2018 in paleoichthyology

File:Phymolepis cuifengshanensis.PNG

• A study on the fossil fish occurrences and habitat during the middle Paleozoic (480 million to 360 million years ago) is published by Sallan et al. (2018), fish originated in restricted, shallow intertidal-subtidal environments.{{Cite journal|author1=Lauren Sallan |author2=Matt Friedman |author3=Robert S. Sansom |author4=Charlotte M. Bird |author5=Ivan J. Sansom |year=2018 |title=The nearshore cradle of early vertebrate diversification |journal=Science |volume=362 |issue=6413 |pages=460–464 |doi=10.1126/science.aar3689 |pmid=30361374 |bibcode=2018Sci...362..460S |s2cid=53089922 |url=https://www.research.manchester.ac.uk/portal/en/publications/the-nearshore-cradle-of-early-vertebrate-diversification(95cb0da4-3c6f-4be4-a0a9-6e866fb1fd5b).html|doi-access=free }}
• A survey of Devonian fish fauna from Michigan is published by Stack & Sallan (2018).{{Cite journal|author1=Jack Stack |author2=Lauren Sallan |year=2018 |title=An examination of the Devonian fishes of Michigan |journal=PeerJ |volume=6 |pages=e5636 |doi=10.7717/peerj.5636 |pmid=30258725 |pmc=6151260 |doi-access=free }}
• A study on the ecological diversification of thelodonts is published by Ferrón et al. (2018).{{Cite journal|author1=Humberto G. Ferrón |author2=Carlos Martínez-Pérez |author3=Susan Turner |author4=Esther Manzanares |author5=Héctor Botella |year=2018 |title=Patterns of ecological diversification in thelodonts |journal=Palaeontology |volume=61 |issue=2 |pages=303–315 |doi=10.1111/pala.12347 |bibcode=2018Palgy..61..303F |s2cid=134193011 |doi-access=free |hdl=10550/85568 |hdl-access=free }}
• The first occurrence of pelvic girdles and intromittent organs in Euphanerops longaevus, associated with a morphologically differentiated region of the axial skeleton, is reported by Chevrinais et al. (2018).{{Cite journal|author1=Marion Chevrinais |author2=Zerina Johanson |author3=Kate Trinajstic |author4=John Long |author5=Catherine Morel |author6=Claude B. Renaud |author7=Richard Cloutier |year=2018 |title=Evolution of vertebrate postcranial complexity: axial skeleton regionalization and paired appendages in a Devonian jawless fish |journal=Palaeontology |volume=61 |issue=6 |pages=949–961 |doi=10.1111/pala.12379 |bibcode=2018Palgy..61..949C |s2cid=135291962 }}
• A study on the identity of the aspidin (a primitive bone-like tissue of heterostracans) is published by Keating et al. (2018), who interpret aspidin as an acellular dermal bone.{{Cite journal|author1=Joseph N. Keating |author2=Chloe L. Marquart |author3=Federica Marone |author4=Philip C. J. Donoghue |year=2018 |title=The nature of aspidin and the evolutionary origin of bone |journal=Nature Ecology & Evolution |volume=2 |issue=9 |pages=1501–1506 |doi=10.1038/s41559-018-0624-1 |pmid=30065354 |pmc=6109381 |bibcode=2018NatEE...2.1501K }}
• Redescription of Tesseraspis mosaica is published by Blieck, Elliott & Karatajūtė-Talimaa (2018).{{cite journal |author1=Alain Blieck |author2=David K. Elliott |author3=Valentina N. Karatajūtė-Talimaa |year=2018 |title=A redescription of Tesseraspis mosaica Karatajūtė- Talimaa, 1983 (Vertebrata: †Pteraspidomorphi: Heterostraci) from the Lochkovian (Lower Devonian) of Severnaya Zemlya, Russia, with a review of tessellated heterostracan taxa |journal=Acta Geologica Polonica |volume=68 |issue=3 |pages=275–306 |doi=10.1515/agp-2018-0024 |url=https://geojournals.pgi.gov.pl/agp/article/view/26047 |doi-broken-date=1 November 2024 }}
• A study on the morphological and taxonomic diversity of pteraspidiforms is published by Romano, Sansom & Randle (2018).{{Cite journal|author1=Marco Romano |author2=Robert Sansom |author3=Emma Randle |year=2018 |title=Morphospace saturation in the stem-gnathostomes pteraspidiformes heterostracans: an early radiation of a 'bottom' heavy clade |journal=PeerJ |volume=6 |pages=e5249 |doi=10.7717/peerj.5249 |pmid=30042894 |pmc=6055588 |doi-access=free }}
• A study on the diversity of jaw shapes in modern and Paleozoic jawed fishes, evaluating whether the full extent of jaw morphological variation was established early in gnathostome evolutionary history, is published by Hill et al. (2018).{{Cite journal|author1=Jennifer J. Hill |author2=Mark N. Puttick |author3=Thomas L. Stubbs |author4=Emily J. Rayfield |author5=Philip C. J. Donoghue |year=2018 |title=Evolution of jaw disparity in fishes |journal=Palaeontology |volume=61 |issue=6 |pages=847–854 |doi=10.1111/pala.12371 |bibcode=2018Palgy..61..847H |doi-access=free |hdl=1983/2a8b1fc8-2aba-4c3e-b5be-eea579e3b662 |hdl-access=free }}
• New specimens of Brindabellaspis stensioi, providing new information on the morphology of the rostral region of the skull, are described from the Lower Devonian of the New South Wales (Australia) by King, Young & Long (2018).{{Cite journal|author1=Benedict King |author2=Gavin C. Young |author3=John A. Long |year=2018 |title=New information on Brindabellaspis stensioi Young, 1980, highlights morphological disparity in Early Devonian placoderms |journal=Royal Society Open Science |volume=5 |issue=6 |pages=180094 |doi=10.1098/rsos.180094 |pmid=30110452 |pmc=6030278 |bibcode=2018RSOS....580094K }}
• Redescription of the antiarch placoderm Asterolepis thule and a study on the age of the deposits preserving the fossils of this species is published by Newman & Den Blaauwen (2018).{{Cite journal|author1=Michael J. Newman |author2=Jan L. Den Blaauwen |year=2018 |title=A redescription of the endemic antiarch placoderm Asterolepis thule from the Middle Devonian (Givetian) of Shetland and its biostratigraphical horizon |journal=Scottish Journal of Geology |volume=54 |issue=2 |pages=69–75 |doi=10.1144/sjg2018-005 |bibcode=2018ScJG...54...69N |s2cid=134584732 }}
