \|journal=Journal of Paleontology \|volume=92 \|issue=2 \|pages=146–156 \|doi=10.1017/jpa.2017.79 \|bibcode=2018JPal...92..146M \|s2cid=134287813 }} \| Gen. et sp. nov \| Valid \| Mapes & Doguzhaeva \| Carboniferous (Kasimovian) \| Stark Shale \| {{Flag\|United States}} ({{Flag\|Nebraska}}) \| A member of Coleoidea. Genus includes new species N. whitei. \|
Oklaconus{{Cite journal\|author1=Larisa A. Doguzhaeva \|author2=Royal H. Mapes \|year=2018 \|title=A new late Carboniferous coleoid from Oklahoma, USA: implications for the early evolutionary history of the subclass Coleoidea (Cephalopoda) \|journal=Journal of Paleontology \|volume=92 \|issue=2 \|pages=157–169 \|doi=10.1017/jpa.2017.81 \|bibcode=2018JPal...92..157D \|s2cid=134415892 }} \| Gen. et sp. nov \| Valid \| Doguzhaeva & Mapes \| Carboniferous (Moscovian) \| Wewoka Shale \| {{Flag\|United States}} ({{Flag\|Oklahoma}}) \| A bactritoid-like coleoid. Genus includes new species O. okmulgeensis. \|
Pabianiconus \| Gen. et sp. nov \| Valid \| Mapes & Doguzhaeva \| Carboniferous (Kasimovian) \| Stark Shale \| {{Flag\|United States}} ({{Flag\|Nebraska}}) \| A member of Coleoidea. Genus includes new species P. starkensis. \|
Pachtoceras laghdadense \| Sp. nov \| Valid \| Pohle & Klug \| Devonian (late Givetian) \| \| {{Flag\|Morocco}} \| A member of Oncocerida belonging to the family Poterioceratidae. \|
Pachyteuthis mittai \| Sp. nov \| Valid \| Ippolitov \| Middle Jurassic (Bathonian) \| \| {{Flag\|Russia}} \| A belemnite belonging to the family Cylindroteuthididae. \|
Paramegateuthis ovata \| Sp. nov \| Valid \| de Lagausie & Dzyuba in Dzyuba & de Lagausie \| Middle Jurassic (Bajocian) \| Yuryung-Tumus Formation \| {{Flag\|Norway}} {{Flag\|Russia}} \| A belemnite belonging to the family Megateuthididae. \|
Paramegateuthis schurygini \| Sp. nov \| Valid \| Dzyuba in Dzyuba & de Lagausie \| Middle Jurassic (Bathonian) \| Yuryung-Tumus Formation \| {{Flag\|Russia}} \| A belemnite belonging to the family Megateuthididae. \|
Parapassaloteuthis francoizbreutae{{Cite journal\|author1=Robert Weis \|author2=Nino Mariotti \|year=2018 \|title=Parapassaloteuthis francoizbreutae, a new belemnite species from the Bifrons Chronozone (Toarcian, Lower Jurassic) of NW France \|journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen \|volume=288 \|issue=3 \|pages=243–250 \|doi=10.1127/njgpa/2018/0738 \|s2cid=133821353 }} \| Sp. nov \| Valid \| Weis & Mariotti \| Early Jurassic (Toarcian) \| \| {{Flag\|France}} \| A belemnite. \|
Patelloctopus{{Cite journal\|author1=Dirk Fuchs \|author2=Günter Schweigert \|year=2018 \|title=First Middle–Late Jurassic gladius vestiges provide new evidence on the detailed origin of incirrate and cirrate octopuses (Coleoidea) \|journal=PalZ \|volume=92 \|issue=2 \|pages=203–217 \|doi=10.1007/s12542-017-0399-8 \|bibcode=2018PalZ...92..203F \|s2cid=135245479 }} \| Gen. et sp. nov \| Valid \| Fuchs & Schweigert \| Late Jurassic (Kimmeridgian) \| Nusplingen Limestone \| {{Flag\|Germany}} \| A member of the stem group of the Octopoda or a stem-incirrate. Genus includes new species P. ilgi. \|
Phatthalungoceras{{Cite journal\|author1=Kittichai Tongtherm \|author2=Jaruwat Nabhitabhata \|year=2018 \|title=Phatthalungoceras srisuki a new genus and species of Triassic nautiloid cephalopod (Cephalopoda, Orthoceratoidea, Orthoceratidae) from eastern peninsular Thailand \|journal=Phuket Marine Biological Center Research Bulletin \|volume=75 \|pages=13–18 \|url=https://www.researchgate.net/publication/330440492 }} \| Gen. et sp. nov \| Valid \| Tongtherm & Nabhitabhata \| Middle Triassic (Anisian) \| Chaiburi Formation \| {{Flag\|Thailand}} \| A member of the family Orthoceratidae. The type species is P. srisuki. \|
Pseudendoplectoceras angustum \| Sp. nov \| Valid \| Pohle & Klug \| Devonian (Pragian) \| \| {{Flag\|Morocco}} \| A member of Discosorida belonging to the family Phragmoceratidae. \|
Pseudosimobelus \| Gen. et sp. nov \| Valid \| Dzyuba & Schraer in Dzyuba et al. \| Middle Jurassic (Bajocian) \| \| {{Flag\|United States}} ({{Flag\|Alaska}}) \| A belemnite. Genus includes new species P. tuxedniensis. \|
Sepia fabianschwankei{{Cite journal\|author1=Martin Košták \|author2=John W.M. Jagt \|year=2018 \|title=A new species of Sepia (Cephalopoda, Coleoidea) from the Miocene of northwest Germany: a contribution to sepiid palaeobiogeography \|journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen \|volume=288 \|issue=3 \|pages=273–281 \|doi=10.1127/njgpa/2018/0741 \|s2cid=134955711 }} \| Sp. nov \| Valid \| Košták & Jagt \| Miocene \| Twistringen Beds \| {{Flag\|Germany}} \| A species of Sepia. \|
Smithorthoceras \| Gen. et comb. nov \| Valid \| Niko, Seuss & Mapes \| Carboniferous (middle Pennsylvanian) \| Boggy Formation \| {{Flag\|United States}} ({{Flag\|Oklahoma}}) \| A member of Orthocerida. Genus includes S. unicamera (Smith). \|
Starkites \| Gen. et sp. nov \| Valid \| Mapes & Doguzhaeva \| Carboniferous (Kasimovian) \| Stark Shale \| {{Flag\|United States}} ({{Flag\|Nebraska}}) \| A member of Coleoidea. Genus includes new species S. compressus. \|
Subormoceras asymmetricum \| Sp. nov \| Valid \| Pohle & Klug \| Devonian (Pragian) \| \| {{Flag\|Morocco}} \| A member of Pseudorthocerida belonging to the family Pseudorthoceratidae. \|
Subtheoceras \| Gen. et sp. nov \| Valid \| Pohle & Klug \| Devonian (Pragian) \| \| {{Flag\|Morocco}} \| A member of Orthocerida belonging to the family Orthoceratidae. Genus includes new species S. striatum. \|
Sulphurnites \| Gen. et sp. nov \| Valid \| Niko, Seuss & Mapes \| Carboniferous (middle Pennsylvanian) \| Boggy Formation \| {{Flag\|United States}} ({{Flag\|Oklahoma}}) \| A member of Orthocerida. Genus includes new species S. taffi. \|
Unklesbayoceras \| Gen. et sp. nov \| Valid \| Niko, Seuss & Mapes \| Carboniferous (middle Pennsylvanian) \| Boggy Formation \| {{Flag\|United States}} ({{Flag\|Oklahoma}}) \| A member of Orthocerida. Genus includes new species U. striatulum. \|

Gastropods

=Research=

A study on the evolutionary history of endemic genera of Late Cretaceous shallow-marine gastropods from the rim of the Northeast Pacific (a region extending from the Alaska Peninsula southward to the northern part of Baja California Sur, Mexico) is published by Squires (2018).{{Cite journal|author=Richard L. Squires |year=2018 |title=Late Cretaceous endemic shallow-marine gastropod genera of the northeast Pacific: biodiversity and faunal changes |journal=PaleoBios |volume=35 |pages=ucmp_paleobios_40741 |url=https://escholarship.org/uc/item/2bk874nr }}
New fossil material of "Pleurotomaria" perlata is described from the Silurian Niagara Group (Ohio, United States) by Peel (2018), who interprets new fossils as indicating that "P." perlata wasn't a pleurotomariid vetigastropod, and transfers this species to the genus Isfarispira.{{Cite journal|author=John S. Peel |year=2018 |title=A new look at Pleurotomaria perlata Hall, 1852 (Gastropoda) from the Silurian of Laurentia |journal=GFF |volume=140 |issue=3 |pages=249–253 |doi=10.1080/11035897.2018.1482564 |s2cid=135054581 |doi-access=free |bibcode=2018GFF...140..249P }}
A study on the effect of climatic cooling on the cannibalistic behaviour of members of the genus Falsilunatia from the Eocene La Meseta Formation (Antarctica) is published by Dietl, Nagel-Myers & Aronson (2018).{{Cite journal|author1=Gregory P. Dietl |author2=Judith Nagel-Myers |author3=Richard B. Aronson |year=2018 |title=Indirect effects of climate change altered the cannibalistic behaviour of shell-drilling gastropods in Antarctica during the Eocene |journal=Royal Society Open Science |volume=5 |issue=10 |pages=181446 |doi=10.1098/rsos.181446 |pmid=30473865 |pmc=6227939 }}
A study on predatory traces in gastropod specimens collected from middle Eocene beds of the Paris Basin and the lower Miocene Chipola Formation in Florida, and on their implications for inferring possible correlations between the shell morphology and the vulnerability to predators in fossil marine gastropods, is published by Ishikawa, Kase & Tsutsui (2018).{{Cite journal|author1=Makiko Ishikawa |author2=Tomoki Kase |author3=Hidekazu Tsutsui |year=2018 |title=Deciphering deterministic factors of predation pressures in deep time |journal=Scientific Reports |volume=8 |issue=1 |pages=Article number 17532 |doi=10.1038/s41598-018-35505-1 |pmid=30510248 |pmc=6277388 |bibcode=2018NatSR...817532I }}

=New taxa=

Name ! Novelty ! Status ! Authors ! Age ! Unit ! Location ! Notes ! Images
class="wikitable sortable" align="center" width="100%"
Acirsa sceauxsensis{{Cite journal\|author1=Bernard Manuel Landau \|author2=Luc Ceulemans \|author3=Frank Van Dingenen \|year=2018 \|title=The upper Miocene gastropods of northwestern France, 2. Caenogastropoda \|journal=Cainozoic Research \|volume=18 \|issue=2 \|pages=177–368 \|url=https://www.researchgate.net/publication/329912521 }} \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Acirsa. \|
Adelphotectonica bieleri \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A member of the family Architectonicidae. \|
Aegopinella depressula{{Cite journal\|author1=Mathias Harzhauser \|author2=Thomas A. Neubauer \|year=2018 \|title=Opole (Poland) - a key locality for middle Miocene terrestrial mollusc faunas \|journal=Bulletin of Geosciences \|volume=93 \|issue=1 \|pages=71–146 \|doi=10.3140/bull.geosci.1692 \|doi-access=free }} \| Sp. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Poland}} \| A species of Aegopinella. \|
Allmoniella{{cite journal \|author1=Luc Dolin \|author2=David T. Dockery III \|year=2018 \|title=The Cypraeidae and Ovulidae (Mollusca; Caenogastropoda) from the Cook Mountain Formation (Bartonian, Middle Eocene) of the Gulf Coastal Plain, Southern United States: A province of unsuspected generic origins \|journal=Southeastern Geology \|volume=53 \|issue=1 \|pages=41–61 \|url=https://www.researchgate.net/publication/325952403 }} \| Gen. et sp. et comb. nov \| Valid \| Dolin & Dockery \| Eocene (Bartonian) \| Cook Mountain Formation \| {{Flag\|United States}} ({{Flag\|Louisiana}} {{Flag\|Mississippi}}) \| A member of Ovulidae. Genus includes new species A. magnolia, as well as "Cypraea" vaughani Johnson (1899). \|
Alvania acuticarinata \| Nom. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania; a replacement name for Delphinula carinata Millet (1854). \|
Alvania armata \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania couffoni \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania fezata \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania globosa \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania insulsa \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania josephineae \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania lachrimula \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania milleti \| Nom. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania; a replacement name for Rissoa suturalis Millet (1865). \|
Alvania milletispinosa \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania miocalasi \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania miolactea \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania napoleoni \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania parasusieae \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania redoniana \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania renauleauensis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania subtiliangulosa \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania susieae \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania tenuisculpturata \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Alvania turtaudierei \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Alvania. \|
Amalda acutapex \| Sp. nov \| Valid \| Raven & Recourt \| Miocene \| \| {{Flag\|Brunei}} \| A species of Amalda. \|
Amalda bruneiana{{Cite journal\|author1=Mathias Harzhauser \|author2=Han Raven \|author3=Bernard M. Landau \|author4=László Kocsis \|author5=Asiqqin Adnan \|author6=Martin Zuschin \|author7=Oleg Mandic \|author8=Antonino Briguglio \|year=2018 \|title=Late Miocene gastropods from northern Borneo (Brunei Darussalam, Seria Formation) \|journal=Palaeontographica Abteilung A \|volume=313 \|issue=1–3 \|pages=1–79 \|doi=10.1127/pala/2018/0077 \|bibcode=2018PalAA.313....1H \|s2cid=146378352 }} \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Amalda. \|
Amalda miriensis \| Sp. nov \| Valid \| Raven & Recourt \| Miocene \| \| {{Flag\|Malaysia}} \| A species of Amalda. \|
Angaria complanata{{Cite journal\|author1=Olivier Gain \|author2=Laurent Belliard \|author3=Jacques Le Renard \|year=2018 \|title=Les Angariidae (Mollusca, Gastropoda, Vetigastropoda) de l'Éocène Moyen du Cotentin (Manche, France) \|journal=Carnets de Voyages Paléontologiques dans le Bassin Anglo-Parisien \|volume=4 \|pages=1–46 \|isbn=978-2-9538000-4-3 }} \| Sp. nov \| Valid \| Gain, Belliard & Le Renard \| Eocene \| \| {{Flag\|France}} \| A species of Angaria. \|
Angaria constantinensis \| Sp. nov \| Valid \| Gain, Belliard & Le Renard \| Eocene \| \| {{Flag\|France}} \| A species of Angaria. \|
Angaria nigellensis \| Sp. nov \| Valid \| Gain, Belliard & Le Renard \| Eocene \| \| {{Flag\|France}} \| A species of Angaria. \|
Angaria scutellata \| Sp. nov \| Valid \| Gain, Belliard & Le Renard \| Eocene \| \| {{Flag\|France}} \| A species of Angaria. \|
Aphanitoma marqueti{{Cite journal\|author1=Luc Ceulemans \|author2=Frank Van Dingenen \|author3=Bernard Manuel Landau \|year=2018 \|title=The lower Pliocene gastropods of Le Pigeon Blanc (Loire- Atlantique, northwest France). Part 5 – Neogastropoda (Conoidea) and Heterobranchia (fine) \|journal=Cainozoic Research \|volume=18 \|issue=2 \|pages=89–176 \|url=https://www.researchgate.net/publication/329912517 }} \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Aphanitoma. \|
