2019 in paleomalacology

• Description of an assemblage of conchiferan mollusks from the Cambrian Shackleton Limestone (Antarctica) is published by Claybourn et al. (2019).{{cite journal |author1=Thomas M. Claybourn |author2=Sarah M. Jacquet |author3=Christian B. Skovsted |author4=Timothy P. Topper |author5=Lars E. Holmer |author6=Glenn A. Brock |year=2019 |title=Mollusks from the upper Shackleton Limestone (Cambrian Series 2), Central Transantarctic Mountains, East Antarctica |journal=Journal of Paleontology |volume=93 |issue=3 |pages=437–459 |doi=10.1017/jpa.2018.84 |bibcode=2019JPal...93..437C |s2cid=134747228 |doi-access=free }}
• A study on Early Triassic recovery of ammonites and gastropods after the Permian–Triassic extinction event is published by Pietsch et al. (2019).{{cite journal |author1=Carlie Pietsch |author2=Kathleen A. Ritterbush |author3=Jeffrey R. Thompson |author4=Elizabeth Petsios |author5=David J. Bottjer |year=2019 |title=Evolutionary models in the Early Triassic marine realm |journal=Palaeogeography, Palaeoclimatology, Palaeoecology |volume=513 |pages=65–85 |doi=10.1016/j.palaeo.2017.12.016 |bibcode=2019PPP...513...65P |s2cid=134281291 }}
• A study on the impact of the Cenomanian-Turonian boundary event and other Cretaceous oceanic anoxic events on generic- and species-level molluscan diversity, extinction rates and ecological turnover is published by Freymueller, Moore & Myers (2019).{{cite journal |author1=Nicholas A. Freymueller |author2=Jason R. Moore |author3=Corinne E. Myers |year=2019 |title=An analysis of the impacts of Cretaceous oceanic anoxic events on global molluscan diversity dynamics |journal=Paleobiology |volume=45 |issue=2 |pages=280–295 |doi=10.1017/pab.2019.10 |bibcode=2019Pbio...45..280F |s2cid=145885183 }}
• A juvenile ammonite specimen assigned to the genus Puzosia and four marine gastropods are reported from the Cretaceous Burmese amber of Myanmar by Yu et al. (2019).{{Cite journal|author1=Tingting Yu |author2=Richard Kelly |author3=Lin Mu |author4=Andrew Ross |author5=Jim Kennedy |author6=Pierre Broly |author7=Fangyuan Xia |author8=Haichun Zhang |author9=Bo Wang |author10=David Dilcher |year=2019 |title=An ammonite trapped in Burmese amber |journal=Proceedings of the National Academy of Sciences of the United States of America |volume=116 |issue=23 |pages=11345–11350 |doi=10.1073/pnas.1821292116 |pmid=31085633 |pmc=6561253 |bibcode=2019PNAS..11611345Y |doi-access=free }}
• A study on the timing and nature of recovery of benthic marine ecosystems of Antarctica after the Cretaceous–Paleogene extinction event, as indicated by data from fossils of benthic molluscs, is published by Whittle et al. (2019).{{Cite journal|author1=Rowan J. Whittle |author2=James D. Witts |author3=Vanessa C. Bowman |author4=J. Alistair Crame |author5=Jane E. Francis |author6=Jon Ineson |year=2019 |title=Nature and timing of biotic recovery in Antarctic benthic marine ecosystems following the Cretaceous–Palaeogene mass extinction |journal=Palaeontology |volume=62 |issue= 6|pages= 919–934|doi=10.1111/pala.12434 |bibcode=2019Palgy..62..919W |doi-access=free |hdl=1983/664225b7-7261-41b0-b453-7b6a5c860e8a |hdl-access=free }}

File:Puzosia Bhimaites species Burmese amber PNAS Fig2 A.jpg]]