• Description of bony pelvic plates in 32 specimens of Bothriolepis canadensis from the Upper Devonian Escuminac Formation (Canada) is published by Charest, Johanson & Cloutier (2018), who reject the interpretation of these structures as genital plates (suggested by Long et al., 2015),{{Cite journal|author1=John A. Long |author2=Elga Mark-Kurik |author3=Zerina Johanson |author4=Michael S. Y. Lee |author5=Gavin C. Young |author6=Zhu Min |author7=Per E. Ahlberg |author8=Michael Newman |author9=Roger Jones |author10=Jan den Blaauwen |author11=Brian Choo |author12=Kate Trinajstic |year=2018 |title=Copulation in antiarch placoderms and the origin of gnathostome internal fertilization |journal=Nature |volume=517 |issue=7533 |pages=196–199 |doi=10.1038/nature13825 |pmid=25327249 |hdl=2328/35425 |s2cid=205240898 |hdl-access=free }} and identify them as the pelvic girdle instead.{{Cite journal|author1=France Charest |author2=Zerina Johanson |author3=Richard Cloutier |year=2018 |title=Loss in the making: absence of pelvic fins and presence of paedomorphic pelvic girdles in a Late Devonian antiarch placoderm (jawed stem-gnathostome) |journal=Biology Letters |volume=14 |issue=6 |pages=20180199 |doi=10.1098/rsbl.2018.0199 |pmid=29899132 |pmc=6030608 }}
• Redescription of the antiarch placoderm Phymolepis cuifengshanensis and a study on the phylogenetic relationships of this species is published by Wang & Zhu (2018).{{Cite journal|author1=Yajing Wang |author2=Min Zhu |year=2018 |title=Redescription of Phymolepis cuifengshanensis (Antiarcha: Yunnanolepididae) using high-resolution computed tomography and new insights into anatomical details of the endocranium in antiarchs |journal=PeerJ |volume=6 |pages=e4808 |doi=10.7717/peerj.4808 |pmid=29868260 |pmc=5978403 |doi-access=free }}
• A study on the morphology of the skull, especially the braincase of the petalichthyid placoderm Shearsbyaspis oepiki is published by Castiello & Brazeau (2018).{{Cite journal|author1=Marco Castiello |author2=Martin D. Brazeau |year=2018 |title=Neurocranial anatomy of the petalichthyid placoderm Shearsbyaspis oepiki Young revealed by X-ray computed microtomography |journal=Palaeontology |volume=61 |issue=3 |pages=369–389 |doi=10.1111/pala.12345 |pmid=29937580 |pmc=5993267 |bibcode=2018Palgy..61..369C }}
• Fossil interpreted as placoderm (arthrodiran) egg cases are described from the Devonian (Famennian) Cleveland Shale (Ohio, United States) by Carr & Jackson (2018).{{cite journal |author1=Robert K. Carr |author2=Gary Jackson |year=2018 |title=A preliminary note of egg-case oviparity in a Devonian placoderm fish |journal=Acta Geologica Polonica |volume=68 |issue=3 |pages=381–389 |doi=10.1515/agp-2018-0020 |url=https://geojournals.pgi.gov.pl/agp/article/view/26052 |doi-broken-date=1 November 2024 }}
• Circular or near-circular patterned trace fossils, similar to underwater circles produced by male pufferfishes, are described from the Upper Devonian Hongguleleng Formation (China) by Zong & Gong (2018), who consider it possible that these fossils may be structures made by male fish to attract females.{{Cite journal|author1=Ruiwen Zong |author2=Yiming Gong |year=2018 |title=Possible courtship behaviour of Devonian fish: Evidence from large radial trace fossils in northwestern China |journal=Palaeogeography, Palaeoclimatology, Palaeoecology |volume=505 |pages=180–186 |doi=10.1016/j.palaeo.2018.05.042 |bibcode=2018PPP...505..180Z |s2cid=135104929 }}
• Redescription of Gladbachus adentatus and a study on the phylogenetic relationships of the species is published by Coates et al. (2018).{{Cite journal|author1=Michael I. Coates |author2=John A. Finarelli |author3=Ivan J. Sansom |author4=Plamen S. Andreev |author5=Katharine E. Criswell |author6=Kristen Tietjen |author7=Mark L. Rivers |author8=Patrick J. La Riviere |year=2018 |title=An early chondrichthyan and the evolutionary assembly of a shark body plan |journal=Proceedings of the Royal Society B: Biological Sciences |volume=285 |issue=1870 |pages=20172418 |doi=10.1098/rspb.2017.2418 |pmid=29298937 |pmc=5784200 }}
• A study on the wear of a tooth whorl of a specimen of Edestus heinrichi, as well as on its implications for inferring the function of the tooth whorls in this species, is published by Itano (2018).{{Cite journal|author=Wayne M. Itano |year=2018 |title=A tooth whorl of Edestus heinrichi (Chondrichthyes, Eugeneodontiformes) displaying progressive macrowear |journal=Transactions of the Kansas Academy of Science |volume=121 |issue=1–2 |pages=125–133 |doi=10.1660/062.121.0214 |s2cid=90764139 }}
• New description of Edestus, providing new information on the anatomy of this taxon, is published online by Tapanila et al. (2018).{{Cite journal|author1=Leif Tapanila |author2=Jesse Pruitt |author3=Cheryl D. Wilga |author4=Alan Pradel |year=2018 |title=Saws, scissors and sharks: Late Paleozoic experimentation with symphyseal dentition |journal=The Anatomical Record |volume=303 |issue=2 |pages=363–376 |doi=10.1002/ar.24046 |pmid=30536888 |s2cid=54478736 |doi-access=free }}
• Two partial specimens of a callorhynchid chimaeroid left in open nomenclature are described from the Upper Kimmeridgian Nusplingen Plattenkalk (Germany) by Duffin (2018).{{Cite journal|author=Christopher J. Duffin |year=2018 |title=A callorhynchid chimaeroid (Pisces, Holocephali) from the Nusplingen Plattenkalk (Late Jurassic, SW Germany) |journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen |volume=289 |issue=2 |pages=161–175 |doi=10.1127/njgpa/2018/0756 |s2cid=134583173 }}
• A study on the teeth histology and vasculature of the oldest known tooth-bearing sharks, Leonodus carlsi and Celtiberina maderi, is published by Martinez-Perez et al. (2018).{{cite journal |author1=Carlos Martinez-Perez |author2=Alba Martin-Lazaro |author3=Humberto G. Ferron |author4=Martina Kirstein |author5=Philip C.J. Donoghue |author6=Hector Botella |year=2018 |title=Vascular structure of the earliest shark teeth |journal=Acta Geologica Polonica |volume=68 |issue=3 |pages=457–465 |doi=10.1515/agp-2018-0017 |url=https://geojournals.pgi.gov.pl/agp/article/view/26058 |doi-broken-date=1 November 2024 }}