Aporrhais sauditica{{cite journal \|author1=Mariel Ferrari \|author2=Magdy El-Hedeny \|author3=Mohamed Zakhera \|author4=Ahmed El-Sabbagh \|author5=Saleh Al Farraj \|year=2018 \|title=Middle–Upper Jurassic marine gastropods from central Saudi Arabia \|journal=Alcheringa: An Australasian Journal of Palaeontology \|volume=42 \|issue=3 \|pages=383–401 \|doi=10.1080/03115518.2018.1465996 \|bibcode=2018Alch...42..383F \|hdl=11336/96342 \|s2cid=135070284 }} \| Sp. nov \| Valid \| Ferrari et al. \| Jurassic \| \| {{Flag\|Saudi Arabia}} \| A species of Aporrhais. \|
Archierato antonioi{{Cite journal\|author1=Dirk Fehse \|author2=Y. Villacampa \|year=2018 \|title=Contributions to the knowledge of the Eratoidae, XX: A new Archierato F. A. Schilder, 1933 from the Miocene of Florida, U.S.A. \|journal=Conchylia \|volume=49 \|issue=1–2 \|pages=25–28 }} \| Sp. nov \| Valid \| Fehse & Villacampa \| Miocene \| \| {{Flag\|United States}} ({{Flag\|Florida}}) \| A member of the family Eratoidae. \|
Archimediella sancticlementensis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| \|
Architectonica beetsi \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Architectonica. \|
Asthenotoma lanceolata \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Asthenotoma. \|
Ataxocerithium turbineum \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Ataxocerithium. \|
Athleta (Volutospina) delvallei{{Cite journal\|author1=Humberto Astibia \|author2=Didier Merle \|author3=Jean-Michel Pacaud \|author4=Javier Elorza \|author5=Aitor Payros \|year=2018 \|title=Gastropods and bivalves from the Eocene marly formations of the Pamplona Basin and surrounding areas (Navarre, western Pyrenees) \|journal=Geodiversitas \|volume=40 \|issue=11 \|pages=211–257 \|doi=10.5252/geodiversitas2018v40a11 \|s2cid=135416131 \|url=http://sciencepress.mnhn.fr/en/periodiques/geodiversitas/40/11 \|doi-access=free }} \| Sp. nov \| Valid \| Astibia, Merle & Pacaud in Astibia et al. \| Eocene (Bartonian-?early Priabonian) \| Ardanatz Sandstone Ilundain Marl Formation \| {{Flag\|Spain}} \| A species of Athleta. \|
Athleta nikolaji{{Cite journal\|author1=Kai Ingemann Schnetler \|author2=Mogens Stentoft Nielsen \|year=2018 \|title=A Palaeocene (Selandian) molluscan fauna from boulders of Kerteminde Marl in the gravel-pit at Gundstrup, Fyn, Denmark \|journal=Cainozoic Research \|volume=18 \|issue=1 \|pages=3–81 \|url=https://www.researchgate.net/publication/326149026 }} \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Athleta. \|
Bela falbalae \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Bela. \|
Bernaya amandula{{Cite journal\|author=Jean-Michel Pacaud \|year=2018 \|title=Bernaya amandula nov. sp., une espèce nouvelle de Cypraeidae (Mollusca, Gastropoda) du Bartonien (Éocène moyen) du bassin de Paris \|journal=Fossiles. Revue française de paléontologie \|volume=34 \|pages=52–57 \|url=https://www.researchgate.net/publication/325069866 }} \| Sp. nov \| Valid \| Pacaud \| Eocene (Bartonian) \| \| {{Flag\|France}} \| A species of Bernaya. \|
Biconomphalus{{Cite journal\|author=János Szabó \|year=2018 \|title=Gastropods of the Lower Jurassic Hierlatz Limestone Formation, part 4. New eucycloidean, trochoidean, neritimorph, and caenogastropod taxa in the fauna of the Hierlatz Alpe (Hallstatt, Austria) \|journal=Fragmenta Palaeontologica Hungarica \|volume=35 \|pages=61–84 \|doi=10.17111/FragmPalHung.2018.35.61 \|s2cid=216785436 \|url=http://real.mtak.hu/134277/1/Fragm_paleont_hung_2018_Vol_35_61.pdf }} \| Gen. et sp. nov \| Valid \| Szabó \| Early Jurassic (Sinemurian to Pliensbachian) \| Hierlatz Limestone \| {{Flag\|Austria}} \| A possible member of the family Eucyclidae. The type species is B. singularis. \|
Biomphalaria manya{{Cite journal\|author1=Fernanda Cabrera \|author2=Sergio Martínez \|year=2018 \|title=A new species of Biomphalaria Preston, 1910 (Gastropoda, Planorbidae) from the Upper Cretaceous of Uruguay \|journal=Revista Brasileira de Paleontologia \|volume=21 \|issue=3 \|pages=272–275 \|doi=10.4072/rbp.2018.3.08 \|doi-access=free }} \| Sp. nov \| Valid \| Cabrera & Martínez \| Late Cretaceous \| Queguay Formation \| {{Flag\|Uruguay}} \| A species of Biomphalaria. \|
Biplica paleocenica{{Cite journal\|author1=Kazutaka Amano \|author2=Robert G. Jenkins \|author3=Hiroshi Kurita \|year=2018 \|title=New and Mesozoic-relict mollusks from Paleocene wood-fall communities in Urahoro Town, eastern Hokkaido, northern Japan \|journal=Journal of Paleontology \|volume=92 \|issue=4 \|pages=634–647 \|doi=10.1017/jpa.2017.137 \|bibcode=2018JPal...92..634A \|s2cid=135287143 }} \| Sp. nov \| Valid \| Amano & Jenkins in Amano, Jenkins & Kurita \| Paleocene \| Katsuhira Formation \| {{Flag\|Japan}} \| \|
Bithynia erzurumensis{{Cite journal\|author1=Mathias Harzhauser \|author2=Thomas A. Neubauer \|author3=İzzet Hoşgör \|year=2018 \|title=Oligocene–Miocene freshwater gastropods from the Oltu-Narman Basin in eastern Turkey \|journal=Acta Palaeontologica Polonica \|volume=63 \|issue=2 \|pages=357–369 \|doi=10.4202/app.00469.2018 \|doi-access=free }} \| Sp. nov \| Valid \| Harzhauser, Neubauer & Hoşgör \| Late Oligocene or early Miocene \| Susuz Formation \| {{Flag\|Turkey}} \| A species of Bithynia. \|
Bittium crassum \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Bittium. \|
Bittium gallicum \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Bittium. \|
Bittium pingue \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Bittium. \|
Bittium renauleauense \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Bittium. \|
Boreocomitas inouei{{Cite journal\|author1=Kazutaka Amano \|author2=Krzysztof Hryniewicz \|author3=Robert G. Jenkins \|year=2018 \|title=A newly discovered Paleocene species of Boreocomitas (Gastropoda: Pseudomelatomidae) from eastern Hokkaido, Japan, with implications for the biogeography of the Paleocene Bering Strait \|journal=The Nautilus \|volume=132 \|issue=3–4 \|pages=117–123 \|url=https://www.researchgate.net/publication/329857611 }} \| Sp. nov \| Valid \| Amano, Hryniewicz & Jenkins \| Paleocene \| Katsuhira Formation \| {{Flag\|Japan}} \| A member of the family Pseudomelatomidae. \|
Borystheniella{{Cite journal\|author=Jean-Michel Pacaud \|year=2018 \|title=Les Cypraeoidea (Mollusca, Caenogastropoda) du Priabonien (Éocène supérieur) de Dnipro (Oblast de Dnipropetrovsk, Ukraine). Partie 1 : Cypraeidae \|journal=Xenophora Taxonomy \|volume=20 \|pages=14–33 \|url=https://www.researchgate.net/publication/323457380 }} \| Gen. et 3 sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| A member of the family Cypraeidae. The type species is B. incisa; genus also includes new species B. gracilenta and B. zamberlani. \|
Caballasea \| Gen. et sp et comb. nov \| Valid \| DeVries \| Early Paleogene \| Carroza Formation Pisco Basin (Caballas Formation) \| {{Flag\|Mexico}} {{Flag\|Peru}} \| The type species is C. segmentata; genus also includes "Pachychilus (Pachychiloides)" lawtoni Perrilliat et al. (2008). \|
Callina waldeni{{Cite journal\|author1=Willy De Mattia \|author2=Marco T. Neiber \|author3=Klaus Groh \|year=2018 \|title=Revision of the genus-group Hystricella R. T. Lowe, 1855 from Porto Santo (Madeira Archipelago), with descriptions of new recent and fossil taxa (Gastropoda, Helicoidea, Geomitridae) \|journal=ZooKeys \|issue=732 \|pages=1–125 \|doi=10.3897/zookeys.732.21677 \|pmid=29416404 \|pmc=5799741 \|doi-access=free \|bibcode=2018ZooK..732....1D }} \| Sp. nov \| Valid \| Groh & De Mattia in De Mattia, Neiber & Groh \| Quaternary \| \| {{Flag\|Portugal}} ({{Flag\|Madeira}}) \| A member of Helicoidea belonging to the family Geomitridae. \|
Calliotropis (Riselloidea) faustiankensis{{Cite journal\|author1=Mariel Ferrari \|author2=Andrzej Kaim \|year=2018 \|title=Onshore-offshore trend in the evolution of calliotropid gastropods expressed in shell morphology \|journal=Journal of Systematic Palaeontology \|volume=17 \|issue=4 \|pages=269–286 \|doi=10.1080/14772019.2017.1407371 \|hdl=11336/62065 \|s2cid=90434987 \|url=https://figshare.com/articles/dataset/Onshore-offshore_trend_in_the_evolution_of_calliotropid_gastropods_expressed_in_shell_morphology/5752452 }} \| Sp. nov \| Valid \| Ferrari & Kaim \| Middle Jurassic \| \| {{Flag\|Poland}} \| A species of Calliotropis. \|
Calliotropis (Riselloidea) lukovensis \| Sp. nov \| Valid \| Ferrari & Kaim \| Middle Jurassic \| \| {{Flag\|Poland}} \| A species of Calliotropis. \|
Calliovarica oregonensis{{Cite journal\|author=Carole S. Hickman \|year=2018 \|title=A new Calliovarica species (Seguenzioidea: Chilodontidae) from the Eocene of Oregon, USA: Persistence of a relict Mesozoic gastropod group in a unique forearc tectonic setting \|journal=PaleoBios \|volume=35 \|pages=ucmp_paleobios_38726 \|url=https://escholarship.org/uc/item/42b5m4kn }} \| Sp. nov \| Valid \| Hickman \| Early late Eocene \| Nestucca Formation \| {{Flag\|United States}} ({{Flag\|Oregon}}) \| A member of the family Chilodontaidae. \|
Callotrochus? avernoides \| Sp. nov \| Valid \| Szabó \| Early Jurassic (Sinemurian to Pliensbachian) \| Hierlatz Limestone \| {{Flag\|Austria}} \| A possible member of the family Calliostomatidae. \|
Carnevalea santiapillaii{{Cite journal\|author1=Y. Ranjeev Epa \|author2=Alycia L. Stigall \|author3=Eric M. Roberts \|author4=Haley D. O'Brien \|author5=Nancy J. Stevens \|year=2018 \|title=Morphological diversification of ampullariid gastropods (Nsungwe Formation, Late Oligocene, Rukwa Rift Basin, Tanzania) is coincident with onset of East African rifting \|journal=Papers in Palaeontology \|volume=4 \|issue=3 \|pages=327–348 \|doi=10.1002/spp2.1108 \|doi-access=free \|bibcode=2018PPal....4..327E }} \| Sp. nov \| Valid \| Epa et al. \| Late Oligocene \| Nsungwe Formation \| {{Flag\|Tanzania}} \| A member of the family Ampullariidae. \|
Carychium stworzewiczae \| Sp. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Poland}} \| A species of Carychium. \|
Cassis calusa{{Cite journal\|author1=Edward J. Petuch \|author2=David P. Berschauer \|year=2018 \|title=New species of Cassis (Cassidae) from the Caloosahatchee Formation of southern Florida \|journal=The Festivus \|volume=50 \|issue=4 \|pages=239–244 \|doi=10.54173/F504239 }} \| Sp. nov \| Valid \| Petuch & Berschauer \| Pleistocene \| Caloosahatchee Formation \| {{Flag\|United States}} ({{Flag\|Florida}}) \| A species of Cassis. \|
Cassis powelli \| Sp. nov \| Valid \| Petuch & Berschauer \| Pleistocene \| Caloosahatchee Formation \| {{Flag\|United States}} ({{Flag\|Florida}}) \| A species of Cassis. \|
Cerithiella malakae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Cerithiella. \|
Cerithiella salmae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Cerithiella. \|
Cerithiopsis andreae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Cerithiopsis. \|
Cerithiopsis boanderseni \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Cerithiopsis. \|
Cerithiopsis cerithiopsoides \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Cerithiopsis. \|
Cerithiopsis emilieae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Cerithiopsis. \|
Cerithiopsis esterae \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Cerithiopsis. \|
?Cerithiopsis luiseae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| Possibly a species of Cerithiopsis. \|
Cerithiopsis mira \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Cerithiopsis. \|
Cerithium miocanariensis{{Cite journal\|author1=Esther Martín-González \|author2=José Luis Vera-Peláez \|author3=Carolina Castillo \|author4=M. Carmen Lozano-Francisco \|year=2018 \|title=New fossil gastropod species (Mollusca: Gastropoda) from the upper Miocene of the Canary Islands (Spain) \|journal=Zootaxa \|volume=4422 \|issue=2 \|pages=191–218 \|doi=10.11646/zootaxa.4422.2.3 \|pmid=30313501 }} \| Sp. nov \| Valid \| Martín-González & Vera-Peláez in Martín-González et al. \| Late Miocene \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A species of Cerithium. \|
Chelidonura radwanskii{{Cite journal\|author=Wacław Bałuk \|year=2018 \|title=A new heterobranch gastropod, Chelidonura radwanskii sp. nov., from the middle Miocene of the Korytnica Basin (Holy Cross Mountains, Poland) \|journal=Acta Geologica Polonica \|volume=68 \|issue=4 \|pages=499–502 \|doi=10.1515/agp-2018-0030 \|doi-broken-date=1 November 2024\|url=https://geojournals.pgi.gov.pl/agp/article/view/26115 }} \| Sp. nov \| Valid \| Bałuk \| Miocene (Langhian) \| Korytnica Basin \| {{Flag\|Poland}} \| A species of Chelidonura. \|
Clathurella pierreaimei \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Clathurella. \|
Clavatula helwerdae \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Clavatula. \|
Clavogyra{{Cite journal\|author=Arnaud Leroy \|year=2018 \|title=Clavogyra ledeei gen. et sp. nov (Mollusca, Neogastropoda, Turbinellidae) de l'Yprésien du Bassin de Paris \|journal=Carnets de Voyages Paléontologiques dans le Bassin Anglo-Parisien \|volume=4 \|pages=135–147 \|isbn=978-2-9538000-4-3 }} \| Gen. et sp. nov \| Valid \| Leroy \| Eocene (Ypresian) \| Paris Basin \| {{Flag\|France}} \| A member of the family Turbinellidae. The type species is C. ledeei. \|
Cleotrivia gallica \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Cleotrivia. \|
Coelostylina hydrobiformis{{Cite journal\|author1=Alexander Nützel \|author2=David Ware \|author3=Hugo Bucher \|author4=Michael Hautmann \|author5=Ghazala Roohi \|author6=Khalil Ur-Rehman \|author7=Amir Yaseen \|year=2018 \|title=An Early Triassic (Dienerian) microgastropod assemblage from the Salt Range, Pakistan and its implication for gastropod recovery from the end-Permian mass extinction \|journal=Bulletin of Geosciences \|volume=93 \|issue=1 \|pages=56–70 \|doi=10.3140/bull.geosci.1682 \|doi-access=free }} \| Sp. nov \| Valid \| Nützel & Ware in Nützel et al. \| Early Triassic \| \| {{Flag\|Pakistan}} \| A member of the family Coelostylinidae. \|