• Dimorphic Indonesian ammonite Macrocephalites keeuwensis is reported from the core of Jara Dome (Kutch district, India) by Jain (2019).{{Cite journal |author=Sreepat Jain |year=2019 |title=On the occurrence of the Indonesian ammonite Macrocephalites keeuwensis Boehm [M & m] from Kachchh (Western India) |journal=Zitteliana |volume=93 |pages=3–24 |url=https://bspg.palmuc.org/images/pdfs/Zitteliana/1_Jain_93.pdf |access-date=2019-02-03 |archive-date=2020-07-22 |archive-url=https://web.archive.org/web/20200722193354/https://bspg.palmuc.org/images/pdfs/Zitteliana/1_Jain_93.pdf |url-status=dead }}
• Description of new fossils of members of the genus Lytohoplites from the Neuquén Basin (Argentina), taxonomic revision of the Lytohoplites species occurring in this basin, and a study on the ontogeny, probable sexual dimorphism and spectrum of intraspecific variability of members of this genus, is published by Vennari & Aguirre-Urreta (2019).{{Cite journal |author1=Verónica V. Vennari |author2=Beatriz Aguirre-Urreta |year=2019 |title=Intraspecific variability, biostratigraphy and paleobiological significance of the Southern Gondwana ammonoid genus Lytohoplites Spath |journal=Journal of Paleontology |volume=93 |issue=4 |pages=702–726 |doi=10.1017/jpa.2019.1 |bibcode=2019JPal...93..702V |s2cid=135383215 }}
• A study on the intraspecific variation through the ontogeny of the Late Cretaceous ammonite Scaphites whitfieldi from the Western Interior of the United States is published by Klein & Landman (2019).{{Cite journal|author1=Carina Klein |author2=Neil H. Landman |year=2019 |title=Intraspecific variation through ontogeny in late Cretaceous ammonites |journal=American Museum Novitates |issue=3922 |pages=1–25 |doi=10.1206/3922.1 |hdl=2246/6929 |s2cid=84180242 |url=https://www.biodiversitylibrary.org/item/266389 }}
• A lower jaw of Spathites puercoensis is described from the Turonian Carlile Member of the Mancos Shale (New Mexico, United States) by Landman et al. (2019).{{Cite journal |author1=Neil H. Landman |author2=Paul L. Sealey |author3=Michael P. Foley |author4=Spencer G. Lucas |year=2019 |title=Lower jaw of Spathites (Ammonoidea, Acanthoceratoidea) from the Upper Cretaceous (Turonian) of New Mexico |journal=American Museum Novitates |issue=3925 |pages=1–12 |doi=10.1206/3925.1 |hdl=2246/6935 |s2cid=149940913 |url=https://www.biodiversitylibrary.org/item/266163 }}
• A study on periodic variations in carbon and oxygen stable isotope profiles from Campanian and Maastrichtian ammonites belonging to the genus Baculites, and on their implications for inferring the life histories of these ammonites, is published by Ellis & Tobin (2019).{{Cite journal|author1=Nicholas M. Ellis |author2=Thomas S. Tobin |year=2019 |title=Evidence for seasonal variation in δ¹³C and δ¹⁸O profiles of Baculites and implications for growth rate |journal=Palaeontology |volume=62 |issue=4 |pages=583–598 |doi=10.1111/pala.12416 |bibcode=2019Palgy..62..583E |s2cid=135358829 }}
• A study on the hydrostatic properties of the orthoconic morphotype of Baculites compressus and on their implications for the knowledge of the mode of life of this animal is published by Peterman et al. (2019).{{Cite journal|author1=David J. Peterman |author2=Charles N. Ciampaglio |author3=Ryan C. Shell |author4=Margaret M. Yacobucci |year=2019 |title=Mode of life and hydrostatic stability of orthoconic ectocochleate cephalopods: Hydrodynamic analyses of restoring moments from 3D printed, neutrally buoyant models |journal=Acta Palaeontologica Polonica |volume=64 |issue=3 |pages=441–460 |doi=10.4202/app.00595.2019 |doi-access=free }}