• The first known basicranium of Carcharopsis wortheni is described from the Carboniferous Fayetteville Shale (United States) by Bronson, Mapes & Maisey (2018).{{Cite journal|author1=Allison W. Bronson |author2=Royal H. Mapes |author3=John G. Maisey |year=2018 |title=Chondrocranial morphology of Carcharopsis wortheni (Chondrichthyes, Euselachii incertae sedis) based on new material from the Fayetteville Shale (upper Mississippian, middle Chesterian) |journal=Papers in Palaeontology |volume=4 |issue=3 |pages=349–362 |doi=10.1002/spp2.1110 |bibcode=2018PPal....4..349B |s2cid=134975540 }}
• A study on the morphology of the braincase of Tristychius arcuatus is published by Coates & Tietjen (2018).{{Cite journal|author1=Michael I. Coates |author2=Kristen Tietjen |year=2018 |title=The neurocranium of the Lower Carboniferous shark Tristychius arcuatus (Agassiz, ¹⁸³⁷) |journal=Earth and Environmental Science Transactions of the Royal Society of Edinburgh |volume=108 |issue=1 |pages=19–35 |doi=10.1017/S1755691018000130 |s2cid=135297534 }}
• A diverse fauna of Early Triassic cartilaginous fishes is described from the Vikinghøgda Formation (Spitsbergen, Norway) by Bratvold, Delsett & Hurum (2018).{{Cite journal|author1=Janne Bratvold |author2=Lene Liebe Delsett |author3=Jørn H. Hurum |year=2018 |title=Chondrichthyans from the Grippia bonebed (Early Triassic) of Marmierfjellet, Spitsbergen |journal=Norwegian Journal of Geology |volume=98 |issue=2 |pages=189–217 |doi=10.17850/njg98-2-03 |url=http://njg.geologi.no/component/fabrik/details/1/2175-2175 |doi-access=free |hdl=10852/71103 |hdl-access=free }}
• The first material referable to hybodont shark (a member of the genus Asteracanthus) is described from the Lower Jurassic (Toarcian) Rosso Ammonitico Formation (Italy) by Romano et al. (2018), providing new information on the dispersal of this genus in the Jurassic Tethys.{{Cite journal|author1=Marco Romano |author2=Paolo Citton |author3=Aangelo Cipriani |author4=Simone Fabbi |year=2018 |title=First report of hybodont shark from the Toarcian Rosso Ammonitico Formation of Umbria-Marche Apennine (Polino area, Terni, Central Italy) |journal=Italian Journal of Geosciences |volume=137 |issue=1 |pages=151–159 |doi=10.3301/IJG.2018.01 |hdl=11336/97916 |hdl-access=free }}
• The first scroll coprolites from the Mesozoic reported so far, likely produced by euryhaline hybodontid sharks, are described from the Upper Triassic Tiki Formation of India by Rakshit et al. (2018), who name a new coprolite taxon Tikicopros triassicus.{{Cite journal|author1=Nibedita Rakshit |author2=Mohd Shafi Bhat |author3=Debarati Mukherjee |author4=Sanghamitra Ray |year=2018 |title=First record of Mesozoic scroll coprolites: classification, characteristics, elemental composition and probable producers |journal=Palaeontology |volume=62 |issue=3 |pages=451–471 |doi=10.1111/pala.12409 |s2cid=133986672 }}
• Description of new remains of the Late Jurassic shark Palaeocarcharias stromeri and a study on the anatomy and phylogenetic relationships of this species is published by Landemaine, Thies & Waschkewitz (2018), who name a new order Palaeocarchariiformes and a new family Palaeocarchariidae.{{Cite journal|author1=Olivier Landemaine |author2=Detlev Thies |author3=Jens Waschkewitz |year=2018 |title=The Late Jurassic shark Palaeocarcharias (Elasmobranchii, Selachimorpha) – functional morphology of teeth, dermal cephalic lobes and phylogenetic position |journal=Palaeontographica Abteilung A |volume=312 |issue=5–6 |pages=103–165 |doi=10.1127/0375-0442/2018/0000/0085 |bibcode=2018PalAA.312..103L |s2cid=146540287 }}
• Description of an articulated skeleton of a member of the palaeospinacid genus Synechodus from the Lower Cretaceous (Albian) Saint-Pô Formation (France), and a revision of the taxonomic history of the species assigned to the genus Synechodus, is published by Mollen & Hovestadt (2018).{{cite journal |author1=Frederik H. Mollen |author2=Dirk C. Hovestadt |year=2018 |title=A new partial skeleton of a palaeospinacid shark (Neoselachii, Synechodontiformes) from the Albian of northern France, with a review of the taxonomic history of Early Cretaceous species of Synechodus Woodward, 1888 |journal=Geodiversitas |volume=40 |issue=25 |pages=557–574 |doi=10.5252/geodiversitas2018v40a25 |s2cid=133688090 |url=http://sciencepress.mnhn.fr/en/periodiques/geodiversitas/40/25 |doi-access=free }}
• Late Cretaceous taxon Platylithophycus cretaceus known from the Niobrara Chalk of Kansas (United States), considered to be a green alga or a cuttlefish in earlier publications, is reinterpreted as a member of Elasmobranchii by Bronson & Maisey (2018).{{Cite journal|author1=Allison W. Bronson |author2=John G. Maisey |year=2018 |title=Resolving the identity of Platylithophycus, an enigmatic fossil from the Niobrara Chalk (Upper Cretaceous, Coniacian–Campanian) |journal=Journal of Paleontology |volume=92 |issue=4 |pages=743–750 |doi=10.1017/jpa.2018.14 |bibcode=2018JPal...92..743B |s2cid=135179588 }}
• A study on the microstructure of enameloid in the isolated teeth of archaeobatid batomorphs Toarcibatis elongata, Cristabatis crescentiformis and Doliobatis weisi from the Jurassic (Toarcian) localities of Halanzy (Belgium) and Ginzebierg (Luxembourg) is published by Manzanares, Botella & Delsate (2018).{{Cite journal|author1=E. Manzanares |author2=H. Botella |author3=D. Delsate |year=2018 |title=On the enameloid microstructure of Archaeobatidae (Neoselachii, Chondrichthyes) |journal=Journal of Iberian Geology |volume=44 |issue=1 |pages=67–74 |doi=10.1007/s41513-018-0049-3 |bibcode=2018JIbG...44...67M |s2cid=135288092 }}
• A study on the structure of teeth of Myledaphus pustulosus from the Upper Cretaceous (Maastrichtian) Hell Creek Formation (Montana, United States) is published by Hoffman, Jensen & Hageman (2018).{{Cite journal|author1=Brian L. Hoffman |author2=Jeffrey S. Jensen |author3=Scott A. Hageman |year=2018 |title=Dental structure of the Late Cretaceous (Maastrichtian) guitarfish (Neoselachii: Batoidea) Myledaphus pustulosus from the Hell Creek Formation of Garfield County, Montana |journal=Transactions of the Kansas Academy of Science |volume=121 |issue=3–4 |pages=279–296 |doi=10.1660/062.121.0412 |s2cid=92493020 }}