Coelostylina micropunctata{{Cite journal\|author1=Alexander Nützel \|author2=Andrzej Kaim \|author3=Eugen Grădinaru \|year=2018 \|title=Middle Triassic (Anisian, Bithynian) gastropods from North Dobrogea (Romania) and their significance for gastropod recovery from the end-Permian mass extinction event \|journal=Papers in Palaeontology \|volume=4 \|issue=4 \|pages=477–512 \|doi=10.1002/spp2.1115 \|bibcode=2018PPal....4..477N \|s2cid=133913607 \|url=https://www.researchgate.net/publication/324986596 }} \| Sp. nov \| Valid \| Nützel, Kaim & Grădinaru \| Middle Triassic (Anisian) \| \| {{Flag\|Romania}} \| A member of the family Coelostylinidae. \|
Conasprella paupera \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Conasprella. \|
Conasprella trianginodus \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Conasprella. \|
Conus fuerteventurensis \| Sp. nov \| Valid \| Vera-Peláez & Martín-González in Martín-González et al. \| Late Miocene \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A species of Conus. \|
Conus (Stephanoconus) woodringi{{Cite journal\|author=Jonathan R. Hendricks \|year=2018 \|title=Diversity and preserved shell coloration patterns of Miocene Conidae (Neogastropoda) from an exposure of the Gatun Formation, Colón Province, Panama \|journal=Journal of Paleontology \|volume=92 \|issue=5 \|pages=804–837 \|doi=10.1017/jpa.2017.153 \|bibcode=2018JPal...92..804H \|s2cid=134198400 }} \| Sp. nov \| Valid \| Hendricks \| Miocene \| Gatun Formation \| {{Flag\|Panama}} \| A species of Conus. \|
Crassispira strangulata \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Crassispira. \|
Crassitonella lozoueti \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| \|
Cretatortulosa{{Cite journal\|author1=Tingting Yu \|author2=Bo Wang \|author3=Huazhang Pan \|year=2018 \|title=New terrestrial gastropods from mid-Cretaceous Burmese amber \|journal=Cretaceous Research \|volume=90 \|pages=254–258 \|doi=10.1016/j.cretres.2018.04.015 \|bibcode=2018CrRes..90..254Y \|s2cid=135095258 }} \| Gen. et sp. nov \| Valid \| Yu, Wang & Pan \| Late Cretaceous (Cenomanian) \| Burmese amber \| {{Flag\|Myanmar}} \| A member of the family Pupinidae. Genus includes new species C. multilinea. \|
Cristispira caballasensis \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A member of the family Turritellidae. \|
Csigabaga \| Gen. et sp. nov \| Valid \| Szabó \| Early Jurassic (Sinemurian to Pliensbachian) \| Hierlatz Limestone \| {{Flag\|Austria}} \| A member of the family Proconulidae. The type species is C. nillae. \|
Cupaniella praebiplicata \| Sp. nov \| Valid \| Szabó \| Early Jurassic (Sinemurian to Pliensbachian) \| Hierlatz Limestone \| {{Flag\|Austria}} \| A member of the family Chilodontaidae. \|
Cymbiola ambugensis \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Cymbiola. \|
Cymbovula (Winklea) \| Subgen. nov \| Valid \| Dolin & Dockery \| Eocene (Bartonian) \| Cook Mountain Formation \| {{Flag\|United States}} ({{Flag\|Alabama}}) \| A subgenus of Cymbovula. The subgenus includes Cymbovula transovuloides (Schilder, 1926). \|
Cypraedia durandae{{Cite journal\|author1=Luc Dolin \|author2=Olivier Aguerre \|year=2018 \|title=Les Cypraeidae et Ovulidae (Mollusca, Caenogastropoda) du Bartonien inférieur (Éocène moyen) de la Loire-Atlantique (France) \|journal=Carnets de Voyages Paléontologiques dans le Bassin Anglo-Parisien \|volume=4 \|pages=87–134 \|isbn=978-2-9538000-4-3 }} \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| A species of Cypraedia. \|
Cypraedia fragilis \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| A species of Cypraedia. \|
Cypraedia insperata{{Cite journal\|author=Jean-Michel Pacaud \|year=2018 \|title=Les Cypraeoidea (Mollusca, Caenogastropoda) du Priabonien (Éocène supérieur) de Dnipro (Oblast de Dnipropetrovsk, Ukraine). Partie 3 : Ovulidae (suite) et Eratoidae \|journal=Xenophora Taxonomy \|volume=22 \|pages=3–18 \|url=https://www.researchgate.net/publication/327728902 }} \| Sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| A species of Cypraedia. \|
Cypraedia prunellum \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| A species of Cypraedia. \|
Cypraeorbis angustior{{cite journal \|author1=Andrea Checchi \|author2=Fiorenzo Zamberlan \|year=2018 \|title=Nuove specie di Cypraeorbis Conrad, 1865 nell'Eocene di "Cava Rossi" di Monte di Malo (Vicenza, Italia nord-orientale) \|journal=Studi e Ricerche - Associazione Amici del Museo - Museo Civico "G. Zannato" Montecchio Maggiore (Vicenza) \|volume=25 \|pages=19–26 }} \| Sp. nov \| Valid \| Checchi & Zamberlan \| Eocene (late Ypresian-early Lutetian) \| \| {{Flag\|Italy}} \| A species of Cypraeorbis. \|
Cypraeorbis longula \| Sp. nov \| Valid \| Checchi & Zamberlan \| Eocene (late Ypresian-early Lutetian) \| \| {{Flag\|Italy}} \| A species of Cypraeorbis. \|
Dermomurex nemethi{{Cite journal\|author=Zoltán Kovács \|year=2018 \|title=Description of three new species of Muricidae (Neogastropoda) from the Miocene Paratethys \|journal=Novapex \|volume=19 \|issue=1 \|pages=29–35 \|url=https://www.researchgate.net/publication/324224198 }} \| Sp. nov \| Valid \| Kovács \| Middle Miocene \| Sámsonháza Formation \| {{Flag\|Hungary}} \| A species of Dermomurex. \|
Desbruyeresia belliatus{{Cite journal\|author1=Frida Hybertsen \|author2=Steffen Kiel \|year=2018 \|title=A middle Eocene seep deposit with silicified fauna from the Humptulips Formation in western Washington State, USA \|journal=Acta Palaeontologica Polonica \|volume=63 \|issue=4 \|pages=751–768 \|doi=10.4202/app.00525.2018 \|doi-access=free }} \| Sp. nov \| Valid \| Hybertsen & Kiel \| Middle Eocene \| Humptulips Formation \| {{Flag\|United States}} ({{Flag\|Washington}}) \| A species of Desbruyeresia. \|
Discopsis pseudocanui \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Discopsis. \|
Dizoniopsis boucheti \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Dizoniopsis. \|
Dolomena bruneiensis \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Dolomena. \|
Duplicaria aequalis \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Duplicaria. \|
Eographis \| Gen. et sp. nov \| Valid \| Nützel & Ware in Nützel et al. \| Early Triassic \| \| {{Flag\|Pakistan}} \| A member of the family Hyalogyrinidae. The type species is E. microlineata. \|
Eotrivia amitrovi \| Sp. nov \| Disputed \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| Fehse (2021) considered this species to be a junior synonym of Eotrivia faracii (de Gregorio, 1880).{{Cite journal\|author=Dirk Fehse \|title=Zur Identität von Eotrivia faracii (de Gregorio, 1880) und Beschreibung einer neuen Art in der Gattung Eotrivia F. A. Schilder, 1924 (Mollusca, Gastropoda) \|year=2021 \|journal=Conchylia \|volume=52 \|issue=1–2 \|pages=79–84 }} \|
Eotrivia ledoni \| Sp. nov \| Valid \| Pacaud \| Eocene (Lutetian) \| \| {{Flag\|France}} \| \|
?Epetrium flemmingi \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| \|
?Epetrium pernilleae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| \|
Erato lozoueti{{Cite journal\|author=Dirk Fehse \|year=2018 \|title=Contributions to the knowledge of the Eratoidae, XVII. Description of three new species and one new genus of Eratoidae from the Oligocene of SW France \|journal=Conchylia \|volume=48 \|issue=3–4 \|pages=3–13 }} \| Sp. nov \| Valid \| Fehse \| Oligocene (Chattian) \| \| {{Flag\|France}} \| A species of Erato. \|
Erato prodromos{{Cite journal\|author=Dirk Fehse \|year=2018 \|title=Replacement name for the eratoid homonym Erato precursor Fehse, 2018 \|journal=Conchylia \|volume=49 \|issue=1–2 \|pages=23 }} \| Nom. nov \| Valid \| Fehse \| Oligocene (Chattian) \| \| {{Flag\|France}} \| A species of Erato. The original specific name was Erato precursor Fehse (2018), which turned out to be preoccupied by Erato praecursor Cossmann & Pissarro (1905). \|
Eratopsis zoltani{{Cite journal\|author=Dirk Fehse \|year=2018 \|title=Contributions to the knowledge of the Eratoidae, XXI. A new Eratopsis R. Hoernes & Auinger, 1879 from the Miocene of Hungary \|journal=Conchylia \|volume=49 \|issue=3–4 \|pages=39–43 }} \| Sp. nov \| Valid \| Fehse \| Miocene \| \| {{Flag\|Hungary}} \| A member of the family Eratoidae. \|
Eratotrivia neptis \| Sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| \|
Eucyclomphalus? subgradatus \| Sp. nov \| Valid \| Szabó \| Early Jurassic (Sinemurian to Pliensbachian) \| Hierlatz Limestone \| {{Flag\|Austria}} \| A member of the family Eucycloscalidae. \|
Eucypraedia bertechae \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Eucypraedia longiuscula \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Eucypraedia ocliferia \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Euphemites rollinsi{{cite journal \|author=John A. Harper \|year=2018 \|title=Gastropods of the Gilmore City Formation (Lower Mississippian) of north-central Iowa: Part 1, geology and systematics of Bellerophontoidea and Euomphaloidea \|journal=Annals of Carnegie Museum \|volume=85 \|issue=1 \|pages=61–90 \|doi=10.2992/007.085.0104 \|s2cid=134817228 }} \| Sp. nov \| Valid \| Harper \| Carboniferous (Mississippian) \| Gilmore City Formation \| {{Flag\|United States}} ({{Flag\|Iowa}}) \| A member of Bellerophontoidea. \|
Eurocystina \| Gen. et sp. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Poland}} \| A member of the family Pristilomatidae. The type species is E. nordsiecki. \|
Euryalox applanatus \| Sp. nov \| Valid \| Nützel, Kaim & Grădinaru \| Middle Triassic (Anisian) \| \| {{Flag\|Romania}} \| A member of the family Phymatopleuridae. \|
Euthema \| Gen. et sp. nov \| Valid \| Yu, Wang & Pan \| Late Cretaceous (Cenomanian) \| Burmese amber \| {{Flag\|Myanmar}} \| A member of the family Diplommatinidae. Genus includes new species E. naggsi. \|
Euthria viciani{{Cite journal\|author=Zoltán Kovács \|year=2018 \|title=New records of genus Euthria (Mollusca, Buccinidae) in the Miocene Paratethys \|journal=Földtani Közlöny \|volume=148 \|issue=2 \|pages=179–182 \|doi=10.23928/foldt.kozl.2018.148.2.179 \|doi-access=free }} \| Sp. nov \| Valid \| Kovács \| Middle Miocene \| Leitha Limestone Formation \| {{Flag\|Hungary}} \| A species of Euthria. \|
Exilia frejae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Exilia. \|
Ficus parvissima \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Ficus. \|
Garviea \| Gen. et comb. nov \| Valid \| Dolin & Dockery \| Eocene (Bartonian) \| Cook Mountain Formation \| {{Flag\|Trinidad and Tobago}} {{Flag\|United States}} ({{Flag\|Alabama}} {{Flag\|Mississippi}} {{Flag\|Texas}}) \| A member of Cypraeidae belonging to the subfamily Gisortiinae. The type species is "Cypraea" nuculoides Aldrich (1903); genus also includes "Archicypraea" degenerata Schilder (1939). \|
Gastrocopta (Albinula) polonica \| Sp. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Poland}} \| A species of Gastrocopta. \|
Gemmula sculpturata \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Gemmula. \|
Genota maximei \| Nom. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Miocene \| \| {{Flag\|France}} \| A species of Genota; a replacement name for Pleurotoma insignis Millet, non Edwards, 1861. \|
Gibbula tindayaensis \| Sp. nov \| Valid \| Martín-González & Vera-Peláez in Martín-González et al. \| Late Miocene \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A species of Gibbula. \|
Gisortia khargaensis{{cite journal \|author1=Abdel Galil A. Hewaidy \|author2=Gamal M. El Qot \|author3=El Sayed M. Moneer \|year=2018 \|title=Campanian-Lower Paleogene gastropods from the Kharga Oasis, south Western Desert, Egypt \|journal=Arabian Journal of Geosciences \|volume=11 \|issue=24 \|pages=Article 781 \|doi=10.1007/s12517-018-4078-1 \|bibcode=2018ArJG...11..781H \|s2cid=133961074 }} \| Sp. nov \| Valid \| Hewaidy, El Qot & Moneer \| Early Eocene \| El Rufuf Formation \| {{Flag\|Egypt}} \| \|
Gymnobela santorsolae{{Cite journal\|author=Cesare Tabanelli \|year=2018 \|title=Una specie fossile di grande profondità: Gymnobela santorsolae n. sp. (Mollusca: Gastropoda: Raphitomidae) \|journal=Quaderno di Studi e Notizie di Storia Naturale della Romagna \|volume=47 \|pages=1–7 \|url=https://www.researchgate.net/publication/327020197 }} \| Sp. nov \| Valid \| Tabanelli \| Pliocene and Pleistocene (Gelasian) \| \| {{Flag\|Italy}} \| A species of Gymnobela. \|
Haedropleura fratemcontii \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Haedropleura. \|
Hemifusus charlieleei \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Hemifusus. \|
Hierlatzella \| Gen. et sp. nov \| Valid \| Szabó \| Early Jurassic (Sinemurian to Pliensbachian) \| Hierlatz Limestone \| {{Flag\|Austria}} \| A member of the family Coelostylinidae. The type species is H. arcana. \|
Hippochrenes nautagarona{{Cite journal\|author1=Jean-Michel Pacaud \|author2=Dominique Teodori \|author3=Michel Bilotte \|year=2018 \|title=Première occurrence du genre Hippochrenes (Mollusca, Gastropoda, Rostellariidae) dans le Maastrichtien (Crétacé supérieur) de Larcan (Haute-Garonne, France) et description d'une espèce nouvelle : H. nautagarona nov. sp. \|journal=Bulletin de la Société des Sciences Naturelles de Toulouse \|volume=153 \|pages=41–47 \|url=https://www.researchgate.net/publication/323453476 }} \| Sp. nov \| Valid \| Pacaud, Teodori & Bilotte \| Late Cretaceous (Maastrichtian) \| \| {{Flag\|France}} \| A member of the family Rostellariidae. \|
Hystricella microcarinata \| Sp. nov \| Valid \| De Mattia & Groh in De Mattia, Neiber & Groh \| Quaternary \| \| {{Flag\|Portugal}} ({{Flag\|Madeira}}) \| A species of Hystricella. \|
Indomitrella acuticonica \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Indomitrella. \|
Inella alia \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Inella. \|
Inella rolani \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Inella. \|
Jujubinus ajachaensis \| Sp. nov \| Valid \| Martín-González & Vera-Peláez in Martín-González et al. \| Late Miocene \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A species of Jujubinus. \|
Kangilioptera gundstrupensis \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| \|