• A study on the ecology and growth of baculitid and scaphitid ammonites from the Maastrichtian Owl Creek Formation (Mississippi, United States), evaluating whether these taxa may have migrated, is published by Ferguson et al. (2019).{{Cite journal|author1=Katherine Ferguson |author2=Kenneth G. Macleod |author3=Neil H. Landman |author4=Jocelyn A. Sessa |year=2019 |title=Evaluating growth and ecology in baculitid and scaphitid ammonites using stable isotope sclerochronology |journal=PALAIOS |volume=34 |issue=6 |pages=317–329 |doi=10.2110/palo.2019.005 |bibcode=2019Palai..34..317F |s2cid=198419424 }}
• A study on a sutural anomaly of ammonite specimens known as sutural pseudoinversion is published by Rogov (2019).{{Cite journal|author=Mikhail A. Rogov |year=2019 |title=Pseudoinversion of septal sutures in Middle Jurassic–Lower Cretaceous non-heteromorph ammonites |journal=Swiss Journal of Palaeontology |volume=138 |issue=1 |pages=163–176 |doi=10.1007/s13358-019-00193-5 |s2cid=134763684 |doi-access=free |bibcode=2019SwJP..138..163R }}
• A study on the systematics of Late Cretaceous ammonites from the southeastern San Juan Basin (Sandoval County, New Mexico) and on the stratigraphic framework of their fossils is published by Sealey & Lucas (2019).{{Cite journal|author1=Paul L. Sealey |author2=Spencer G. Lucas |year=2019 |title=Late Cretaceous (Cenomanian-Campanian) ammonite systematic paleontology and biostratigraphy, southeastern San Juan Basin, Sandoval County, New Mexico |journal=New Mexico Museum of Natural History and Science Bulletin |volume=80 |pages=1–245 |url=https://econtent.unm.edu/digital/collection/bulletins/id/7315 }}
• A study on the ontogenetic trajectories of septal spacing between succeeding chambers in Hypophylloceras subramosum and Phyllopachyceras ezoense is published online by Iwasaki, Iwasaki & Wani (2019).{{Cite journal|author1=Tetsuro Iwasaki |author2=Yui Iwasaki |author3=Ryoji Wani |year=2019 |title=Polymorphism in Late Cretaceous phylloceratid ammonoids: evidence from ontogenetic trajectories of septal spacing |journal=Papers in Palaeontology |volume=6 |pages= 155–172|doi=10.1002/spp2.1266 |s2cid=202021479 |doi-access=free }}
• A study on the intra- and interspecific variation and ontogenetic trajectories of the kossmaticeratid species Maorites densicostatus and Maorites seymourianus is published by Morón-Alfonso (2019).{{Cite journal|author=Daniel A. Morón-Alfonso |year=2019 |title=Exploring the paleobiology of ammonoids (Cretaceous, Antarctica) using non-invasive imaging methods |journal=Palaeontologia Electronica |volume=22 |issue=3 |pages=Article number 22.3.57 |doi=10.26879/1007 |doi-access=free }}
• A pathological ammonite specimen characterized by a pronounced left-right asymmetry in both ornamentation and suture lines is described from the Toarcian of southern France by Jattiot et al. (2019).{{Cite journal|author1=Romain Jattiot |author2=Emmanuel Fara |author3=Arnaud Brayard |author4=Séverine Urdy |author5=Nicolas Goudemand |year=2019 |title=Learning from beautiful monsters: phylogenetic and morphogenetic implications of left-right asymmetry in ammonoid shells |journal=BMC Evolutionary Biology |volume=19 |issue=1 |pages=Article number 210 |doi=10.1186/s12862-019-1538-5 |pmid=31722660 |pmc=6854895 |doi-access=free |bibcode=2019BMCEE..19..210J }}
• A study on the morphology and function of hook-like structures found in the body chambers of six specimens of Rhaeboceras halli is published online by Kruta et al. (2019).{{cite journal |author1=Isabelle Kruta |author2=Jérémie Bardin |author3=Christopher P. A. Smith |author4=Paul Tafforeau |author5=Neil H. Landman |year=2019 |title=Enigmatic hook-like structures in Cretaceous ammonites (Scaphitidae) |journal=Palaeontology |volume=63 |issue=2 |pages=301–312 |doi=10.1111/pala.12457 |s2cid=214305133 |url=https://hal.sorbonne-universite.fr/hal-02962300/file/Kruta%20et%20al_r2019_HAL.pdf }}