• Isolated teeth of the sand shark Brachycarcharias lerichei are described from the Eocene (Ypresian) La Meseta Formation (Antarctica) by Marramà et al. (2018), representing the southernmost occurrence of the genus Brachycarcharias reported so far.{{Cite journal|author1=Giuseppe Marramà |author2=Andrea Engelbrecht |author3=Thomas Mörs |author4=Marcelo A. Reguero |author5=Jürgen Kriwet |year=2018 |title=The southernmost occurrence of Brachycarcharias (Lamniformes, Odontaspididae) from the Eocene of Antarctica provides new information about the paleobiogeography and paleobiology of Paleogene sand tiger sharks |journal=Rivista Italiana di Paleontologia e Stratigrafia |volume=124 |issue=2 |pages=283–298 |doi=10.13130/2039-4942/9985 }}
• A study on the anatomy, paleobiology and paleoecology of the Eocene requiem shark Eogaleus bolcensis is published by Marramà, Carnevale & Kriwet (2018).{{Cite journal|author1=Giuseppe Marramà |author2=Giorgio Carnevale |author3=Jürgen Kriwet |year=2018 |title=New observations on the anatomy and paleobiology of the Eocene requiem shark †Eogaleus bolcensis (Carcharhiniformes, Carcharhinidae) from Bolca Lagerstätte, Italy |journal=Comptes Rendus Palevol |volume=17 |issue=7 |pages=443–459 |doi=10.1016/j.crpv.2018.04.005 |bibcode=2018CRPal..17..443M |doi-access=free }}
• Teeth of members of the genera Galeorhinus and Physogaleus are described from the Lower Eocene sediments of the Khuiala Formation (Jaisalmer basin, India) by Pandey, Chaskar & Case (2018).{{cite journal |author1=Dhirendra K. Pandey |author2=Ketan Chaskar |author3=Gerard R. Case |year=2018 |title=Two fossil shark teeth from Lower Eocene shales of the Khuiala Formation, Jaisalmer Basin, India |journal=Journal of the Palaeontological Society of India |volume=63 |issue=2 |pages=155–161 |doi=10.1177/0971102320180202 |url=https://www.researchgate.net/publication/331375548 }}
• A study on the teeth mineralization process and teeth histology in extant and fossil members of the genus Hemipristis is published by Jambura et al. (2018).{{Cite journal|author1=Patrick L. Jambura |author2=Cathrin Pfaff |author3=Charlie J. Underwood |author4=David J. Ward |author5=Jürgen Kriwet |year=2018 |title=Tooth mineralization and histology patterns in extinct and extant snaggletooth sharks, Hemipristis (Carcharhiniformes, Hemigaleidae)—Evolutionary significance or ecological adaptation? |journal=PLOS ONE |volume=13 |issue=8 |pages=e0200951 |doi=10.1371/journal.pone.0200951 |pmid=30089138 |pmc=6082511 |bibcode=2018PLoSO..1300951J |doi-access=free }}
• A study on the global and regional morphological variation of the teeth of the ground sharks and mackerel sharks across the Cretaceous–Paleogene boundary is published by Bazzi et al. (2018).{{Cite journal|author1=Mohamad Bazzi |author2=Benjamin P. Kear |author3=Henning Blom |author4=Per E. Ahlberg |author5=Nicolás E. Campione |year=2018 |title=Static dental disparity and morphological turnover in sharks across the end-Cretaceous mass extinction |journal=Current Biology |volume=28 |issue=16 |pages=2607–2615.e3 |doi=10.1016/j.cub.2018.05.093 |pmid=30078565 |s2cid=51893337 |doi-access=free |bibcode=2018CBio...28E2607B }}
• A study on the anatomy and evolution of teeth of members of the families Megachasmidae and Cetorhinidae, based on data from recent and fossil teeth, is published by Mitchell, Ciampaglio & Jacquemin (2018).{{Cite journal|author1=Michaela G. Mitchell |author2=Charles N. Ciampaglio |author3=Stephen J. Jacquemin |year=2018 |title=Convergent evolution in tooth morphology of filter-feeding lamniform sharks |journal=Southeastern Geology |volume=53 |issue=2 |pages=63–80 |url=https://www.researchgate.net/publication/332719045 }}
• A study on the physiological, ecological and life-history traits which influenced the biogeographic distributions of cartilaginous fishes from the Neogene to the present is published by Villafaña & Rivadeneira (2018).{{Cite journal|author1=Jaime from the AURTHOR OF JAMIE FOXX WE GOT THE ALCEERTthe Neogene to the present |title=The modulating role of traits on the biogeographic dynamics of chondrichthyans from the Neogene to the present |journal=Paleobiology |year=2018 |volume=44 |issue=2 |pages=251–262 |doi=10.1017/pab.2018.7 |bibcode=2018Pbio...44..251V |hdl=10533/232139 |s2cid=90234863 |hdl-access=free }}
• A review of the present and past (Miocene–Pleistocene) shark and ray diversity in marine waters of Tropical America is published by Carrillo-Briceño et al. (2018).{{Cite journal|author1=Jorge Domingo Carrillo-Briceño |author2=Juan D. Carrillo |author3=Orangel Antonio Aguilera |author4=Marcelo R. Sanchez-Villagra |year=2018 |title=Shark and ray diversity in the Tropical America (Neotropics)—an examination of environmental and historical factors affecting diversity |journal=PeerJ |volume=6 |pages=e5313 |doi=10.7717/peerj.5313 |pmid=30042900 |pmc=6055692 |doi-access=free }}
• A study on the phylogenetic relationships of extant and fossil squalomorph sharks as indicated by teeth morphology is published by Flammensbeck et al. (2018).{{Cite journal|author1=Christina K. Flammensbeck |author2=Jürgen Pollerspöck |author3=Frederic D. B. Schedel |author4=Nicholas J. Matzke |author5=Nicolas Straube |year=2018 |title=Of teeth and trees: A fossil tip-dating approach to infer divergence times of extinct and extant squaliform sharks |journal=Zoologica Scripta |volume=47 |issue=5 |pages=539–557 |doi=10.1111/zsc.12299 |s2cid=92485821 |doi-access=free }}
• A study on the morphology and phylogenetic relationships of an early bony fish known from two partial skulls recovered from the Devonian (Emsian) Taemas Limestones of the Burrinjuck area (New South Wales, Australia), possibly belonging to the genus Ligulalepis (described on the basis of isolated scales), is published by Clement et al. (2018).{{Cite journal|author1=Alice M. Clement |author2=Benedict King |author3=Sam Giles |author-link3=Sam Giles|author4=Brian Choo |author5=Per E. Ahlberg |author6=Gavin C. Young |author7=John A. Long |year=2018 |title=Neurocranial anatomy of an enigmatic Early Devonian fish sheds light on early osteichthyan evolution |journal=eLife |volume=7 |pages=e34349 |doi=10.7554/eLife.34349 |pmid=29807569 |pmc=5973833 |doi-access=free }}