Karsaconulus \| Gen. et sp. nov \| Valid \| Szabó \| Early Jurassic (Sinemurian to Pliensbachian) \| Hierlatz Limestone \| {{Flag\|Austria}} \| A member of the family Proconulidae. The type species is K. robustus. \|
Kericserispira{{Cite journal\|author=János Szabó \|year=2018 \|title=Kericserispira nomen novum, a new substitute name instead of Foveolaria Szabó, 2017 (non Foveolaria Busk, 1884) \|journal=Fragmenta Palaeontologica Hungarica \|volume=35 \|pages=85 \|doi=10.17111/FragmPalHung.2018.35.85 \|url=http://real.mtak.hu/134275/1/Fragm_paleont_hung_2018_Vol_35_85.pdf }} \| Nom. nov \| Valid \| Szabó \| Early Jurassic (Sinemurian to Pliensbachian) \| Hierlatz Limestone \| {{Flag\|Austria}} {{Flag\|France}} {{Flag\|Hungary}} \| A possible member of Pithodeidae; a replacement name for Foveolaria Szabó (2016). \|
Klavlia{{Cite journal\|author=A. V. Mazaev \|year=2018 \|title=Early Kazanian (Middle Permian) gastropods \|journal=Paleontological Journal \|volume=52 \|issue=7 \|pages=796–827 \|doi=10.1134/S0031030118070067 \|bibcode=2018PalJ...52..796M \|s2cid=91328323 }} \| Gen. et sp. nov \| Valid \| Mazaev \| Middle Permian \| Krasnyi Yar Beds \| {{Flag\|Russia}} ({{Flag\|Samara Oblast}}) \| A member of the family Holopeidae belonging to the subfamily Gyronematinae. Genus includes new species K. klavlia. \|
Ladinaticella simionescui \| Sp. nov \| Valid \| Nützel, Kaim & Grădinaru \| Middle Triassic (Anisian) \| \| {{Flag\|Romania}} \| A member of Neritimorpha belonging to the family Scalaneritinidae. \|
Laevicaspia vinarskii{{Cite journal\|author1=Thomas A. Neubauer \|author2=Sabrina van de Velde \|author3=Tamara Yanina \|author4=Frank P. Wesselingh \|year=2018 \|title=A late Pleistocene gastropod fauna from the northern Caspian Sea with implications for Pontocaspian gastropod taxonomy \|journal=ZooKeys \|issue=770 \|pages=43–103 \|doi=10.3897/zookeys.770.25365 \|pmid=30002590 \|pmc=6041354 \|doi-access=free \|bibcode=2018ZooK..770...43N }} \| Sp. nov \| Valid \| Neubauer et al. \| Late Pleistocene \| \| {{Flag\|Russia}} ({{Flag\|Astrakhan Oblast}}) \| A member of the family Hydrobiidae. \|
Lanistes microovum \| Sp. nov \| Valid \| Epa et al. \| Late Oligocene \| Nsungwe Formation \| {{Flag\|Tanzania}} \| A species of Lanistes. \|
Lanistes nsungwensis \| Sp. nov \| Valid \| Epa et al. \| Late Oligocene \| Nsungwe Formation \| {{Flag\|Tanzania}} \| A species of Lanistes. \|
Lanistes rukwaensis \| Sp. nov \| Valid \| Epa et al. \| Late Oligocene \| Nsungwe Formation \| {{Flag\|Tanzania}} \| A species of Lanistes. \|
Lanistes songwellipticus \| Sp. nov \| Valid \| Epa et al. \| Late Oligocene \| Nsungwe Formation \| {{Flag\|Tanzania}} \| A species of Lanistes. \|
Lanistes songweovum \| Sp. nov \| Valid \| Epa et al. \| Late Oligocene \| Nsungwe Formation \| {{Flag\|Tanzania}} \| A species of Lanistes. \|
Leiostyla piserai \| Sp. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Poland}} {{Flag\|Austria}}? \| A species of Leiostyla. \|
Levifusus metteae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| \|
Lophospira telleri{{Cite journal\|author=John S. Peel \|year=2018 \|title=Teller's operculum; revising a rare operculate gastropod from the Silurian of Wisconsin (Laurentia) \|journal=Bulletin of Geosciences \|volume=93 \|issue=4 \|pages=499–511 \|doi=10.3140/bull.geosci.1725 \|doi-access=free }} \| Sp. nov \| Valid \| Peel \| Silurian \| Racine Formation \| {{Flag\|United States}} ({{Flag\|Illinois}} {{Flag\|Wisconsin}}) \| A member of the family Lophospiridae. \|
Lozouetina \| Gen. et comb. nov \| Valid \| Dolin & Dockery \| Eocene (Lutetian and Bartonian) \| Biarritzian Formation Cook Mountain Formation Kosciusko Formation \| {{Flag\|France}} {{Flag\|Spain}} {{Flag\|United States}} ({{Flag\|Mississippi}} {{Flag\|South Carolina}} {{Flag\|Texas}}) \| A member of the family Ovulidae belonging to the subfamily Pediculariinae. The type species is "Trivia" recluzi Cossmann (1897); genus also includes "Cypraea" kennedyi Harris (1895). \|
Macromphalina morgani \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Macromphalina. \|
?Mangelia stoutjesdijki \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| Possibly a species of Mangelia. \|
Mannegaardina{{Cite journal\|author1=Jiří Frýda \|author2=Jan Ove R. Ebbestad \|author3=Barbora Frýdová \|year=2018 \|title=The oldest members of Porcellioidea (Gastropoda): a new link between Baltica and Perunica \|journal=Papers in Palaeontology \|volume=5 \|issue=2 \|pages=281–297 \|doi=10.1002/spp2.1241 \|s2cid=134686637 }} \| Gen. et sp. nov \| Valid \| Frýda, Ebbestad & Frýdová \| Silurian (Gorstian) \| \| {{Flag\|Sweden}} \| A member of Porcellioidea. Genus includes new species M. hedei. \|
Marmolatella iordanae \| Sp. nov \| Valid \| Nützel, Kaim & Grădinaru \| Middle Triassic (Anisian) \| \| {{Flag\|Romania}} \| A member of Neritimorpha belonging to the family Naticopsidae. \|
Martinietta kadolskyi \| Sp. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Poland}} \| A member of the family Hydrobiidae. \|
Mcleaniella{{Cite journal\|author=Jean-Michel Pacaud \|year=2018 \|title=Mcleaniella, a new genus of Liotiidae (Mollusca, Gastropoda) from Paleocene of the Paris Basin (France) \|journal=Xenophora Taxonomy \|volume=18 \|pages=7–10 \|url=https://www.academia.edu/35545520 }} \| Gen. et comb. nov \| Valid \| Pacaud \| Paleocene \| \| {{Flag\|France}} \| A member of the family Liotiidae; a new genus for "Solarium" danae d'Orbigny (1850). \|
Meekospira baytuganensis \| Sp. nov \| Valid \| Mazaev \| Middle Permian \| Baitugan Beds \| {{Flag\|Russia}} ({{Flag\|Samara Oblast}}) \| A member of the family Meekospiridae. \|
Melanella indicaformis \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A species of Melanella. \|
Menathais viciani \| Sp. nov \| Valid \| Kovács \| Middle Miocene \| Sámsonháza Formation \| {{Flag\|Hungary}} \| A member of the family Muricidae. \|
Mennoia \| Gen. et sp. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Poland}} \| A member of Limacoidea of uncertain phylogenetic placement. The type species is M. sculpturata. \|
Monophorus renauleauensis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Monophorus. \|
Morula mionigra \| Sp. nov \| Valid \| Martín-González in Martín-González et al. \| Late Miocene \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A species of Morula. \|
Murchisonietta \| Gen. et sp. nov \| Valid \| Nützel, Kaim & Grădinaru \| Middle Triassic (Anisian) \| \| {{Flag\|Romania}} \| A possible member of the family Goniasmatidae. Genus includes new species M. acuta. \|
Nassarius pseudoovum \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Nassarius. \|
Nerita squatina \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A species of Nerita. \|
Neritaria kamyshlensis \| Sp. nov \| Valid \| Mazaev \| Middle Permian \| Krasnyi Yar Beds \| {{Flag\|Russia}} ({{Flag\|Samara Oblast}}) \| A member of the family Neritidae. \|
Neritoptyx hogansoni{{Cite journal\|author=J. Mark Erickson \|year=2018 \|title=Neritoptyx hogansoni new species (Gastropoda, Mollusca) from the Upper Cretaceous Fox Hills Formation on the Dakota Isthmus, western United States \|journal=Journal of Paleontology \|volume=93 \|issue=2 \|pages=278–290 \|doi=10.1017/jpa.2018.82 \|s2cid=134522158 }} \| Sp. nov \| Valid \| Erickson \| Late Cretaceous (Maastrichtian) \| Fox Hills Formation \| {{Flag\|United States}} \| \|
Neubertella \| Gen. et sp. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Poland}} \| A member of Limacoidea of uncertain phylogenetic placement. The type species is N. pulchra. \|
Neverita majimai \| Sp. nov \| Valid \| Amano & Jenkins in Amano, Jenkins & Kurita \| Paleocene \| Katsuhira Formation \| {{Flag\|Japan}} \| A species of Neverita. \|
Ninglangella samarensis \| Sp. nov \| Valid \| Mazaev \| Middle Permian \| Krasnyi Yar Beds \| {{Flag\|Russia}} ({{Flag\|Samara Oblast}}) \| A member of the family Meekospiridae. \|
Niveria cylindriclementi \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Niveria. \|
Nodifaunus gainesi \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| \|
Obesula marshalli \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| \|
Ocinebrina landaui{{Cite journal\|author=Zoltán Kovács \|year=2018 \|title=Muricidae (Neogastropoda) assemblages from the Middle Miocene of the Făget Basin (Romania) in the collection of the Hungarian Natural History Museum, Budapest \|journal=Fragmenta Palaeontologica Hungarica \|volume=35 \|pages=111–142 \|doi=10.17111/FragmPalHung.2018.35.111 \|url=http://real.mtak.hu/134419/1/Fragm_paleont_hung_2018_Vol_35_111.pdf }} \| Sp. nov \| Valid \| Kovács \| Middle Miocene \| Dej Formation \| {{Flag\|Romania}} \| A species of Ocinebrina. \|
Occidentina \| Gen. et comb. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Austria}} {{Flag\|Hungary}} {{Flag\|Poland}} \| A member of the family Diplommatinidae. The type species is "Adelopoma" martensi Andreae (1902). \|
Oligodia chauvereauensis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| \|
Oliva balteata{{Cite journal\|author1=J. G. M. Raven \|author2=P. Recourt \|year=2018 \|title=Notes on molluscs from NW Borneo. 4. Olivoidea (Gastropoda, Neogastropoda), with the description of eight new species \|journal=Vita Malacologica \|volume=17 \|pages=113–155 }} \| Sp. nov \| Valid \| Raven & Recourt \| Miocene \| \| {{Flag\|Malaysia}} \| A species of Oliva. \|
Oliva bekenuensis \| Sp. nov \| Valid \| Raven & Recourt \| Miocene \| \| {{Flag\|Malaysia}} \| A species of Oliva. \|
Oliva curta \| Sp. nov \| Valid \| Raven & Recourt \| Miocene \| \| {{Flag\|Malaysia}} \| A species of Oliva. \|
Oliva telescopica \| Sp. nov \| Valid \| Raven & Recourt \| Miocene \| \| {{Flag\|Malaysia}} \| A species of Oliva. \|
Olivella microstriata \| Sp. nov \| Valid \| Raven & Recourt \| Miocene \| \| {{Flag\|Brunei}} \| A species of Olivella. \|
Ondina asterixi \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Ondina. \|
Onoba fragilis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Onoba. \|
Onoba incisa \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Onoba. \|
Onoba redoniensis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Onoba. \|
Orbitestella dioi \| Sp. nov \| Valid \| Hybertsen & Kiel \| Middle Eocene \| Humptulips Formation \| {{Flag\|United States}} ({{Flag\|Washington}}) \| A member of the family Orbitestellidae. \|
Ornopsis? barisensis \| Sp. nov \| Valid \| Hewaidy, El Qot & Moneer \| Early Paleocene \| Kurkur Formation \| {{Flag\|Egypt}} \| \|
Orthochetus darraghi \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| \|
Osilinus burgadoi \| Sp. nov \| Valid \| Martín-González in Martín-González et al. \| Late Miocene \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A species of Osilinus. \|
Papposilenus \| Gen. et comb. et sp. nov \| Valid \| DeVries \| Early Paleogene to Miocene \| Pisco Basin (Caballas Formation) \| {{Flag\|Colombia}} {{Flag\|Dominican Republic}} {{Flag\|Ecuador}} {{Flag\|Peru}} {{Flag\|United States}} ({{Flag\|Florida}}) \| A member of the family Potamididae. The type species is "Cerithium" suprasulcatum Gabb (1873); genus also includes "Cerithium" suprasulcatum Gabb (1873), "Potamides" ormei Maury (1917), "Potamides" infraliratus Spieker (1922) and a new species Papposilenus utriculus. \|
Papuliscala presselierensis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Papuliscala. \|
Papuliscala redoniensis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Papuliscala. \|
Paradrillia pachyspira \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Paradrillia. \|
Paradrobacia hrvatovici{{Cite journal\|author1=Mathias Harzhauser \|author2=Oleg Mandic \|author3=Hartmut Nordsieck \|author4=Thomas A. Neubauer \|year=2018 \|title=A new Helicidae (Gastropoda) from the Middle Miocene of Bosnia and Herzegovina, with a revision of the genus Paradrobacia \|journal=Palaeobiodiversity and Palaeoenvironments \|volume=100 \|issue=2 \|pages=551–559 \|doi=10.1007/s12549-018-0344-1 \|s2cid=134165125 }} \| Sp. nov \| Valid \| Harzhauser, Mandic & Neubauer in Harzhauser et al. \| Miocene (Langhian) \| \| {{Flag\|Bosnia and Herzegovina}} \| A member of the family Helicidae. \|
Paraseraphs cantamessae{{cite journal \|author1=S. J. Maxwell \|author2=B. C. Congdon \|author3=T. L. Rymer \|year=2018 \|title=A new species of Paraseraphs (Gastropoda, Seraphsidae) from the Priabonian White Limestone Formation of Jamaica \|journal=Paleontological Journal \|volume=52 \|issue=12 \|pages=1371–1373 \|doi=10.1134/S0031030118120122 \|bibcode=2018PalJ...52.1371M \|s2cid=91432876 }} \| Sp. nov \| Valid \| Maxwell, Congdon & Rymer \| Eocene (Priabonian) \| White Limestone Formation \| {{Flag\|Jamaica}} \| A member of the family Seraphsidae. \|
Patella mahamensis \| Sp. nov \| Valid \| Martín-González in Martín-González et al. \| Late Miocene \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A species of Patella. \|
Patella maxoratensis \| Sp. nov \| Valid \| Martín-González & Vera-Peláez in Martín-González et al. \| Late Miocene \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A species of Patella. \|
Patella tintina \| Sp. nov \| Valid \| Martín-González & Vera-Peláez in Martín-González et al. \| Late Miocene \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A species of Patella. \|
Payraudeautia obelixi \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Payraudeautia. \|
Pernericirrus lindstroemi \| Sp. nov \| Valid \| Frýda, Ebbestad & Frýdová \| Silurian (Ludfordian) \| \| {{Flag\|Sweden}} \| A member of Porcellioidea. \|
Phos bruneiensis \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Phos. \|
Planellavitrina{{Cite journal\|author=C.J.P.J. Margry \|year=2018 \|title=Planellavitrina occulta gen. & spec. nov., a second fossil vitrinid from the Canary Island of La Gomera (Gastropoda, Pulmonata) \|journal=Basteria. Journal of the Netherlands Malacological Society \|volume=82 \|issue=1–3 \|pages=15–18 }} \| Gen. et sp. nov \| Valid \| Margry \| \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A member of the family Vitrinidae. Genus includes new species P. occulta. \|