• A study on hydrostatic properties of early Paleozoic nautiloid and endoceratoid cephalopods, and on its implications for the knowledge of ecology of these cephalopods, is published by Peterman, Barton & Yacobucci (2019).{{cite journal |author1=David J. Peterman |author2=Christopher C. Barton |author3=Margaret M. Yacobucci |year=2019 |title=The hydrostatics of Paleozoic ectocochleate cephalopods (Nautiloidea and Endoceratoidea) with implications for modes of life and early colonization of the pelagic zone |journal=Palaeontologia Electronica |volume=22 |issue=2 |pages=Article number 22.2.24 |doi=10.26879/884 |doi-access=free }}
• A study on the distribution and diversity of cephalopods during the Cambrian–Ordovician transition is published by Fang et al. (2019).{{cite journal |author1=Xiang Fang |author2=Björn Kröger |author3=Yuan-Dong Zhang |author4=Yun-Bai Zhang |author5=Ting-En Chen |year=2019 |title=Palaeogeographic distribution and diversity of cephalopods during the Cambrian–Ordovician transition |journal=Palaeoworld |volume=28 |issue=1–2 |pages=51–57 |doi=10.1016/j.palwor.2018.08.007 |hdl=10138/308817 |doi-access=free }}
• A study on cephalopod occurrences in South China and adjacent areas during the Middle to Late Ordovician, aiming to define biogeographic provinces, is published by Fang et al. (2019).{{Cite journal|author1=Xiang Fang |author2=Clive Burrett |author3=Wenjie Li |author4=Yunbai Zhang |author5=Yuandong Zhang |author6=Tingen Chen |author7=Xuejin Wu |year=2019 |title=Dynamic variation of Middle to Late Ordovician cephalopod provincialism in the northeastern peri-Gondwana region and its implications |journal=Palaeogeography, Palaeoclimatology, Palaeoecology |volume=521 |pages=127–137 |doi=10.1016/j.palaeo.2019.02.015 |bibcode=2019PPP...521..127F |s2cid=134139469 }}
• A study on changes of geographic range size and rates of speciation and extinction in nautiloid and ammonoid cephalopods living in the North American Midcontinent Sea from the Carboniferous (Pennsylvanian)-early Permian is published by Kolis & Lieberman (2019).{{Cite journal|author1=Kayla M. Kolis |author2=Bruce S. Lieberman |year=2019 |title=Using GIS to examine biogeographic and macroevolutionary patterns in some late Paleozoic cephalopods from the North American Midcontinent Sea |journal=PeerJ |volume=7 |pages=e6910 |doi=10.7717/peerj.6910 |pmid=31139505 |pmc=6521810 |doi-access=free }}
• Ascocerid fossils are described from the Hirnantian?–Llandovery strata of the Eusebio Ayala and Vargas Peña formations (southeastern Paraguay) by Cichowolski et al. (2019), representing the first ascocerid record from high paleolatitudes of Gondwana.{{cite journal |author1=M. Cichowolski |author2=N.J. Uriz |author3=M.B. Alfaro |author4=J.C. Galeano Inchausti |year=2019 |title=Ascocerid cephalopods from the Hirnantian?–Llandovery stages of the southern Paraná Basin (Paraguay, South America): first record from high paleolatitudes |journal=Journal of Paleontology |volume=93 |issue=1 |pages=37–47 |doi=10.1017/jpa.2018.59 |bibcode=2019JPal...93...37C |hdl=11336/124601 |s2cid=134836401 |url=http://sedici.unlp.edu.ar/handle/10915/125863 |hdl-access=free }}