• Redescription of Elonichthys germari is published by Schindler (2018), who presents the first reconstruction of the skull of this species.{{Cite journal|author=Thomas Schindler |year=2018 |title=Neubeschreibung und erste Rekonstruktion von Elonichthys germari Giebel, 1848 (Pisces, Actinopterygii; Oberkarbon, Mitteldeutschland) |journal=Hallesches Jahrbuch für Geowissenschaften |volume=41 |pages=1–33 |url=http://public.bibliothek.uni-halle.de/index.php/hjg/article/view/217 }}
• Redescription of the neotype of the elonichthyid Rhabdolepis macropterus is published by Schindler (2018), who presents new reconstruction of the skull of this species.{{Cite journal|author=Thomas Schindler |year=2018 |title=Revision of Rhabdolepis macropterus (Bronn, 1829) (Osteichthyes, lower Actinopterygii; Lower Permian, SW Germany) |journal=PalZ |volume=92 |issue=4 |pages=651–660 |doi=10.1007/s12542-018-0410-z |bibcode=2018PalZ...92..651S |s2cid=134215274 }}
• A revision of ray-finned fishes from the Permian locality Buxières-les-Mines (Bourbon-l’Archambault Basin, France) is published by Štamberg (2018).{{Cite journal|author=Stanislav Štamberg |year=2018 |title=Actinopterygians of the Permian locality Buxières-les-Mines (Bourbon-l'Archambault Basin, France) and their relationship to other early actinopterygians |journal=Fossil Imprint |volume=74 |issue=3–4 |pages=245–291 |url=http://fi.nm.cz/wp-content/uploads/2018/12/3_Stamberg.pdf |doi=10.2478/if-2018-0017 |s2cid=133993804 }}
• A study on the effect of Permian–Triassic and Triassic–Jurassic extinction events on ray-finned fishes is published by Smithwick & Stubbs (2018).{{Cite journal|author1=Fiann M. Smithwick |author2=Thomas L. Stubbs |year=2018 |title=Phanerozoic survivors: Actinopterygian evolution through the Permo-Triassic and Triassic-Jurassic mass extinction events |journal=Evolution |volume=72 |issue=2 |pages=348–362 |doi=10.1111/evo.13421 |pmid=29315531 |pmc=5817399 }}
• A study on the evolutionary history of ray-finned fishes across the Cretaceous–Paleogene extinction event, as indicated by isolated fossil teeth preserved in a South Pacific sediment core spanning 72–43 Ma, is published by Sibert et al. (2018).{{Cite journal|author1=Elizabeth Sibert |author2=Matt Friedman |author3=Pincelli Hull |author4=Gene Hunt |author5=Richard Norris |year=2018 |title=Two pulses of morphological diversification in Pacific pelagic fishes following the Cretaceous–Palaeogene mass extinction |journal=Proceedings of the Royal Society B: Biological Sciences |volume=285 |issue=1888 |pages=20181194 |doi=10.1098/rspb.2018.1194 |pmid=30305432 |pmc=6191689 }}
• A study on the morphological variation of the dorsal finlets in extant bichirs, testing the viability of these anatomic structures as a tool for taxonomic diagnoses in the study of fossil members of this group, is published by Coelho, Cupello & Brito (2018).{{Cite journal|author1=Marcos Vinícius Coelho |author2=Camila Cupello |author3=Paulo M. Brito |year=2018 |title=Morphological variations in the dorsal fin finlets of extant polypterids raise questions about their taxonomical validity |journal=PeerJ |volume=6 |pages=e5083 |doi=10.7717/peerj.5083 |pmid=30042877 |pmc=6056263 |doi-access=free }}
• New data on the reproductive biology of the species Saurichthys curionii and Saurichthys macrocephalus from the Middle Triassic Meride Limestone (Monte San Giorgio, Switzerland) is presented by Maxwell et al. (2018), who identify six specimens as unambiguously gravid.{{Cite journal|author1=Erin E. Maxwell |author2=Thodoris Argyriou |author3=Rudolf Stockar |author4=Heinz Furrer |year=2018 |title=Re-evaluation of the ontogeny and reproductive biology of the Triassic fish Saurichthys (Actinopterygii, Saurichthyidae) |journal=Palaeontology |volume=61 |issue=4 |pages=559–574 |doi=10.1111/pala.12355 |bibcode=2018Palgy..61..559M |s2cid=135337591 }}
• A study on the internal anatomy of the skulls of two Early Triassic specimens of Saurichthys, as well as on the phylogenetic relationships of saurichthyiforms, is published by Argyriou et al. (2018).{{Cite journal|author1=Thodoris Argyriou |author2=Sam Giles |author3=Matt Friedman |author4=Carlo Romano |author5=Ilja Kogan |author6=Marcelo R. Sánchez-Villagra |year=2018 |title=Internal cranial anatomy of Early Triassic species of †Saurichthys (Actinopterygii: †Saurichthyiformes): implications for the phylogenetic placement of †saurichthyiforms |journal=BMC Evolutionary Biology |volume=18 |issue=1 |pages=161 |doi=10.1186/s12862-018-1264-4 |pmid=30382811 |pmc=6211452 |doi-access=free |bibcode=2018BMCEE..18..161A }}
• A comparative study on the bony labyrinth of early neopterygians, including relatives of gars and teleosts, is published by Giles, Rogers & Friedman (2018).{{Cite journal|author1=Sam Giles |author-link1=Sam Giles|author2=Molly Rogers |author3=Matt Friedman |year=2018 |title=Bony labyrinth morphology in early neopterygian fishes (Actinopterygii: Neopterygii) |journal=Journal of Morphology |volume=279 |issue=4 |pages=426–440 |doi=10.1002/jmor.20551 |pmid=27165962 |s2cid=3867139|url=https://ora.ox.ac.uk/objects/uuid:739364be-cd9c-478d-af88-3f3f430cf2d3}}
• A study on the diversity of body shapes of neopterygians from the Triassic to the Early Cretaceous is published by Clarke & Friedman (2018).{{Cite journal|author1=John T. Clarke |author2=Matt Friedman |year=2018 |title=Body-shape diversity in Triassic–Early Cretaceous neopterygian fishes: sustained holostean disparity and predominantly gradual increases in teleost phenotypic variety |journal=Paleobiology |volume=44 |issue=3 |pages=402–433 |doi=10.1017/pab.2018.8 |bibcode=2018Pbio...44..402C |s2cid=90207334 |url=http://osf.io/2ytc5/ }}