Potamides henryi \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A species of Potamides. \|
Potamides janeae \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A species of Potamides. \|
Powellisetia europaea \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Powellisetia. \|
Praealaerato \| Gen. et sp. nov \| Valid \| Fehse \| Oligocene (Chattian) \| \| {{Flag\|France}} \| A relative of members of the genus Erato. Genus includes new species P. pacaudi. \|
Praerosaria besucus \| Sp. nov \| Valid \| Pacaud \| Eocene (Bartonian) \| \| {{Flag\|France}} \| A member of the family Cypraeidae. \|
Praerosaria borysthenis \| Sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| A member of the family Cypraeidae. \|
Praerosaria stefanskyii \| Sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| A member of the family Cypraeidae. \|
Primovula (Squiresia) \| Subgen. nov \| Valid \| Dolin & Dockery \| Eocene (Bartonian) \| Cook Mountain Formation \| {{Flag\|United States}} ({{Flag\|Alabama}}) \| A subgenus of Primovula. The subgenus includes Primovula symmetrica (Aldrich, 1903). \|
Projenneria acinonyx{{Cite journal\|author=Jean-Michel Pacaud \|year=2018 \|title=Les Cypraeoidea (Mollusca, Caenogastropoda) du Priabonien (Éocène supérieur) de Dnipro (Oblast de Dnipropetrovsk, Ukraine). Partie 2 : Ovulidae (le genre Projenneria Dolin, 1997) \|journal=Xenophora Taxonomy \|volume=21 \|pages=11–21 \|url=https://www.researchgate.net/publication/325976082 }} \| Sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| A member of the family Ovulidae. \|
Projenneria maculata \| Sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| A member of the family Ovulidae. \|
Provanna fortis \| Sp. nov \| Valid \| Hybertsen & Kiel \| Middle Eocene \| Humptulips Formation \| {{Flag\|United States}} ({{Flag\|Washington}}) \| A species of Provanna. \|
Prunum seriaense \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Prunum. \|
Pseudoklikia{{Cite journal\|author=Hartmut Nordsieck \|year=2018 \|title=A new genus of Helicidae (Stylommatophora, Gastropoda) from Early Pleistocene of Lower Austria, with information on the microsculpture of some Plio- and Pleistocene Helicoidea from central Europe \|journal=Conchylia \|volume=48 \|issue=3–4 \|pages=51–58 }} \| Gen. et comb. nov \| Valid \| Nordsieck \| Early Pleistocene \| \| {{Flag\|Austria}} \| A member of the family Helicidae. The type species is "Klikia" altenburgensis Binder (1977). \|
Pseudosetia ivolasi \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Pseudosetia. \|
Pseudosetia peyroti \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Pseudosetia. \|
Pseudosetia sergegofasi \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Pseudosetia. \|
Pseudosetia wareni \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Pseudosetia. \|
Pseudosimnia (Vokesina) \| Subgen. et sp. nov \| Valid \| Dolin & Dockery \| Eocene (Bartonian) \| Cook Mountain Formation \| {{Flag\|United States}} ({{Flag\|Mississippi}}) \| A subgenus of Pseudosimnia. The subgenus includes new species P. (V.) anteana. \|
Pusillina dollfusi \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Pusillina. \|
Pusillina gallica \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Pusillina. \|
Pyropsis jakobseni \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| \|
Pyropsis pacaudi \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| \|
Quadrinervus wienekei \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| \|
Racheliella{{Cite journal\|author=Alexander Nützel \|year=2018 \|title=Racheliella, a new mathildoid gastropod genus (Gastropoda, lower Heterobranchia) from the Late Triassic St. Cassian Formation (N Italy) \|journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen \|volume=287 \|issue=2 \|pages=207–211 \|doi=10.1127/njgpa/2018/0713 }} \| Gen. et comb. nov \| Valid \| Nützel \| Late Triassic (Carnian) \| San Cassiano Formation \| {{Flag\|Italy}} \| A member of Mathildoidea; a new genus for "Loxonema" mersai. \|
Raphitoma georgesi \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Raphitoma. \|
Raphitoma landreauensis \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Raphitoma. \|
Raphitoma palumbina \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Raphitoma. \|
Raphitoma pseudoconcinna \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Raphitoma. \|
Raphitoma turtaudierei \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Raphitoma. \|
Raphitoma vercingetorixi \| Sp. nov \| Valid \| Ceulemans, Van Dingenen & Landau \| Pliocene (Zanclean) \| \| {{Flag\|France}} \| A species of Raphitoma. \|
Rasatomaria multistriata \| Sp. nov \| Valid \| Nützel, Kaim & Grădinaru \| Middle Triassic (Anisian) \| \| {{Flag\|Romania}} \| A possible member of the family Pleurotomariidae. \|
Ravniella lipmanorum{{Cite journal\|author1=Richard L. Squires \|author2=Paul Lipman \|year=2018 \|title=First occurrence of the Paleocene gastropod Ravniella Rosenkrantz, 1970 (Heterobranchia: Acteonidae) in North America \|journal=The Nautilus \|volume=132 \|issue=2 \|pages=51–57 }} \| Sp. nov \| Valid \| Squires in Squires & Lipman \| Paleocene \| San Francisquito Formation Santa Susana Formation \| {{Flag\|United States}} ({{Flag\|California}}) \| A member of the family Acteonidae. \|
Rhinoclavis pulcherrima \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Rhinoclavis. \|
Rhinotamides everriculum \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A member of the family Potamididae. \|
Rhombopsis longinquus \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A member of the family Fasciolariidae. \|
Rissoa decorticata \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Rissoa. \|
Rissoa harmeri{{Cite journal\|author=M. J. Faber \|year=2018 \|title=A replacement name for Rissoa ambigua Harmer 1925 non Brugnone, 1873 (Gastropoda: Rissoidae) \|journal=Miscellanea Malacologica \|volume=8 \|issue=1 \|pages=35 }} \| Nom. nov \| Valid \| Faber \| Pliocene \| \| {{Flag\|United Kingdom}} \| A species of Rissoa; a replacement name for Rissoa ambigua Harmer (1925). \|
Rissoa obeliscoides \| Nom. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Rissoa; a replacement name for Rissoa notabilis Millet (1865). \|
Rissoa torquata \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Rissoa. \|
Rissoina tutongensis \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Rissoina. \|
Scalptia verheckeni \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Scalptia. \|
Scurria rieae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Scurria. \|
Seila petasa \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Seila. \|
Semibittium brebioni \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| \|
Semisulcospira (Biwamelania) kokubuensis{{Cite journal \|author1=Keiji Matsuoka \|author2=Osamu Miura \|year=2018 \|title=Five new species of the genus Semisulcospira (Mollusca: Caenogastropoda: Semisulcospiridae) from the Pleistocene Katata Formation of the Kobiwako Group, Shiga Prefecture, central Japan \|journal=Bulletin of the Mizunami Fossil Museum \|volume=44 \|pages=59–67 \|url=http://www.city.mizunami.lg.jp/docs/2018030900014/files/bull44matsuokamiura.pdf \|access-date=2018-03-10 \|archive-url=https://web.archive.org/web/20180310201310/http://www.city.mizunami.lg.jp/docs/2018030900014/files/bull44matsuokamiura.pdf \|archive-date=2018-03-10 \|url-status=dead }} \| Sp. nov \| Valid \| Matsuoka & Miura \| Pleistocene \| Katata Formation \| {{Flag\|Japan}} \| A species of Semisulcospira. \|
Semisulcospira (Biwamelania) nakamurai \| Sp. nov \| Valid \| Matsuoka & Miura \| Pleistocene \| Katata Formation \| {{Flag\|Japan}} \| A species of Semisulcospira. \|
Semisulcospira (Biwamelania) pseudomultigranosa \| Sp. nov \| Valid \| Matsuoka & Miura \| Pleistocene \| Katata Formation \| {{Flag\|Japan}} \| A species of Semisulcospira. \|
Semisulcospira (Biwamelania) pusilla \| Sp. nov \| Valid \| Matsuoka & Miura \| Pleistocene \| Katata Formation \| {{Flag\|Japan}} \| A species of Semisulcospira. \|
Semisulcospira (Biwamelania) spinulifera \| Sp. nov \| Valid \| Matsuoka & Miura \| Pleistocene \| Katata Formation \| {{Flag\|Japan}} \| A species of Semisulcospira. \|
Siphonalia morteni \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Siphonalia. \|
Siphonalia (Pseudoneptunea) semiruta{{cite book \|author1=A.A. Berezovsky \|author2=G.N. Girik \|year=2018 \|chapter=Pseudoneptunea (Gastropoda) В СРЕДНЕМ ЭОЦЕНЕ КРИВБАССА \|title=Сучасна геологічна наука і практика в дослідженнях студентів і молодих фахівців: Матеріали XIV Всеукраїнської науково-практичної конференції \|pages=73–77 \|chapter-url=https://www.researchgate.net/publication/329027737 }} \| Sp. nov \| Valid \| Berezovsky in Berezovsky & Girik \| Eocene \| \| {{Flag\|Ukraine}} \| A species of Siphonalia. \|
Siratus hirmetzli \| Sp. nov \| Valid \| Kovács \| Middle Miocene \| Sámsonháza Formation \| {{Flag\|Hungary}} \| A species of Siratus. \|
Sisenna inaequistriata \| Sp. nov \| Valid \| Nützel, Kaim & Grădinaru \| Middle Triassic (Anisian) \| \| {{Flag\|Romania}} \| A member of the family Gosseletinidae. \|
Sphaerocypraea camboritus{{Cite journal\|author=Jean-Michel Pacaud \|year=2018 \|title=Le genre Sphaerocypraea Schilder, 1927 (Mollusca, Gastropoda, Ovulidae) à l'Éocène du bassin de Paris. Description de deux espèces nouvelles \|journal=Fossiles. Revue française de paléontologie \|volume=36 \|pages=48–55 \|url=https://www.researchgate.net/publication/329153668 }} \| Sp. nov \| Valid \| Pacaud \| Eocene (Lutetian) \| \| {{Flag\|France}} \| A member of the family Ovulidae. \|
Sphaerocypraea gallica \| Sp. nov \| Valid \| Pacaud \| Eocene (Bartonian) \| Paris Basin \| {{Flag\|France}} \| A member of the family Ovulidae. \|
Straparollus obtectus \| Sp. nov \| Valid \| Harper \| Carboniferous (Mississippian) \| Gilmore City Formation \| {{Flag\|United States}} ({{Flag\|Iowa}}) \| A member of Euomphaloidea. \|
Subepona amitrovi \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona barbei \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona basilica \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona berezovskyi \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona caelatura \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona cattoi \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona cluzaudi \| Sp. nov \| Valid \| Pacaud \| Eocene (Bartonian) \| \| {{Flag\|France}} \| A member of the family Cypraeidae. \|
Subepona dilatata \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona exspectata \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona fusoides \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona gracillima \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona harmonica \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona hungarica{{Cite journal\|author1=Jean-Michel Pacaud \|author2=Zoltán Vicián \|year=2018 \|title=Description of a new species of Subepona Dolin et Lozouet, 2004 (Mollusca: Cypraeoidea) from the Lutetian (Middle Eocene) of Hungary \|journal=Fragmenta Palaeontologica Hungarica \|volume=35 \|pages=103–110 \|doi=10.17111/FragmPalHung.2018.35.103 \|s2cid=216966456 \|url=http://real.mtak.hu/134420/1/Fragm_paleont_hung_2018_Vol_35_103.pdf }} \| Sp. nov \| Valid \| Pacaud & Vicián \| Eocene (Lutetian) \| \| {{Flag\|Hungary}} \| A member of the family Cypraeidae. \|
Subepona insolita \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona javelina \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona laminata \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona notabilis \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona orbiculata \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona pacaudi{{Cite journal\|author=Daniel Ledon \|year=2018 \|title=Description d'une espèce nouvelle de Cypraeidae (Mollusca, Gastropoda) du Bartonien supérieur (Marinésien, Éocène moyen) du bassin de Paris \|journal=Xenophora Taxonomy \|volume=18 \|pages=3–6 \|url=https://www.researchgate.net/publication/322436573 }} \| Sp. nov \| Valid \| Ledon \| Eocene (Bartonian) \| \| {{Flag\|France}} \| A member of the family Cypraeidae. \|
Subepona rixatoria \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona romaneki \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona scutula \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona trigonella \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Subepona vultuosa \| Sp. nov \| Valid \| Dolin & Aguerre \| Eocene (Bartonian) \| \| {{Flag\|France}} \| \|
Taviania checchii \| Sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| \|
Taviania danaperensis \| Sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| \|
Taviania ukrainica \| Sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| \|
Tectarius isletaensis \| Sp. nov \| Valid \| Vera-Peláez in Martín-González et al. \| Late Miocene \| \| {{Flag\|Spain}} ({{Flag\|Canary Islands}}) \| A species of Tectarius. \|
Teinostoma obesum \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Teinostoma. \|
Terebralia marki \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A species of Terebralia. \|
Terebralia pauli \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A species of Terebralia. \|
Theodoxus susuzianus \| Sp. nov \| Valid \| Harzhauser, Neubauer & Hoşgör \| Late Oligocene or early Miocene \| Susuz Formation \| {{Flag\|Turkey}} \| A species of Theodoxus. \|
Timbellus danapris{{Cite journal\|author=Jean-Michel Pacaud \|year=2018 \|title=Timbellus danapris nov. sp., une espèce nouvelle de Muricidae (Mollusca, Gastropoda) du Priabonien (Éocène supérieur) de Dnipro (Oblast de Dnipropetrovsk, Ukraine) \|journal=Novapex \|volume=19 \|issue=4 \|pages=107–116 }} \| Sp. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Ukraine}} \| A species of Timbellus. \|