• A juvenile specimen of Dolorthoceras, representing the first Devonian cephalopod specimen preserving nacreous structures and the first ectocochleate cephalopod preserving fibrous structures within its conch, is described from the Frasnian Domanic Formation (Russia) by Doguzhaeva (2019).{{cite journal |author=Larisa A. Doguzhaeva |year=2019 |title=Siphonal tube structure of the Late Devonian orthocerid Dolorthoceras from the Polar Urals (NW Russia) preserving nacre and organic fibres as well as its persistence in cephalopod evolution |journal=Swiss Journal of Palaeontology |volume=138 |issue=1 |pages=37–47 |doi=10.1007/s13358-019-00188-2 |s2cid=134845266 |doi-access=free |bibcode=2019SwJP..138...37D }}
• A study on the response of cephalopod assemblages from the area of the present-day European Russia to environmental changes during the early Aptian Oceanic Anoxic Event is published by Rogov et al. (2019).{{cite journal |author1=Mikhail A. Rogov |author2=Elena V. Shchepetova |author3=Alexei P. Ippolitov |author4=Vladimir B. Seltser |author5=Aleksandr A. Mironenko |author6=Boris G. Pokrovsky |author7=Bhawanisingh G. Desai |year=2019 |title=Response of cephalopod communities on abrupt environmental changes during the early Aptian OAE1a in the Middle Russian Sea |journal=Cretaceous Research |volume=96 |pages=227–240 |doi=10.1016/j.cretres.2019.01.007 |bibcode=2019CrRes..96..227R |s2cid=135280731 }}
• A study on the paleobiology of cephalopods from the Albian Mahajanga Basin of Madagascar will be published by Hoffmann et al. (2019).{{cite journal |author1=René Hoffmann |author2=Sylvia Riechelmann |author3=Kathleen A. Ritterbush |author4=Jennifer Koelen |author5=Nathalie Lübke |author6=Michael M. Joachimski |author7=Jens Lehmann |author8=Adrian Immenhauser |year=2019 |title=A novel multiproxy approach to reconstruct the paleoecology of extinct cephalopods |journal=Gondwana Research |volume=67 |pages=64–81 |doi=10.1016/j.gr.2018.10.011 |bibcode=2019GondR..67...64H |s2cid=135283377 }}
• A proposal for revision of the classification of nautiloid cephalopods presented in Treatise Part K is presented by King & Evans (2019), who name a new subclass Tarphyceratia, new order Rioceratida and new family Bactroceratidae.{{cite journal |author1=Andy H. King |author2=David H. Evans |year=2019 |title=High-level classification of the nautiloid cephalopods: a proposal for the revision of the Treatise Part K |journal=Swiss Journal of Palaeontology |volume=138 |issue=1 |pages=65–85 |doi=10.1007/s13358-019-00186-4 |s2cid=133647555 |doi-access=free |bibcode=2019SwJP..138...65K }}
• A study on embryonic and early juvenile development of shell in Peismoceras is published by Manda & Turek (2019).{{cite journal |author1=Štěpán Manda |author2=Vojtěch Turek |year=2019 |title=Embryonic and early juvenile development in the Silurian basal nautilid Peismoceras Hyatt, 1894 |journal=Swiss Journal of Palaeontology |volume=138 |issue=1 |pages=123–139 |doi=10.1007/s13358-019-00192-6 |s2cid=182657954 |doi-access=free |bibcode=2019SwJP..138..123M }}
• A study on changes of the morphological diversity of Late Permian coiled nautiloids is published online by Korn et al. (2019).{{cite journal |author1=Dieter Korn |author2=Abbas Ghaderi |author3=Nahideh Ghanizadeh Tabrizi |author4=Jana Gliwa |year=2019 |title=The morphospace of Late Permian coiled nautiloids |journal=Lethaia |volume=53 |issue=2 |pages=154–165 |doi=10.1111/let.12348 |s2cid=202180189 }}
• A study on the paleobiology of Angulithes mermeti, based on new material from the upper Cenomanian of Egypt, and on its implications for the knowledge of the evolution of Cenomanian lineage of Angulithes, is published by Wilmsen & Nagm (2019).{{cite journal |author1=Markus Wilmsen |author2=Emad Nagm |year=2019 |title=Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid |journal=Acta Palaeontologica Polonica |volume=64 |issue=4 |pages=831–894 |doi=10.4202/app.00637.2019 |doi-access=free }}