• Redescription and taxonomic reassessment of the pycnodontiform genus Cosmodus is published by Vullo et al. (2018).{{Cite journal|author1=Romain Vullo |author2=Jean-Pierre Archambeau |author3=Gilles Bailly |author4=Pierre Bénéfice |year=2018 |title=Reassessment of Cosmodus Sauvage, 1879, a poorly known genus of large pycnodont fish (Actinopterygii, Pycnodontiformes) from the Cenomanian (Upper Cretaceous) of Western Europe |journal=Cretaceous Research |volume=91 |pages=217–228 |doi=10.1016/j.cretres.2018.05.019 |bibcode=2018CrRes..91..217V |s2cid=59435077 |url=https://hal-insu.archives-ouvertes.fr/insu-01819797/file/vullo-CretRes-2018.pdf }}
• A study on 52 specimens of Pycnodus from the Eocene Monte Bolca Lagerstätte (Italy), evaluating whether the morphological variability within the sample might be related to inter- or intraspecific variation, is published by Cawley et al. (2018).{{Cite journal|author1=John Joseph Cawley |author2=Giuseppe Marramà |author3=Giorgio Carnevale |author4=Jürgen Kriwet |year=2018 |title=A quantitative approach to determine the taxonomic identity and ontogeny of the pycnodontiform fish Pycnodus (Neopterygii, Actinopterygii) from the Eocene of Bolca Lagerstätte, Italy |journal=PeerJ |volume=6 |pages=e4809 |doi=10.7717/peerj.4809 |pmid=29796348 |pmc=5961631 |doi-access=free }}
• A study on the anatomical structure and possible function of the flank bar-scales of members of Pycnodontiformes is published by Capasso (2018).{{Cite journal|author=Luigi Capasso |year=2018 |title=The flank bar-scales in Pycnodontiformes, Berg (1937): morphology, structure, evolutionary significance, and possible functional interpretation as venom apparatus |journal=Bollettino del Museo Civico di Storia Naturale di Verona |volume=42 |pages=21–42 |url=http://www.museostorianaturaleverona.it/media/_Musei/_StoriaNaturale/_Allegati/Biblioteca/Bollettino/Bollettino%2042(2018)/gEOLOGIA%20pALEONTOLOGIA%20pREISTORIA/02._Capasso_42.pdf }}
• A revision of the phylogenetic relationships of the fossils fishes belonging to the group Halecomorphi is published by Ebert (2018).{{Cite journal|author=Martin Ebert |year=2018 |title=Cerinichthys koelblae, gen. et sp. nov., from the Upper Jurassic of Cerin, France, and its phylogenetic setting, leading to a reassessment of the phylogenetic relationships of Halecomorphi (Actinopterygii) |journal=Journal of Vertebrate Paleontology |volume=38 |issue=1 |pages=e1420071 |doi=10.1080/02724634.2017.1420071 |bibcode=2018JVPal..38E0071E |s2cid=89886438 |url=https://figshare.com/articles/journal_contribution/5990965 |url-access=subscription }}
• A redescription of Asialepidotus shingyiensis and a study on the phylogenetic relationships of the species is published by Xu & Ma (2018).{{cite journal |author1=Guang-Hui Xu |author2=Xin-Ying Ma |year=2018 |title=Redescription and phylogenetic reassessment of Asialepidotus shingyiensis (Holostei: Halecomorphi) from the Middle Triassic (Ladinian) of China |journal=Zoological Journal of the Linnean Society |volume=184 |issue=1 |pages=95–114 |doi=10.1093/zoolinnean/zlx105 }}
• A study on the phylogenetic relationships of the Triassic neopterygian Ticinolepis, as well as on the relationships of the fossil neopterygians in general, is published by López-Arbarello & Sferco (2018).{{cite journal |author1=Adriana López-Arbarello |author2=Emilia Sferco |year=2018 |title=Neopterygian phylogeny: the merger assay |journal=Royal Society Open Science |volume=5 |issue=3 |pages=172337 |doi=10.1098/rsos.172337 |pmid=29657820 |pmc=5882744 |bibcode=2018RSOS....572337L }}
• A study on the locomotion energetics of Leedsichthys problematicus, possible factors that drove the gigantism in pachycormiforms and the metabolic limits of body size in ray-finned fishes is published by Ferrón et al. (2018).{{Cite journal|author1=Humberto G. Ferrón |author2=Borja Holgado |author3=Jeffrey J. Liston |author4=Carlos Martínez-Pérez |author5=Héctor Botella |year=2018 |title=Assessing metabolic constraints on the maximum body size of actinopterygians: locomotion energetics of Leedsichthys problematicus (Actinopterygii, Pachycormiformes) |journal=Palaeontology |volume=61 |issue=5 |pages=775–783 |doi=10.1111/pala.12369 |bibcode=2018Palgy..61..775F |hdl=10550/85571 |s2cid=134886017 |hdl-access=free }}
• An ichthyodectiform fossil specimen preserving a small skull and anterior part of the trunk is described from a core recovered from a well drilled in the Cape Verde Basin, ca. 400 km offshore from the West African Atlantic Margin, by Casson et al. (2018).{{Cite journal|author1=Max Casson |author2=Lionel Cavin |author3=Jason Jeremiah |author4=Luc G. Bulot |author5=Jonathan Redfern |year=2018 |title=Fishing in the Central Atlantic, an earliest Cenomanian ichthyodectiform from DSDP Site 367, Cape Verde Basin |journal=Journal of Vertebrate Paleontology |volume=38 |issue=5 |pages=e1510415 |doi=10.1080/02724634.2018.1510415 |bibcode=2018JVPal..38E0415C |s2cid=92448325 |url=https://www.research.manchester.ac.uk/portal/en/publications/fishing-in-the-central-atlantic-an-earliest-cenomanian-ichthyodectiform-from-dsdp-site-367-cape-verde-basin(5e628cf1-6044-4abb-b49b-4ee1f9d72e64).html }}
• A study on the evolutionary history of the family Catostomidae, based on data from molecules, morphology and fossil record, is published by Bagley, Mayden & Harris (2018).{{Cite journal|author1=Justin C. Bagley |author2=Richard L. Mayden |author3=Phillip M. Harris |year=2018 |title=Phylogeny and divergence times of suckers (Cypriniformes: Catostomidae) inferred from Bayesian total-evidence analyses of molecules, morphology, and fossils |journal=PeerJ |volume=6 |pages=e5168 |doi=10.7717/peerj.5168 |pmid=30013838 |pmc=6035723 |doi-access=free }}
• A study on the phylogenetic relationships of members of Acanthomorpha and on the timescale of the radiation of this group is published by Alfaro et al. (2018), who report that crown ages for five of the six major percomorph subclades, and for the bulk of the species diversity in the sixth, coincide with the Cretaceous–Paleogene boundary.{{Cite journal|author1=Michael E. Alfaro |author2=Brant C. Faircloth |author3=Richard C. Harrington |author4=Laurie Sorenson |author5=Matt Friedman |author6=Christine E. Thacker |author7=Carl H. Oliveros |author8=David Černý |author9=Thomas J. Near |year=2018 |title=Explosive diversification of marine fishes at the Cretaceous–Palaeogene boundary |journal=Nature Ecology & Evolution |volume=2 |issue=4 |pages=688–696 |doi=10.1038/s41559-018-0494-6 |pmid=29531346 |bibcode=2018NatEE...2..688A |s2cid=3865532 }}