Timbellus priabonicus \| Nom. nov \| Valid \| Pacaud \| Eocene (Priabonian) \| \| {{Flag\|Germany}} \| A species of Timbellus; a replacement name for Murex trialatus von Koenen (1889). \|
Tomopleura furcata \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Tomopleura. \|
Tornus superlatus \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Tornus. \|
Trachytriton eliseae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| \|
Tragula saccoi{{Cite journal\|author1=Claudio Bongiardino \|author2=Pasquale Micali \|year=2018 \|title=On some interesting Pliocenic Pyramidellidae, with description of two new species \|journal=Bollettino Malacologico \|volume=54 \|issue=2 \|pages=101–106 }} \| Sp. nov \| Valid \| Bongiardino & Micali \| Pliocene \| \| {{Flag\|Italy}} \| A species of Tragula. \|
Triphora buscheri \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Triphora. \|
Triphora chauvereauensis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Triphora. \|
Triphora fernandezgarcesi \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Triphora. \|
Triphora lherbettorum \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Triphora. \|
Triphora miopygmaea \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Triphora. \|
Triphora sancticlementensis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Triphora. \|
Triplostephanus wilfordi \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Triplostephanus. \|
Tristeirostoma \| Gen. et sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A member of Pyramidelloidea of uncertain phylogenetic placement. The type species is T. saxaquadrata. \|
Trivia sceauxensis \| Sp. nov \| Valid \| Landau, Ceulemans & Van Dingenen \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A species of Trivia. \|
Triviella angushawkei{{Cite journal\|author1=Dirk Fehse \|author2=Jozef Grego \|year=2018 \|title=Contributions to the knowledge of the Triviidae, XXXVI: New fossil species in the genus Triviella Jousseaume, 1884 (Mollusca: Gastropoda: Trivioidea) from South Australia \|journal=Conchylia \|volume=49 \|issue=1–2 \|pages=29–34 }} \| Sp. nov \| Valid \| Fehse & Grego \| Eocene \| \| {{Flag\|Australia}} \| A species of Triviella. \|
Triviella korneli \| Sp. nov \| Valid \| Fehse & Grego \| Eocene \| \| {{Flag\|Australia}} \| A species of Triviella. \|
Truncaria benjamini \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| \|
Tryonia globosa{{Cite journal\|author1=Lívia Isadora de Almeida Guimarães \|author2=Maria Inês Feijó Ramos \|author3=Luiz Ricardo Lopes de Simone \|year=2018 \|title=New records of Tryonia (Gastropoda, Cochliopidae) from the Mio–Pliocene Solimões Formation (State of Amazonas), Brazil \|journal=Revista Brasileira de Paleontologia \|volume=21 \|issue=3 \|pages=255–264 \|doi=10.4072/rbp.2018.3.06 \|doi-access=free }} \| Sp. nov \| Valid \| Guimarães, Ramos & de Simone \| Miocene–Pliocene \| Solimões Formation \| {{Flag\|Brazil}} \| A species of Tryonia. \|
Turbonilla tabanellii \| Sp. nov \| Valid \| Bongiardino & Micali \| Pliocene \| \| {{Flag\|Italy}} \| A species of Turbonilla. \|
Turricula vibekeae \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Turricula. \|
Turritella amitava{{Cite journal\|author1=Shiladri S. Das \|author2=Sandip Saha \|author3=Subhendu Bardhan \|author4=Sumanta Mallick \|author5=Warren D. Allmon \|year=2018 \|title=The oldest turritelline gastropods: from the Oxfordian (Upper Jurassic) of Kutch, India \|journal=Journal of Paleontology \|volume=92 \|issue=3 \|pages=373–387 \|doi=10.1017/jpa.2017.89 \|bibcode=2018JPal...92..373D \|s2cid=135438872 }} \| Sp. nov \| Valid \| Das et al. \| Uncertain; Late Jurassic or Miocene{{Cite journal\|author1=Franz T. Fürsich \|author2=Suraj Bhosale \|author3=Matthias Alberti \|author4=Dhirendra K. Pandey \|year=2023 \|title=Miocene instead of Jurassic: the importance of sound fieldwork for paleontological data analysis \|journal=Journal of Paleontology \|volume=97 \|issue=2 \|pages=341–346 \|doi=10.1017/jpa.2022.106 \|bibcode=2023JPal...97..341F \|s2cid=256152398 }} \| Chari Formation \| {{Flag\|India}} \| A species of Turritella. \|
Turritella capistrata \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A species of Turritella. \|
Turritella dhosaensis \| Sp. nov \| Valid \| Das et al. \| Uncertain; Late Jurassic or Miocene \| Chari Formation \| {{Flag\|India}} \| A species of Turritella. \|
Unedogemmula nuttalli \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Unedogemmula. \|
Valvata koehleri \| Sp. nov \| Valid \| Harzhauser, Neubauer & Hoşgör \| Late Oligocene or early Miocene \| Susuz Formation \| {{Flag\|Turkey}} \| A species of Valvata. \|
Valvata mathiasi{{Cite journal\|author1=Daniela Esu \|author2=Odoardo Girotti \|s2cid=56261523 \|year=2018 \|title=Valvata mathiasi n. sp. (Gastropoda: Heterobranchia: Valvatidae) from the Lower Pliocene of the Val di Pesa (Tuscany, Central Italy) \|journal=Archiv für Molluskenkunde: International Journal of Malacology \|volume=147 \|issue=1 \|pages=49–54 \|doi=10.1127/arch.moll/147/049-054 }} \| Sp. nov \| Valid \| Esu & Girotti \| Early Pliocene \| \| {{Flag\|Italy}} \| A species of Valvata. \|
Vertigo antipygmaea \| Sp. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Poland}} \| A species of Vertigo. \|
Vitrea angustaeumbilicata \| Sp. nov \| Valid \| Harzhauser & Neubauer \| Miocene \| \| {{Flag\|Poland}} \| A species of Vitrea. \|
Willungia felix{{Cite journal\|author=Dirk Fehse \|year=2018 \|title=A new species of the genus Willungia Powell 1938 (Mollusca: Gastropoda: Cypraeoidea) from Tasmania \|journal=Conchylia \|volume=48 \|issue=3–4 \|pages=59–63 }} \| Sp. nov \| Valid \| Fehse \| Early Miocene \| \| {{Flag\|Australia}} \| A member of Cypraeoidea. \|
Wollastonia beckmanni \| Sp. nov \| Valid \| De Mattia & Groh in De Mattia, Neiber & Groh \| Quaternary \| \| {{Flag\|Portugal}} ({{Flag\|Madeira}}) \| A member of Helicoidea belonging to the family Geomitridae. \|
Wollastonia falknerorum \| Sp. nov \| Valid \| Groh, Neiber & De Mattia in De Mattia, Neiber & Groh \| Quaternary \| \| {{Flag\|Portugal}} ({{Flag\|Madeira}}) \| A member of Helicoidea belonging to the family Geomitridae. \|
Wollastonia inexpectata \| Sp. nov \| Valid \| De Mattia & Groh in De Mattia, Neiber & Groh \| Quaternary \| \| {{Flag\|Portugal}} ({{Flag\|Madeira}}) \| A member of Helicoidea belonging to the family Geomitridae. \|
Wollastonia ripkeni \| Sp. nov \| Valid \| De Mattia & Groh in De Mattia, Neiber & Groh \| Quaternary \| \| {{Flag\|Portugal}} ({{Flag\|Madeira}}) \| A member of Helicoidea belonging to the family Geomitridae. \|
Worthenia (Humiliworthenia) anisica \| Sp. nov \| Valid \| Nützel, Kaim & Grădinaru \| Middle Triassic (Anisian) \| \| {{Flag\|Romania}} \| \|
Worthenia (Humiliworthenia) microstriata \| Sp. nov \| Valid \| Nützel, Kaim & Grădinaru \| Middle Triassic (Anisian) \| \| {{Flag\|Romania}} \| A member of Pleurotomariida belonging to the superfamily Pleurotomarioidea and possibly to the family Wortheniellidae. Originally described as a species of Worthenia; Monari & Dellantonio (2024) transferred it to the genus Dimorphotomaria.{{Cite journal\|author1=Stefano Monari \|author2=Elio Dellantonio \|year=2024 \|title=Pleurotomariida (Gastropoda) from the upper Anisian platform carbonates of the Dolomites (Southern Alps, Italy): systematics, palaeobiogeography and Triassic recovery \|journal=Papers in Palaeontology \|volume=10 \|issue=2 \|at=e1545 \|doi=10.1002/spp2.1545 \|doi-access=free \|bibcode=2024PPal...10E1545M }} \|
Worthenia (Worthenia) dobrogeana \| Sp. nov \| Valid \| Nützel, Kaim & Grădinaru \| Middle Triassic (Anisian) \| \| {{Flag\|Romania}} \| \|
Xanthodaphne pederzanii{{Cite journal\|author1=Cesare Tabanelli \|author2=Claudio Bongiardino \|year=2018 \|title=Una nuova Xanthodaphne nella serie marina plio-pleistocenica della Romagna con notizie sulla sua ecologia e distribuzione temporale (Gastropoda: Conoidea: Raphitomidae) \|journal=Bollettino Malacologico \|volume=54 \|issue=2 \|pages=188–194 }} \| Sp. nov \| Valid \| Tabanelli & Bongiardino \| Pliocene-Pleistocene \| \| {{Flag\|Italy}} \| A species of Xanthodaphne. \|
Ziba waltercernohorskyi \| Sp. nov \| Valid \| Harzhauser et al. \| Miocene (Tortonian) \| Seria Formation \| {{Flag\|Brunei}} \| A species of Ziba. \|

Other molluscs

=Research=

A study on patterns of subtle morphological variation in two assemblages of the Cambrian helcionelloid Mackinnonia rostrata from the Shackleton Limestone of Antarctica and Ajax Limestone of Australia, and an assemblage of M. taconica from the Bastion Formation of Greenland, is published by Jackson & Claybourn (2018).{{Cite journal|author1=Illiam S. C. Jackson |author2=Thomas M. Claybourn |year=2018 |title=Morphometric analysis of inter- and intraspecific variation in the Cambrian helcionelloid mollusc Mackinnonia |journal=Palaeontology |volume=61 |issue=5 |pages=761–773 |doi=10.1111/pala.12368 |bibcode=2018Palgy..61..761J |s2cid=134910307 }}
The oldest known evidence of trematode parasitism of bivalves in the form of igloo-shaped traces found on shells of the freshwater bivalve Sphaerium is reported from the Upper Cretaceous Judith River Formation (Montana, United States) by Rogers et al. (2018).{{Cite journal|author1=Raymond R. Rogers |author2=Kristina A. Curry Rogers |author3=Brian C. Bagley |author4=James J. Goodin |author5=Joseph H. Hartman |author6=Jeffrey T. Thole |author7=Michał Zatoń |year=2018 |title=Pushing the record of trematode parasitism of bivalves upstream and back to the Cretaceous |journal=Geology |volume=46 |issue=5 |pages=431–434 |doi=10.1130/G40035.1 |bibcode=2018Geo....46..431R }}
A study evaluating the association of past climate changes with extinction in Cenozoic marine bivalves is published by Edie et al. (2018).{{Cite journal|author1=Stewart M. Edie |author2=Shan Huang |author3=Katie S. Collins |author4=Kaustuv Roy |author5=David Jablonski |year=2018 |title=Loss of biodiversity dimensions through shifting climates and ancient mass extinctions |journal=Integrative and Comparative Biology |volume=58 |issue=6 |pages=1179–1190 |doi=10.1093/icb/icy111 |pmid=30204879 }}
The oldest known shipworms reported so far, preserved with silicified soft parts, are described from the mid-Cretaceous logs of the Envigne Valley (France) by Robin et al. (2018).{{Cite journal|author1=Ninon Robin |author2=Marcel Velasquez |author3=Anaïs Boura |author4=Géraldine Garcia |author5=Clément Jauvion |author6=Jean-Marie Boiteau |author7=Bernard Gomez |author8=Véronique Daviero-Gomez |author9=Xavier Valentin |year=2018 |title=The oldest shipworms (Bivalvia, Pholadoidea, Teredinidae) preserved with soft parts (western France): insights into the fossil record and evolution of Pholadoidea |journal=Palaeontology |volume=61 |issue=6 |pages=905–918 |doi=10.1111/pala.12376 |bibcode=2018Palgy..61..905R |s2cid=134159664 }}
A study on the taphonomy and paleoecology of oyster mass occurrences from the Cretaceous (Hauterivian) Neuquén Basin (west-central Argentina), dominated by the gryphaeid small oyster Ceratostreon, is published by Toscano, Lazo & Luci (2018).{{Cite journal|author1=Agustina G. Toscano |author2=Darío G. Lazo |author3=Leticia Luci |year=2018 |title=Taphonomy and paleoecology of Lower Cretaceous oyster mass occurrences from west-central Argentina and evolutionary paleoecology of gregariousness in oysters |journal=PALAIOS |volume=33 |issue=6 |pages=237–255 |doi=10.2110/palo.2017.096 |bibcode=2018Palai..33..237T |hdl=11336/84843 |s2cid=133927666 }}
Evidence of exceptional preservation in the nacre and prismatic layers of a 66-million-years-old bivalve shell (of a member of the genus Pinna from the Owl Creek Formation, Mississippi, United States) is presented by Myers et al. (2018).{{Cite journal|author1=Corinne E. Myers |author2=Kristin D. Bergmann |author3=Chang-Yu Sun |author4=Nicholas Boekelheide |author5=Andrew H. Knoll |author6=Pupa U.P.A Gilbert |year=2018 |title=Exceptional preservation of organic matrix and shell microstructure in a Late Cretaceous Pinna fossil revealed by photoemission electron spectromicroscopy |journal=Geology |volume=46 |issue=8 |pages=711–714 |doi=10.1130/G45271.1 |bibcode=2018Geo....46..711M |s2cid=134594821 |url=https://escholarship.org/uc/item/0wd797jh }}
A study on the allometric growth of shells of the Cenozoic burrowing bivalves Claibornicardia paleopatagonica and Crassatella kokeni from Argentina is published by Perez & Santelli (2018).{{Cite journal|author1=Damián Eduardo Perez |author2=María Belén Santelli |year=2018 |title=Allometric shell growth in infaunal burrowing bivalves: examples of the archiheterodonts Claibornicardia paleopatagonica (Ihering, 1903) and Crassatella kokeni Ihering, 1899 |journal=PeerJ |volume=6 |pages=e5051 |doi=10.7717/peerj.5051 |pmid=29942699 |pmc=6014312 |doi-access=free }}
Macrobioerosion of silicate siltstone rocks caused by extant rock-boring mussels is reported from a freshwater section of the Kaladan River (Myanmar) by Bolotov et al. (2018), who note the similarity of recent Kaladan borings to borings assigned to the ichnotaxon Gastrochaenolites anauchen from the Carboniferous deposits of the United States, and interpret their discovery as indicating that rocks with macroborings and fossilized members of rock-boring communities are not necessarily a direct indicator of shallow marine paleo-environments, but may also reflect freshwater habitats.{{Cite journal|author1=Ivan N. Bolotov |author2=Olga V. Aksenova |author3=Torkild Bakken |author4=Christopher J. Glasby |author5=Mikhail Yu. Gofarov |author6=Alexander V. Kondakov |author7=Ekaterina S. Konopleva |author8=Manuel Lopes-Lima |author9=Artyom A. Lyubas |author10=Yu Wang |author11=Andrey Yu. Bychkov |author12=Agniya M. Sokolova |author13=Kitti Tanmuangpak |author14=Sakboworn Tumpeesuwan |author15=Ilya V. Vikhrev |author16=J. Bruce H. Shyu |author17=Than Win |author18=Oleg S. Pokrovsky |year=2018 |title=Discovery of a silicate rock-boring organism and macrobioerosion in fresh water |journal=Nature Communications |volume=9 |issue=1 |pages=Article number 2882 |doi=10.1038/s41467-018-05133-4 |pmid=30038289 |pmc=6056532 |bibcode=2018NatCo...9.2882B }}