• A study on the anatomy of Gordoniconus beargulchensis and on its implications for the knowledge of evolution of coleoids is published by Klug et al. (2019).{{cite journal |author1=Christian Klug | author2=Neil H. Landman | author3=Dirk Fuchs | author4=Royal H. Mapes |author5=Alexander Pohle |author6=Pierre Guériau |author7=Solenn Reguer |author8=René Hoffmann |year=2019 |title=Anatomy and evolution of the first Coleoidea in the Carboniferous |journal=Communications Biology |volume=2 |pages=Article number 280 |doi=10.1038/s42003-019-0523-2 |pmid=31372519 |pmc=6668408 }}
• A study on a putative Sinemurian octocoral Mesosceptron from Montagna del Casale (Sicily, Italy) is published by Pignatti et al. (2019), who reinterpret the fossils of this taxon as incompletely preserved coleoid rostra, and consider Mesosceptron to be a subjective junior synonym of the genus Atractites.{{Cite journal|author1=J. Pignatti |author2=N. Mariotti |author3=C. D'Arpa |author4=C. Sorbini |year=2019 |title=Mesosceptron Fucini, 1915 from the Sinemurian of Sicily: an aulacoceratid cephalopod and not an octocoral |journal=Bollettino della Società Paleontologica Italiana |volume=58 |issue=2 |pages=155–163 }}
• A study on four specimens of Clarkeiteuthis conocauda from the Toarcian Posidonia Shale (Germany) preserved with small bony fish in their arm crowns, on the feeding behaviour of members of this species, and on the differences in the mode of life of C. conocauda, Passaloteuthis bisulcata and Hibolithes semisulcatus, is published by Jenny et al. (2019).{{cite journal |author1=Dominique Jenny |author2=Dirk Fuchs |author3=Alexander I. Arkhipkin |author4=Rolf B. Hauff |author5=Barbara Fritschi |author6=Christian Klug |year=2019 |title=Predatory behaviour and taphonomy of a Jurassic belemnoid coleoid (Diplobelida, Cephalopoda) |journal=Scientific Reports |volume=9 |issue=1 |pages=Article number 7944 |doi=10.1038/s41598-019-44260-w |pmid=31138838 |pmc=6538661 |bibcode=2019NatSR...9.7944J }}
• A study on belemnite body-size dynamics across the Pliensbachian–Toarcian boundary in the Peniche section (Lusitanian Basin, Portugal), evaluating its implications for the knowledge of the impact of the Pliensbachian–Toarcian boundary warming event on belemnite body size, is published by Rita et al. (2019).{{Cite journal|author1=Patrícia Rita |author2=Paulina Nätscher |author3=Luís V. Duarte |author4=Robert Weis |author5=Kenneth De Baets |year=2019 |title=Mechanisms and drivers of belemnite body-size dynamics across the Pliensbachian–Toarcian crisis |journal=Royal Society Open Science |volume=6 |issue=12 |pages=Article ID 190494 |doi=10.1098/rsos.190494 |pmid=31903197 |pmc=6936285 |bibcode=2019RSOS....690494R }}
• New belemnite fossils are described from the Berriasian–Hauterivian of Arctic Canada and North-East Greenland by Mutterlose et al. (2019), who also evaluate the implications of these fossils for the knowledge of spatial distribution patterns of belemnites at northern high latitudes.{{cite journal |author1=Jörg Mutterlose |author2=Peter Alsen |author3=Yasuhiro Iba |author4=Simon Schneider |year=2019 |title=Palaeobiogeography and palaeoecology of Early Cretaceous belemnites from the northern high latitudes |journal=Proceedings of the Geologists' Association |volume=131 |issue=3–4 |pages=278–286 |doi=10.1016/j.pgeola.2019.06.001 |s2cid=197575876 }}