• A study on the morphology of the skeleton of Pholidophorus latiusculus, as well as on the phylogenetic relationships of this species, is published by Taverne (2018).{{cite journal |author=Louis Taverne |year=2018 |title=The Mesozoic fish genus Pholidophorus (Teleostei, Pholidophoriformes), with an osteological study of the type-species Pholidophorus latiusculus. Comments on some problems concerning the "pholidophoriform" fishes |journal=Geo-Eco-Trop |volume=42 |issue=1 |pages=89–116 |url=http://www.geoecotrop.be/uploads/publications/pub_421_07.pdf }}
• A study on the gill-arch anatomy in Late Cretaceous–early Paleogene members of Aulopiformes is published by Beckett, Giles & Friedman (2018).{{Cite journal|author1=Hermione Beckett |author2=Sam Giles |author-link2=Sam Giles|author3=Matt Friedman |year=2018 |title=Comparative anatomy of the gill skeleton of fossil Aulopiformes (Teleostei: Eurypterygii) |journal=Journal of Systematic Palaeontology |volume=16 |issue=14 |pages=1221–1245 |doi=10.1080/14772019.2017.1387184 |bibcode=2018JSPal..16.1221B |s2cid=90568133 |url=https://ora.ox.ac.uk/objects/uuid:845fc46d-63e3-4244-b38e-c54628e00e61 }}
• A new specimen of Spinocaudichthys with preserved intestinal tract is described from the Cretaceous (Cenomanian) Jbel Oum Tkout Lagerstätte (Morocco) by Davesne et al. (2018).{{Cite journal|author1=Donald Davesne |author2=Pierre Gueriau |author3=Didier B. Dutheil |author4=Loïc Bertrand |year=2018 |title=Exceptional preservation of a Cretaceous intestine provides a glimpse of the early ecological diversity of spiny-rayed fishes (Acanthomorpha, Teleostei) |journal=Scientific Reports |volume=8 |issue=1 |pages=Article number 8509 |doi=10.1038/s41598-018-26744-3 |pmid=29855529 |pmc=5981375 |bibcode=2018NatSR...8.8509D }}
• A study on the bone histology of extant opahs, comparing it with bones of their extant and fossil relatives (including "Aipichthys" velifer), and testing the hypothesized link between endothermy and cellular bone (bone containing embedded osteocyte cells) in teleosts, is published by Davesne et al. (2018).{{Cite journal|author1=Donald Davesne |author2=François J. Meunier |author3=Matt Friedman |author4=Roger B. J. Benson |author5=Olga Otero |year=2018 |title=Histology of the endothermic opah (Lampris sp.) suggests a new structure–function relationship in teleost fish bone |journal=Biology Letters |volume=14 |issue=6 |pages=20180270 |doi=10.1098/rsbl.2018.0270 |pmid=29950318 |pmc=6030602 }}
• An articulated skeleton of a juvenile toadfish distinct from Louckaichthys novosadi is described from the Oligocene Bituminous Marls Formation (Romania) by Pikryl et al. (2018).{{Cite journal|author1=Tomáš Pikryl |author2=Ionut Grădianu |author3=Victor Georgescu |author4=Giorgio Carnevale |year=2018 |title=A toadfish (Batrachoidiformes) from the Oligocene of the Eastern Carpathians (Piatra Neamt, Romania) |journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen |volume=287 |issue=2 |pages=241–248 |doi=10.1127/njgpa/2018/0715 }}
• A study on the dynamics of diversification, phenotypic evolution and habitat transitions in the ray-finned fish group Carangaria after the Cretaceous–Paleogene extinction event is published by Ribeiro et al. (2018).{{Cite journal|author1=Emanuell Ribeiro |author2=Aaron M. Davis |author3=Rafael A. Rivero-Vega |author4=Guillermo Ortí |author5=Ricardo Betancur-R |year=2018 |title=Post-Cretaceous bursts of evolution along the benthic-pelagic axis in marine fishes |journal=Proceedings of the Royal Society B: Biological Sciences |volume=285 |issue=1893 |pages=20182010 |doi=10.1098/rspb.2018.2010 |pmid=30963906 |pmc=6304066 }}
• A study on the phylogenetic relationships of the fossil snake mackerels and cutlassfishes from the Eocene (Ypresian) London Clay Formation (United Kingdom) is published by Beckett et al. (2018).{{Cite journal|author1=Hermione T. Beckett |author2=Sam Giles |author-link2=Sam Giles|author3=Zerina Johanson |author4=Matt Friedman |year=2018 |title=Morphology and phylogenetic relationships of fossil snake mackerels and cutlassfishes (Trichiuroidea) from the Eocene (Ypresian) London Clay Formation |journal=Papers in Palaeontology |volume=4 |issue=4 |pages=577–603 |doi=10.1002/spp2.1221 |bibcode=2018PPal....4..577B |hdl=2027.42/146609 |s2cid=89750616 |hdl-access=free }}
• Detailed description of the caudal skeleton of the Paleogene surgeonfish Arambourgthurus scombrurus is published by Carnevale & Tyler (2018).{{Cite journal|author1=Giorgio Carnevale |author2=James C. Tyler |year=2018 |title=The caudal skeleton of Arambourgthurus scombrurus (Arambourg, 1967), a Paleogene oceanic surgeonfish |journal=Proceedings of the Biological Society of Washington |volume=131 |issue=1 |pages=101–110 |doi=10.2988/17-00023 |s2cid=89971042 }}
• A study on the morphology of the Oligocene percoid fish Oligoserranoides budensis is published by Bieńkowska-Wasiluk & Pałdyna (2018).{{Cite journal|author1=M. Bieńkowska-Wasiluk |author2=M. Pałdyna |year=2018 |title=The Oligocene percoid fish, Oligoserranoides budensis (Heckel, 1856), from the Paratethys |journal=Geologica Acta |volume=16 |issue=1 |pages=75–92 |doi=10.1344/GeologicaActa2018.16.1.5 }}
• A study on the Pliocene fish fossils from the Kanapoi site (Kenya) and their implications for reconstructing lake and river environments in the Kanapoi Formation is published online by Stewart & Rufolo (2018).{{Cite journal|author1=Kathlyn M. Stewart |author2=Scott J. Rufolo |year=2018 |title=Kanapoi revisited: Paleoecological and biogeographical inferences from the fossil fish |journal=Journal of Human Evolution |volume=140 |pages=Article 102452 |doi=10.1016/j.jhevol.2018.01.008 |pmid=29602541 |s2cid=4505213 |doi-access=free }}