A study comparing declines in taxonomic and functional diversity in marine bivalves during the Permian–Triassic extinction event, Cretaceous–Paleogene extinction event and in present times is published by Edie, Jablonski & Valentine (2018).{{Cite journal|author1=Stewart M. Edie |author2=David Jablonski |author3=James W. Valentine |year=2018 |title=Contrasting responses of functional diversity to major losses in taxonomic diversity |journal=Proceedings of the National Academy of Sciences of the United States of America |volume=115 |issue=4 |pages=732–737 |doi=10.1073/pnas.1717636115 |pmid=29305556 |pmc=5789943 |doi-access=free |bibcode=2018PNAS..115..732E }}

=New taxa=

Name ! Novelty ! Status ! Authors ! Age ! Unit ! Location ! Notes ! Images
class="wikitable sortable" align="center" width="100%"
Abra rossii{{Cite journal \|author1=Maria Cristina Bonci \|author2=Gian Mario Dabove \|author3=Michele Piazza \|year=2018 \|title=The Oligocene mollusc types of Gaetano Rovereto from Santa Giustina and Sassello (NW Italy) \|journal=Carnets de Géologie \|volume=18 \|issue=12 \|pages=281–303 \|doi=10.4267/2042/68549 \|doi-access=free }} \| Nom. nov \| Valid \| Bonci, Dabove & Piazza \| Oligocene \| Molare Formation \| {{Flag\|Italy}} \| A bivalve belonging to the family Semelidae, a species of Abra; a replacement name for Syndesmya intermedia Rovereto (1898). \|
Acanthochitona andegavensis{{Cite journal\|author1=Bruno Dell'Angelo \|author2=Bernard M. Landau \|author3=Frank Van Dingenen \|author4=Luc Ceulemans \|year=2018 \|title=The upper Miocene chitons of northwest France (Mollusca: Polyplacophora) \|journal=Zootaxa \|volume=4447 \|issue=1 \|pages=1–62 \|doi=10.11646/zootaxa.4447.1.1 \|pmid=30313867 \|s2cid=52975018 }} \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton; a species of Acanthochitona. \|
Acanthochitona chauvereauensis \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton; a species of Acanthochitona. \|
Acanthochitona globosa \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton; a species of Acanthochitona. \|
Acutostrea gaviota{{Cite journal \|author=Richard L. Squires \|year=2018 \|title=Paleocene and Eocene oysters from the west coast of the United States: revision of named species and recognition of new species \|journal=Contributions in Science \|volume=526 \|pages=1–29 \|doi=10.5962/p.320145 \|s2cid=155099286 \|url=https://www.biodiversitylibrary.org/part/320145 }} \| Sp. nov \| Valid \| Squires \| Late Eocene \| Alegria Formation Gaviota Formation Wheatland Formation \| {{Flag\|United States}} ({{Flag\|California}}) \| A true oyster. \|
Adacna yaninae{{Cite journal\|author1=Yeşim Büyükmeriç \|author2=Frank P. Wesselingh \|year=2018 \|title=New cockles (Bivalvia: Cardiidae: Lymnocardiinae) from Late Pleistocene Lake Karapınar (Turkey): Discovery of a Pontocaspian refuge? \|journal=Quaternary International \|volume=465, Part A \|pages=37–45 \|doi=10.1016/j.quaint.2016.03.018 \|bibcode=2018QuInt.465...37B }} \| Sp. nov \| Valid \| Büyükmeriç & Wesselingh \| Late Pleistocene \| \| {{Flag\|Turkey}} \| A cockle. \|
Akardita{{Cite journal\|author1=Rafael La Perna \|author2=Mauro M. Brunetti \|author3=Giano Della Bella \|year=2018 \|title=Systematic position of two Pliocene carditids with description of Akardita n. gen. and A. iberica n. sp. (Bivalvia: Carditidae) \|journal=Zootaxa \|volume=4379 \|issue=2 \|pages=215–230 \|doi=10.11646/zootaxa.4379.2.4 \|pmid=29689985 }} \| Gen. et comb. et sp. nov \| Valid \| La Perna, Brunetti & Della Bella \| Pliocene to recent \| \| {{Flag\|Italy}} {{Flag\|Spain}} West Africa \| A bivalve belonging to the family Carditidae. The type species is the Pliocene species "Cardita" subrevoluta de Stefani (1888) from Italy; genus also includes new species Akardita iberica from the Pliocene of Spain, as well as extant species Cardita (Venericardia) monodi Nicklès (1953) from West Africa. \|
Aksumya{{Cite journal\|author=Steffen Kiel \|year=2018 \|title=Three new bivalve genera from Triassic hydrocarbon seep deposits in southern Turkey \|journal=Acta Palaeontologica Polonica \|volume=63 \|issue=2 \|pages=221–234 \|doi=10.4202/app.00466.2018 \|doi-access=free }} \| Gen. et sp. nov \| Valid \| Kiel \| Late Triassic (late Carnian, possibly also Norian) \| \| {{Flag\|Turkey}} {{Flag\|United States}}? \| A bivalve belonging to the group Anomalodesmata and the superfamily Pholadomyoidea. The type species is A. krystyni. \|
"Anodontia" mioinflata{{Cite journal\|author1=Steffen Kiel \|author2=Marco Sami \|author3=Marco Taviani \|year=2018 \|title=A serpulid-Anodontia-dominated methane-seep deposit from the upper Miocene of northern Italy \|journal=Acta Palaeontologica Polonica \|volume=63 \|issue=3 \|pages=569–577 \|doi=10.4202/app.00472.2018 \|doi-access=free }} \| Sp. nov \| Valid \| Kiel, Sami & Taviani \| Late Miocene \| \| {{Flag\|Italy}} \| A bivalve belonging to the family Lucinidae; a species of Anodontia sensu lato. \|
Astarte (Astarte) paleocenica \| Sp. nov \| Valid \| Amano & Jenkins in Amano, Jenkins & Kurita \| Paleocene \| Katsuhira Formation \| {{Flag\|Japan}} \| A species of Astarte. \|
?Atrina rosenkrantzi \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| Possibly a species of Atrina. \|
Callochiton pouweri \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton, a species of Callochiton. \|
Cardilia edwardsi{{Cite journal\|author1=Javier H. Signorelli \|author2=J.G.M. (Han) Raven \|year=2018 \|title=Current knowledge of the family Cardiliidae (Bivalvia, Mactroidea) \|journal=Journal of Paleontology \|volume=92 \|issue=2 \|pages=130–145 \|doi=10.1017/jpa.2017.86 \|bibcode=2018JPal...92..130S \|hdl=11336/88338 \|s2cid=134282379 }} \| Sp. nov \| Valid \| Signorelli & Raven \| Eocene (Bartonian) \| Becton Formation \| {{Flag\|United Kingdom}} \| A bivalve belonging to the family Cardiliidae. \|
Carolinapecten corpulentus{{Cite journal\|author=Thomas R. Waller \|year=2018 \|title=Systematics and biostratigraphy of Chesapecten and Carolinapecten (Mollusca: Bivalvia: Pectinidae) in the upper Miocene and Pliocene "Lower Tamiami Formation" of southwestern Florida \|journal=Bulletin of the Florida Museum of Natural History \|volume=56 \|issue=1 \|pages=1–47 \|doi=10.58782/flmnh.ublr4862 \|url=https://www.floridamuseum.ufl.edu/files/9815/3022/4121/vol56no1archival.pdf }} \| Sp. nov \| Valid \| Waller \| Late Miocene \| Peace River Formation \| {{flag\|United States}} ({{flag\|Florida}}) \| A scallop. \|
Carolinapecten murdockensis \| Sp. et 3 subsp. nov \| Valid \| Waller \| Late Miocene \| Peace River Formation \| {{flag\|United States}} ({{flag\|Florida}}) \| A scallop. This species includes new subspecies C. murdockensis druidwilsoni, C. murdockensis murdockensis and C. murdockensis parawatsonensis. \|
Caspiconcha basquensis{{Cite journal\|author1=Robert G. Jenkins \|author2=Andrzej Kaim \|author3=Yoshinori Hikida \|author4=Steffen Kiel \|year=2018 \|title=Four new species of the Jurassic to Cretaceous seep-restricted bivalve Caspiconcha and implications for the history of chemosynthetic communities \|journal=Journal of Paleontology \|volume=92 \|issue=4 \|pages=596–610 \|doi=10.1017/jpa.2018.7 \|bibcode=2018JPal...92..596J \|s2cid=135307948 }} \| Sp. nov \| Valid \| Jenkins et al. \| Early Cretaceous (late Albian) \| \| {{Flag\|Spain}} \| A kalenterid bivalve. \|
Caspiconcha lastsamurai \| Sp. nov \| Valid \| Jenkins et al. \| Late Cretaceous (Campanian) \| \| {{Flag\|Japan}} \| A kalenterid bivalve. \|
Caspiconcha raukumaraensis \| Sp. nov \| Valid \| Jenkins et al. \| Cretaceous (late Albian to mid-Cenomanian) \| \| {{Flag\|New Zealand}} \| A kalenterid bivalve. \|
Caspiconcha yubariensis \| Sp. nov \| Valid \| Jenkins et al. \| Early Cretaceous (late Albian) \| \| {{Flag\|Japan}} \| A kalenterid bivalve. \|
Chesapecten madisonius sarasotensis \| Subsp. nov \| Valid \| Waller \| Pliocene \| \| {{flag\|United States}} ({{flag\|Florida}}) \| A scallop. \|
Chesapecten middlesexensis bayshorensis \| Subsp. nov \| Valid \| Waller \| Late Miocene \| Peace River Formation \| {{flag\|United States}} ({{flag\|Florida}}) \| A scallop. \|
Chesapecten middlesexensis hunterae \| Subsp. nov \| Valid \| Waller \| Late Miocene \| Peace River Formation \| {{flag\|United States}} ({{flag\|Florida}}) \| A scallop. \|
Chesapecten quinarius \| Sp. nov \| Valid \| Waller \| Pliocene \| \| {{flag\|United States}} ({{flag\|Florida}}) \| A scallop. \|
Chokekenia{{Cite journal\|author1=María B. Santelli \|author2=Claudia J. del Río \|year=2018 \|title=Neogene Pectinidae (Bivalvia) of tribe Chlamydini Teppner, 1922 in Patagonia (Argentina): Zygochlamys Ihering, 1907 and three new genera \|journal=Journal of Paleontology \|volume=93 \|issue=2 \|pages=312–336 \|doi=10.1017/jpa.2018.75 \|s2cid=134010742 }} \| Gen. et comb. nov \| Valid \| Santelli & del Río \| Early Miocene \| \| {{flag\|Argentina}} \| A scallop. The type species is "Zygochlamys" nicolasi Morra (1985). \|
Connexochiton vivesi{{Cite journal\|author1=Bruno Dell’Angelo \|author2=Jean-Francois Lesport \|author3=Alain Cluzaud \|author4=Maurizio Sosso \|year=2018 \|title=The Oligocene to Miocene chitons (Mollusca: Polyplacophora) of the Aquitaine Basin, southwestern France, and Ligerian Basin, western France. Part 1: Leptochitonidae, Hanleyidae, Ischnochitonidae, Chitonidae, Spinochitonidae fam. nov. and Schizochitonidae \|journal=Bollettino Malacologico \|volume=54 \|issue=1 \|pages=1–47 \|url=https://www.researchgate.net/publication/325949315 }} \| Sp. nov \| Valid \| Dell'Angelo et al. \| \| \| {{Flag\|France}} \| A chiton. \|
Crassatella affinis \| Sp. nov \| Valid \| Berezovsky \| Late Eocene \| \| {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. \|
Crassatella ballista{{Cite journal\|author=A. A. Berezovsky \|year=2018 \|title=New species of Crassatellidae (Bivalvia) from the Middle Eocene of Ukraine \|journal=Paleontological Journal \|volume=52 \|issue=5 \|pages=481–490 \|doi=10.1134/S0031030118050027 \|bibcode=2018PalJ...52..481B \|s2cid=92686929 \|url=https://elibrary.ru/item.asp?id=35524923 }} \| Sp. nov \| Valid \| Berezovsky \| Middle Eocene \| \| {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. \|
Crassatella calva \| Sp. nov \| Valid \| Berezovsky \| Middle Eocene \| \| {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. \|
Crassatella ignara{{Cite journal\|author=A. A. Berezovsky \|year=2018 \|title=Upper Eocene bivalves from Dnepr, Ukraine: Crassatellidae \|journal=Paleontological Journal \|volume=52 \|issue=11 \|pages=1225–1291 \|doi=10.1134/S0031030118110035 \|bibcode=2018PalJ...52.1225B \|s2cid=92606642 }} \| Sp. nov \| Valid \| Berezovsky \| Late Eocene \| Mandrikovka Beds \| {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. \|
Crassatella laboriosa \| Sp. nov \| Valid \| Berezovsky \| Late Eocene \| \| {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. \|
Crassatella necopina{{Cite journal\|author=A. A. Berezovsky \|year=2018 \|title=Some new species of Crassatella (Bivalvia) from the Upper Eocene of Ukraine \|journal=Paleontological Journal \|volume=52 \|issue=1 \|pages=9–17 \|doi=10.1134/S0031030118010057 \|bibcode=2018PalJ...52....9B \|s2cid=90885240 \|url=https://elibrary.ru/item.asp?id=32290529 }} \| Sp. nov \| Valid \| Berezovsky \| Late Eocene \| Mandrikovka Beds \| {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. \|
Crassatella personata \| Sp. nov \| Valid \| Berezovsky \| Late Eocene \| Mandrikovka Beds \| {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. \|
Crassatella singulata \| Sp. nov \| Valid \| Berezovsky \| Late Eocene \| Mandrikovka Beds \| {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. Berezovsky (2018) subsequently made it the type species of a new subgenus Crassatella (Furvusa). \|
Crassatina conquisita{{cite journal \|author=A. A. Berezovsky \|year=2018 \|title=New species of Crassatina (Bivalvia) from the Middle and Upper Eocene of Ukraine \|journal=Paleontological Journal \|volume=52 \|issue=4 \|pages=351–364 \|doi=10.1134/S0031030118040044 \|bibcode=2018PalJ...52..351B \|s2cid=91833745 }} \| Sp. nov \| Valid \| Berezovsky \| Late Eocene \| Mandrikovka Beds \| {{Flag\|Ukraine}} \| A bivalve. \|
Crassatina insolita \| Sp. nov \| Valid \| Berezovsky \| Late Eocene \| Mandrikovka Beds \| {{Flag\|Ukraine}} \| A bivalve. Transferred to the genus Chattonia by Berezovsky (2018). \|
Crassatina obscura \| Sp. nov \| Valid \| Berezovsky \| Late Eocene \| \| {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. \|
Crassatina subcostata \| Sp. nov \| Valid \| Berezovsky \| Middle Eocene \| \| {{Flag\|Ukraine}} \| A bivalve. \|
Crassostrea tectonica \| Sp. nov \| Valid \| Squires \| Middle Eocene \| Coldwater Formation Domengine Formation Matilija Sandstone Santiago Formation \| {{Flag\|United States}} ({{Flag\|California}}) \| A true oyster, a species of Crassostrea. \|
Crassovella \| Gen. et comb. et 2 sp. nov \| Valid \| Berezovsky \| Late Eocene \| \| {{Flag\|Germany}} {{Flag\|Poland}} {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. The type species is "Crassatella" raricostata Klushnikov (1958); genus also includes "Crassatella" woodi Koenen (1865), as well as new species C. depulsor and C. faber. \|
Cubitostrea californiana \| Sp. nov \| Valid \| Squires \| Late early Eocene \| Ardath Shale Llajas Formation \| {{Flag\|United States}} ({{Flag\|California}}) \| A true oyster. \|
Cuspidaria anderseni \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Cuspidaria. \|
Cuspidaria heilmannclauseni \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Cuspidaria. \|
Cyrtokolymia bobini{{Cite journal\|author=A. S. Biakov \|year=2018 \|title=New species of Inoceramus-like bivalves of the subfamily Kolymiinae from the Middle Permian of Northeastern Asia \|journal=Paleontological Journal \|volume=52 \|issue=1 \|pages=1–8 \|doi=10.1134/S0031030118010069 \|bibcode=2018PalJ...52....1B \|s2cid=90456192 }} \| Sp. nov \| Valid \| Biakov \| Middle Permian \| \| {{Flag\|Russia}} \| An Inoceramus-like bivalve belonging to the family Kolymiidae. \|