• A study on the diversity of gastropod larval conch fossil assemblages of ages ranging from the Ordovician to Carboniferous is published online by Dzik (2019).{{Cite journal|author=Jerzy Dzik |year=2019 |title=Decline in diversity of early Palaeozoic loosely coiled gastropod protoconchs |journal=Lethaia |volume=53 |issue=1 |pages=32–46 |doi=10.1111/let.12334 |s2cid=165122563 }}
• A study on the recovery of gastropods in the aftermath of the Cretaceous–Paleogene extinction event, based on data from fossils from the former Ankerpoort-Curfs quarry (Geulhem, the Netherlands), is published online by Vellekoop et al. (2019).{{cite journal |author1=Johan Vellekoop |author2=Kris H. Van Tilborgh |author3=Paul Van Knippenberg |author4=John W. M. Jagt |author5=Peter Stassen |author6=Stijn Goolaerts |author7=Robert P. Speijer |year=2019 |title=Type-Maastrichtian gastropod faunas show rapid ecosystem recovery following the Cretaceous–Palaeogene boundary catastrophe |journal=Palaeontology |volume=63 |issue=2 |pages=349–367 |doi=10.1111/pala.12462 |s2cid=214166942 |url=https://lirias.kuleuven.be/bitstream/123456789/646150/2/Vellekoop%20et%20al%20%5bCurfs%20MS%5d%20v14012019.docx }}
• A probable cyclophoroidean gastropod, possibly a member of the family Cyclophoridae, is described from the Cretaceous amber from Myanmar by Xing et al. (2019), constituting the first confirmed and oldest record of soft-bodied preservation of a snail in Cretaceous amber.{{Cite journal|author1=Lida Xing |author2=Andrew J. Ross |author3=Jeffrey D. Stilwell |author4=Jun Fang |author5=Ryan C. McKellar |year=2019 |title=Juvenile snail with preserved soft tissue in mid-Cretaceous amber from Myanmar suggests a cyclophoroidean (Gastropoda) ancestry |journal=Cretaceous Research |volume=93 |pages=114–119 |doi=10.1016/j.cretres.2018.09.013 |bibcode=2019CrRes..93..114X |s2cid=133782607 |url=https://research.monash.edu/en/publications/89d85258-16f4-42aa-8ee7-2f7cd76d92ef }}
• A study on the nature of the size dimorphism in the Miocene gastropod Persististrombus deperditus, and on the causes of its evolution, is published by Halder & Paira (2019).{{Cite journal|author1=Kalyan Halder |author2=Somnath Paira |year=2019 |title=First record of sexual size dimorphism in fossil Strombidae (Mollusca, Gastropoda) from the Miocene of Kutch, western India and its evolutionary implications |journal=Royal Society Open Science |volume=6 |issue=2 |pages=Article ID 181320 |doi=10.1098/rsos.181320 |pmid=30891267 |pmc=6408366 |bibcode=2019RSOS....681320H }}
• New specimens of Spinucella reimersi are described from the Miocene Gram Clay of Denmark by Schnetler (2019), who also provides an emended description of this species.{{Cite journal|author=Kai Ingemann Schnetler |year=2019 |title=On the occurrence of Spinucella reimersi (von Koenen 1872) (Gastropoda: Muricidae) in the Late Miocene Gram Clay of Denmark, and an emended description of the species |journal=Bulletin of the Geological Society of Denmark |volume=67 |pages=23–27 |url=https://2dgf.dk/xpdf/bull67-23-27.pdf }}
• A revision of extant and Neogene members of the genus Antistreptus from the southwestern Atlantic Ocean is published by Pastorino & Griffin (2019).{{Cite journal|author1=Guido Pastorino |author2=Miguel Griffin |year=2019 |title=Gastropods of the genus Antistreptus as examples of persistent molluscan lineages in the Neogene of the southwestern Atlantic |journal=Journal of Paleontology |volume=93 |issue= 5|pages= 916–924|doi=10.1017/jpa.2019.8 |bibcode=2019JPal...93..916P |hdl=11336/124726 |s2cid=134602572 }}