• A metacarpal bone of a specimen of Pteranodon, bearing teeth marks likely produced by a shark and by a saurodontid fish, is described from the Campanian Mooreville Chalk (Alabama, United States) by Ehret & Harrell (2018).{{Cite journal|author1=Dana J. Ehret |author2=T. Lynn Harrell, Jr. |year=2018 |title=Feeding traces on a Pteranodon (Reptilia: Pterosauria) bone from the Late Cretaceous (Campanian) Mooreville Chalk in Alabama, USA |journal=PALAIOS |volume=33 |issue=9 |pages=414–418 |doi=10.2110/palo.2018.024 |bibcode=2018Palai..33..414E |s2cid=135332458 }}
• A series of neck vertebrae of Pteranodon associated with a tooth of the lamniform shark Cretoxyrhina mantelli is described from the Upper Cretaceous Niobrara Formation (Kansas, United States) by Hone, Witton & Habib (2018), who interpret the specimen as evidence of Cretoxyrhina biting Pteranodon.{{Cite journal|author1=David W.E. Hone |author2=Mark P. Witton |author3=Michael B. Habib |year=2018 |title=Evidence for the Cretaceous shark Cretoxyrhina mantelli feeding on the pterosaur Pteranodon from the Niobrara Formation |journal=PeerJ |volume=6 |pages=e6031 |doi=10.7717/peerj.6031 |pmid=30581660 |pmc=6296329 |doi-access=free }}
• A mawsoniid coelacanth specimen is described from Rhaetian deposits of the Var Department (France) by Deesri et al. (2018), representing the first known coelacanth from the marine Triassic of France.{{Cite journal|author1=Uthumporn Deesri |author2=Lionel Cavin |author3=Romain Amiot |author4=Nathalie Bardet |author5=Eric Buffetaut |author6=Gilles Cuny |author7=Stephen Giner |author8=Jeremy E. Martin |author9=Guillaume Suan |year=2018 |title=A mawsoniid coelacanth (Sarcopterygii: Actinistia) from the Rhaetian (Upper Triassic) of the Peygros quarry, Le Thoronet (Var, southeastern France) |journal=Geological Magazine |volume=155 |issue=1 |pages=187–192 |doi=10.1017/S0016756817000619 |bibcode=2018GeoM..155..187D |s2cid=134867757 }}
• A study on both newly collected and earlier fossil material of Ventalepis ketleriensis from the Devonian (Famennian) of Latvia and central and northwestern Russia is published by Lebedev & Lukševičs (2018), who interpret the fossils as supporting the porolepiform affinities of this species, and name a new family Ventalepididae.{{cite journal |author1=Oleg Lebedev |author2=Ervīns Lukševičs |year=2018 |title=New materials on Ventalepis ketleriensis Schultze, 1980 extend the zoogeographic area of a Late Devonian vertebrate assemblage |journal=Acta Geologica Polonica |volume=68 |issue=3 |pages=437–454 |doi=10.1515/agp-2018-0023 |url=https://geojournals.pgi.gov.pl/agp/article/view/26056 |doi-broken-date=1 November 2024 }}
• Anatomical description of the endocast of "Chirodipterus" australis from the Upper Devonian Gogo Formation (Australia) is published by Henderson & Challands (2018).{{Cite journal|author1=Struan A.C. Henderson |author2=Tom J. Challands |year=2018 |title=The cranial endocast of the Upper Devonian dipnoan "Chirodipterus" australis |journal=PeerJ |volume=6 |pages=e5148 |doi=10.7717/peerj.5148 |pmid=30002977 |pmc=6037139 |doi-access=free }}
• A revision of the lungfish remains from the Triassic of the Świętokrzyskie Mountains and from the northeastern Poland is published by Skrzycki, Niedźwiedzki & Tałanda (2018), who report the first known Middle Triassic finding of Arganodus worldwide and the oldest known occurrence of Ptychoceratodus in Europe.{{Cite journal|author1=Piotr Skrzycki |author2=Grzegorz Niedźwiedzki |author3=Mateusz Tałanda |year=2018 |title=Dipnoan remains from the Lower-Middle Triassic of the Holy Cross Mountains and northeastern Poland, with remarks on dipnoan palaeobiogeography |journal=Palaeogeography, Palaeoclimatology, Palaeoecology |volume=496 |pages=332–345 |doi=10.1016/j.palaeo.2018.01.049 |bibcode=2018PPP...496..332S }}
• Lungfish burrows are reported for the first time from the Lower and Middle Triassic deposits of the Southern Cis-Urals by Sennikov (2018).{{cite journal |author=A. G. Sennikov |year=2018 |title=Lungfish (Dipnoi) burrows from the Triassic of the Southern Cis-Urals |journal=Paleontological Journal |volume=52 |issue=12 |pages=1408–1411 |doi=10.1134/S003103011812016X |bibcode=2018PalJ...52.1408S |s2cid=92099900 }}
• A study on the anatomy of the lungfish Mioceratodus gregoryi from the Eocene Redbank Plains Formation (Australia) is published by Kemp (2018).{{Cite journal|author=Anne Kemp |year=2018 |title=Adaptations to life in freshwater for Mioceratodus gregoryi, a lungfish from Redbank Plains, an Eocene locality in southeast Queensland, Australia |journal=Alcheringa: An Australasian Journal of Palaeontology |volume=42 |issue=2 |pages=305–310 |doi=10.1080/03115518.2017.1395076 |bibcode=2018Alch...42..305K |s2cid=135389476 }}
• Description of well-preserved pelvic fin skeleton of a specimen of Rhizodus hibberti from the Carboniferous (Viséan) Asbian Wardie Shales (United Kingdom) is published by Jeffery et al. (2018).{{Cite journal|author1=Jonathan E. Jeffery |author2=Glenn W. Storrs |author3=Timothy Holland |author4=Clifford J. Tabin |author5=Per E. Ahlberg |year=2018 |title=Unique pelvic fin in a tetrapod-like fossil fish, and the evolution of limb patterning |journal=Proceedings of the National Academy of Sciences of the United States of America |volume=115 |issue=47 |pages=12005–12010 |doi=10.1073/pnas.1810845115 |pmid=30397126 |pmc=6255188 |bibcode=2018PNAS..11512005J |doi-access=free }}
• A rediagnosis and redescription of Hyneria lindae based on new remains from the Catskill Formation (Pennsylvania, United States) is published by Daeschler & Downs (2018).{{Cite journal|author1=Edward B. Daeschler |author2=Jason P. Downs |year=2018 |title=New description and diagnosis of Hyneria lindae (Sarcopterygii, Tristichopteridae) from the Upper Devonian Catskill Formation in Pennsylvania, U.S.A. |journal=Journal of Vertebrate Paleontology |volume=38 |issue=3 |pages=e1448834 |doi=10.1080/02724634.2018.1448834 |bibcode=2018JVPal..38E8834D |s2cid=89661336 }}

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