Debrunia acuta{{Cite journal\|author1=Jean-Pierre Masse \|author2=Mukerrem Fenerci-Masse \|year=2018 \|title=Taxonomy and stratigraphy of Early Cretaceous species of Debrunia Masse and Fenerci-Masse (Hippuritida, Monopleuridae) of the Mediterranean region \|journal=Cretaceous Research \|volume=84 \|pages=32–61 \|doi=10.1016/j.cretres.2017.09.016 \|bibcode=2018CrRes..84...32M }} \| Sp. nov \| Valid \| Masse & Fenerci-Masse \| Early Cretaceous (Hauterivian) \| \| {{Flag\|France}} \| A rudist bivalve belonging to the family Monopleuridae. \|
Debrunia elongata \| Sp. nov \| Valid \| Masse & Fenerci-Masse \| Early Cretaceous (Aptian, possibly Albian) \| Serdj Formation \| {{Flag\|Algeria}} {{Flag\|Bosnia and Herzegovina}} {{Flag\|Italy}} {{Flag\|Spain}} {{Flag\|Tunisia}} {{Flag\|Turkey}}? \| A rudist bivalve belonging to the family Monopleuridae. \|
Debrunia heliomorpha \| Sp. nov \| Valid \| Masse & Fenerci-Masse \| Early Cretaceous (Hauterivian) \| \| {{Flag\|France}} \| A rudist bivalve belonging to the family Monopleuridae. \|
Debrunia massiliana \| Sp. nov \| Valid \| Masse & Fenerci-Masse \| Early Cretaceous (Valanginian) \| \| {{Flag\|France}} \| A rudist bivalve belonging to the family Monopleuridae. \|
Debrunia tunesiana \| Sp. nov \| Valid \| Masse & Fenerci-Masse \| Early Cretaceous (Hauterivian) \| Bou Hedma Formation \| {{Flag\|Tunisia}} \| A rudist bivalve belonging to the family Monopleuridae. \|
Debrunia ucetiae \| Sp. nov \| Valid \| Masse & Fenerci-Masse \| Early Cretaceous (Barremian and Aptian) \| \| {{Flag\|France}} \| A rudist bivalve belonging to the family Monopleuridae. \|
Elliptiolucina neozelandica{{Cite journal\|author1=Kazutaka Amano \|author2=Crispin T.S. Little \|author3=Kathleen A. Campbell \|year=2018 \|title=Lucinid bivalves from Miocene hydrocarbon seep sites of eastern North Island, New Zealand, with comments on Miocene New Zealand seep faunas \|journal=Acta Palaeontologica Polonica \|volume=63 \|issue=2 \|pages=371–382 \|doi=10.4202/app.00461.2018 \|doi-access=free }} \| Sp. nov \| Valid \| Amano, Little & Campbell \| Miocene \| Bexhaven Limestone \| {{Flag\|New Zealand}} \| A bivalve belonging to the family Lucinidae. \|
Eucrassatella depulsoris \| Sp. nov \| Valid \| Berezovsky \| Middle Eocene \| \| {{Flag\|Ukraine}} \| A bivalve belonging to the family Crassatellidae. \|
Hanleya sancticlementensis \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton. \|
Hanleya sossoi \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton. \|
Hebecardium lapideus{{cite book \|author=A.A. Berezovsky \|year=2018 \|chapter=НОВЫЙ ВИД Hebecardium (Bivalvia) ИЗ ЭОЦЕНОВЫХ ОТЛОЖЕНИЙ КРИВОГО РОГА \|title=Проблеми теоретичної і прикладної мінералогії, геології, металогенії гірничодобувних регіонів: Матеріали XI Міжнародної науково-практичної конференції \|pages=5–10 \|chapter-url=https://www.researchgate.net/publication/329374780 }} \| Sp. nov \| Valid \| Berezovsky \| Eocene \| \| {{Flag\|Ukraine}} \| A cockle. \|
Incanopsis fastigiata{{Cite journal\|author=Thomas J. DeVries \|year=2018 \|title=Early Paleogene brackish-water molluscs from the Caballas Formation of the East Pisco Basin (Southern Peru) \|journal=Journal of Natural History \|volume=53 \|issue=25–26 \|pages=1533–1584 \|doi=10.1080/00222933.2018.1524032 \|s2cid=91666976 }} \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A bivalve belonging to the family Noetiidae. \|
Incatina \| Gen. et sp. nov \| Valid \| DeVries \| Early Eocene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A bivalve belonging to the family Crassatellidae. The type species is I. collinsae. \|
Ischnochiton nitidum \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton, a species of Ischnochiton. \|
Ischnochiton renardi \| Sp. nov \| Valid \| Dell'Angelo et al. \| \| \| {{Flag\|France}} \| A chiton, a species of Ischnochiton. \|
Kasimlara \| Gen. et sp. nov \| Valid \| Kiel \| Late Triassic (late Carnian) \| \| {{Flag\|Turkey}} \| A bivalve belonging to the group Carditida and the family Kalenteridae. The type species is K. kosuni. \|
Kolymia peregoedovi{{Cite journal\|author1=A. S. Biakov \|author2=R. V. Kutygin \|year=2018 \|title=Bivalves from the Delendzhian–Dulgalakhian boundary beds of the Middle Permian of the lower reaches of the Lena River (northern Verkhoyansk Region, northern Siberia) \|journal=Paleontological Journal \|volume=52 \|issue=7 \|pages=761–767 \|doi=10.1134/S0031030118070031 \|bibcode=2018PalJ...52..761B \|s2cid=91733883 }} \| Sp. nov \| Valid \| Biakov & Kutygin \| Middle Permian \| \| {{Flag\|Russia}} ({{Flag\|Sakha Republic}}) \| A bivalve. \|
Kolymia pontoneica \| Sp. nov \| Valid \| Biakov \| Middle Permian \| \| {{Flag\|Russia}} \| An Inoceramus-like bivalve belonging to the family Kolymiidae. \|
Kolymia posneri \| Sp. nov \| Valid \| Muromzeva, Kusnezov & Biakov in Biakov et al. \| Middle Permian \| Delezhinskaya Formation \| {{Flag\|Russia}} \| An Inoceramus-like bivalve belonging to the family Kolymiidae. \|
Kolymia simkiniformis \| Sp. nov \| Valid \| Biakov \| Middle Permian \| \| {{Flag\|Russia}} \| An Inoceramus-like bivalve belonging to the family Kolymiidae. \|
Leptochiton aturriensis \| Sp. nov \| Valid \| Dell'Angelo et al. \| \| \| {{Flag\|France}} \| A chiton, a species of Leptochiton. \|
Leptochiton lateropustulosus \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton, a species of Leptochiton. \|
Leptochiton parvus \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton, a species of Leptochiton. \|
Leptochiton renauleauensis \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton, a species of Leptochiton. \|
Leptochiton terryiverseni \| Sp. nov \| Valid \| Hybertsen & Kiel \| Middle Eocene \| Humptulips Formation \| {{Flag\|United States}} ({{Flag\|Washington}}) \| A chiton, a species of Leptochiton. \|
Lepidopleurus gallicus \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton, a species of Lepidopleurus. \|
Lepidopleurus pseudobenoisti \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton, a species of Lepidopleurus. \|
Lucilina saubadeae \| Sp. nov \| Valid \| Dell'Angelo et al. \| \| \| {{Flag\|France}} \| A chiton, a species of Lucilina. \|
Lucinoma saetheri \| Sp. nov \| Valid \| Amano, Little & Campbell \| Miocene \| Bexhaven Limestone Ihungia Limestone \| {{Flag\|New Zealand}} \| A bivalve belonging to the family Lucinidae. \|
Mactra (Sarmatymactra) belokrysia{{cite book \|author1=A.A. Berezovsky \|author2=M. Systerova \|year=2018 \|chapter=ОБ ОДНОМ ВИДЕ Mactra (Bivalvia) ИЗ СРЕДНЕГО САРМАТА (МИОЦЕН) КРИВБАССА \|title=Міжнародна науково-технічна конференція "Розвиток промисловості та суспільства". Секція 5. Геологія і прикладна мінералогія. 23-25 травня 2018 р. Матеріали конференції \|pages=58–67 \|chapter-url=https://www.researchgate.net/publication/329104117 }} \| Sp. nov \| Valid \| Berezovsky in Berezovsky & Systerova \| Miocene \| \| {{Flag\|Ukraine}} \| A bivalve, a species of Mactra. \|
Meekopecten{{cite book \|author=John Bruce Waterhouse \|year=2018 \|title=Late Carboniferous and Early Permian Brachiopoda and Mollusca from the lower Jungle Creek and upper Ettrain Formations of the Yukon Territory, Canada \|series=Earthwise \|volume=15 \|pages=1–514 \|url=https://gsnz.org.nz/assets/Uploads/Shop/Products/Earthwise/Earthwise-15-Brachiopods-and-mollusc-from-Yukon.pdf }} \| Gen. et comb. nov \| Valid \| Waterhouse \| Carboniferous \| Stanton Formation \| {{Flag\|Canada}} ({{Flag\|Yukon}}) {{Flag\|United States}} ({{Flag\|Kansas}}) \| A bivalve belonging to the group Pectinida. The type species is "Acanthopecten" meeki Newel (1938).
Meganodontia haunuiensis \| Sp. nov \| Valid \| Amano, Little & Campbell \| Miocene \| Ihungia Limestone \| {{Flag\|New Zealand}} \| A bivalve belonging to the family Lucinidae. \|
Megaxinus stironensis{{Cite journal\|author1=Steffen Kiel \|author2=Marco Taviani \|year=2018 \|title=Chemosymbiotic bivalves from the late Pliocene Stirone River hydrocarbon seep complex in northern Italy \|journal=Acta Palaeontologica Polonica \|volume=63 \|issue=3 \|pages=557–568 \|doi=10.4202/app.00473.2018 \|doi-access=free }} \| Sp. nov \| Valid \| Kiel & Taviani \| Pliocene \| Lugagnano Formation \| {{Flag\|Italy}} \| A bivalve belonging to the family Lucinidae. \|
Modiolus mortenseni \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Modiolus. \|
Moirechlamys \| Gen. et comb. nov \| Valid \| Santelli & del Río \| Late Miocene–early Pliocene \| \| {{flag\|Argentina}} \| A scallop. The type species is "Pecten" actinodes Sowerby (1846); genus also includes "Chlamys" aurorae Feruglio (1954). \|
Monodacna pseudocolorata \| Sp. nov \| Valid \| Büyükmeriç & Wesselingh \| Late Pleistocene \| \| {{Flag\|Turkey}} \| A cockle. \|
Mulinoides plenicostatus \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A bivalve belonging to the family Mactridae. \|
Neuquemya{{Cite journal\|author=Susana E. Damborenea \|year=2018 \|title=New bivalve genus from the Early Jurassic of Neuquén Basin, Argentina, and its bearing on the Cuspidariidae (Poromyida) fossil record \|journal=Journal of Paleontology \|volume=93 \|issue=1 \|pages=25–36 \|doi=10.1017/jpa.2018.57 \|s2cid=134651984 }} \| Gen. et sp. nov \| Valid \| Damborenea \| Early Jurassic (Pliensbachian) \| \| {{Flag\|Argentina}} \| A bivalve, possibly belonging to the family Cuspidariidae. Genus includes new species N. leanzaorum. \|
Nuculana acutilineata \| Sp. nov \| Valid \| Hybertsen & Kiel \| Middle Eocene \| Humptulips Formation \| {{Flag\|United States}} ({{Flag\|Washington}}) \| A bivalve. \|
Oryxia{{Cite journal\|author1=Valentin Rineau \|author2=Loïc Villier \|year=2018 \|title=Taxonomic revision of the genus Ichthyosarcolites Demarest, 1812, and description of a new canaliculate rudist from the Cenomanian of Slovenia: Oryxia sulcata gen. et sp. nov. (Bivalvia, Hippuritida) \|journal=Cretaceous Research \|volume=90 \|pages=60–79 \|doi=10.1016/j.cretres.2018.04.001 \|bibcode=2018CrRes..90...60R \|s2cid=135180019 \|url=https://hal.sorbonne-universite.fr/hal-01789689/file/R%C3%A9vision%20Ichthyosarcolites2.pdf }} \| Gen. et sp. nov \| Valid \| Rineau & Villier \| Late Cretaceous (Cenomanian) \| \| {{Flag\|Slovenia}} \| A rudist bivalve. Genus includes new species O. sulcata. \|
Parachiton palmorum \| Sp. nov \| Valid \| Dell'Angelo et al. \| \| \| {{Flag\|France}} \| A chiton, a species of Parachiton. \|
Permianaia{{Cite journal\|author1=V. V. Silantiev \|author2=M. N. Urazaeva \|author3=V. K. Golubev \|year=2018 \|title=The nonmarine bivalve Permianaia gen. nov., the last member of Naiaditidae from the terminal Permian the East European Platform \|journal=Paleontological Journal \|volume=52 \|issue=7 \|pages=777–790 \|doi=10.1134/S0031030118070109 \|bibcode=2018PalJ...52..777S \|s2cid=92608191 }} \| Gen. et sp. nov \| Valid \| Silantiev, Urazaeva & Golubev \| Late Permian \| \| {{Flag\|Russia}} ({{Flag\|Vladimir Oblast}}) \| A bivalve belonging to the family Naiaditidae. Genus includes new species P. gusevi. \|
Phygraea badgeri \| Sp. nov \| Valid \| Squires \| Late middle Eocene to early late Eocene \| Coldwater Formation Lower Gaviota Formation \| {{Flag\|United States}} ({{Flag\|California}}) \| A foam oyster. \|
Pixiechlamys \| Gen. et comb. nov \| Valid \| Santelli & del Río \| Early Miocene \| \| {{flag\|Argentina}} \| A scallop. The type species is "Pecten" quemadensis Ihering (1897). \|
Pleuriocardia (Incacardium) schneideri \| Sp. nov \| Valid \| DeVries \| Early Paleogene \| Pisco Basin (Caballas Formation) \| {{Flag\|Peru}} \| A cockle. \|
Poromya katsuhiraensis \| Sp. nov \| Valid \| Amano & Jenkins in Amano, Jenkins & Kurita \| Paleocene \| Katsuhira Formation \| {{Flag\|Japan}} \| A bivalve. \|
Pteria thomseni \| Sp. nov \| Valid \| Schnetler & Nielsen \| Paleocene (Selandian) \| \| {{Flag\|Denmark}} \| A species of Pteria. \|
Pulvinites elenae{{Cite journal\|author=John W. M. Jagt \|year=2018 \|title=Latest Cretaceous Pulvinites (Bivalvia, Pterioidea, Pulvinitidae), new to the Maastrichtian type area, The Netherlands \|journal=Basteria. Journal of the Netherlands Malacological Society \|volume=82 \|issue=4–6 \|pages=103–109 }} \| Sp. nov \| Valid \| Jagt \| Late Cretaceous (Maastrichtian) \| \| {{Flag\|Netherlands}} \| A bivalve belonging to the family Pulvinitidae. \|
Pycnogryphaea{{Cite journal\|author=Igor N. Kosenko \|year=2018 \|title=The origin of the Pycnodonteinae and relationship between gryphaeas and true pycnodontes \|journal=Acta Palaeontologica Polonica \|volume=63 \|issue=4 \|pages=769–778 \|doi=10.4202/app.00494.2018 \|doi-access=free }} \| Gen. et comb. nov \| Valid \| Kosenko \| Early Cretaceous (Berriasian) \| \| Crimean Peninsula \| A bivalve belonging to the family Gryphaeidae and the subfamily Pycnodonteinae. The type species is "Gryphaea" weberae Yanin in Tschelzova (1969). \|
Rhyssoplax assurrectum \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton, a species of Rhyssoplax. \|
Schizochiton tasteti \| Sp. nov \| Valid \| Dell'Angelo et al. \| \| \| {{Flag\|France}} \| A chiton, a species of Schizochiton. \|
Terzileria \| Gen. et sp. nov \| Valid \| Kiel \| Late Triassic (late Carnian, possibly also Norian) \| \| {{Flag\|Turkey}} {{Flag\|United States}}? \| A bivalve belonging to the group Carditida and the family Kalenteridae. The type species is T. gregaria. \|
Thyasira (Thyasira) oliveri \| Sp. nov \| Valid \| Amano & Jenkins in Amano, Jenkins & Kurita \| Paleocene \| Katsuhira Formation \| {{Flag\|Japan}} \| A species of Thyasira. \|
Tonicella redoniensis \| Sp. nov \| Valid \| Dell'Angelo et al. \| Miocene (Tortonian) \| \| {{Flag\|France}} \| A chiton, a species of Tonicella. \|

References

Category:Molluscs described in 2018

Category:2018 in paleontology

Category:Paleomalacology