2022 in paleoichthyology explained

This list of fossil fish research presented in 2022 is a list of new fossil taxa of jawless vertebrates, placoderms, cartilaginous fishes, bony fishes, and other fishes that were described during the year, as well as other significant discoveries and events related to paleoichthyology that occurred in 2022.

Jawless vertebrates

New jawless vertebrate taxa

Name	Novelty	Status	Authors	Age	Type locality	Notes
Aenigmaspis^[1]	Gen. et sp. nov	Valid	Thorsteinsson & Elliott	Silurian (Wenlock)	Cape Phillips Formation (Cornwallis Island	A member of Pteraspidomorphi. Genus includes new species A. falcata.
Anjiaspis ericius^[2]	Sp. nov	In press	Shan et al.	Silurian (Telychian)	Qingshui Formation	A member of Eugaleaspidiformes.
Anomalaspis	Gen. et sp. nov		Thorsteinsson & Elliott			A member of Traquairaspidiformes belonging to the family Traquairaspididae. Genus includes new species A. lacruma. The generic name is shared with Anomalaspis Brennan (1952).^[3]
Archegonaspis cornwallisensis	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae.
Arctictenaspis borealis	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Ctenaspidae.
Ariaspis cristata	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Ariaspidae.
Ariaspis majuscula	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Ariaspidae.
Ariaspis multijubata	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Ariaspidae.
Ariaspis nassichuki	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Ariaspidae.
Ariaspis perryi	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Ariaspidae.
Canadapteraspis formosa	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Protopteraspididae.
Canadapteraspis uniformis	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Protopteraspididae.
Corvaspis ellesmerensis	Sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Corvaspidiformes and the family Corvaspididae.
Corvaspis porphyretica	Sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Corvaspidiformes and the family Corvaspididae.
Corvaspis woodwardi	Sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Corvaspidiformes and the family Corvaspididae.
Denisonaspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Protopteraspididae. Genus includes new species D. borea.
Dinaspidella elegans	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae.
Dinaspidella tenuicostata	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae.
Eumorphaspis	Gen. et comb. et 3 sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae. Genus includes E. borealis (Denison, 1963), as well as new species E. goodsiri, E. lata and E. solitaria.
Geissonaspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Cyathaspidiformes. Genus includes new species G. mutabilis.
Genetaspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Cyathaspidiformes and the family Jarvikaspididae. Genus includes new species G. incohata.
Idanaspis	Gen. et 2 sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci. Genus includes new species I. dimidiata and I. reinsoni.
Jarvikaspis	Gen. et 2 sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Cyathaspidiformes; the type genus of the new family Jarvikaspididae. Genus includes new species J. arctica and J. mauryensis.
Jiangxialepis jiujiangensis^[4]	Sp. nov	In press	Shan, Zhao & Gai	Silurian (Telychian)	Qingshui Formation	A member of Eugaleaspidiformes.
Kyphaspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae. Genus includes new species K. boothiaensis.
Nahanniaspis mclintocki	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae.
Orthogoniaspis	Gen. et 2 sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Weigeltaspidiformes and the family Weigeltaspididae. Genus includes new species O. magnijubata and O. loefflerae.
Paralaspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae. Genus includes new species P. franklini.
Pionaspis ebenina	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae.
Pionaspis rossi	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae.
Prionotaspis	Gen. et 2 sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae. Genus includes new species P. miranda and possibly P? abbottensis.
Prosobranchiaspis	Gen. et 2 sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae. Genus includes new species P. prolatata and P. smithbayensis.
Pseudoanglaspis	Gen. et 2 sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae. Genus includes new species P. aquilonaris and P. minima.
Qingshuiaspis	Gen. et sp. nov	In press	Shan et al.	Silurian (Telychian)	Qingshui Formation	A member of Eugaleaspidiformes belonging to the family Shuyuidae. The type species is Q. junqingi.
Rimasventeraspis? halsteadi	Sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Natlaspidiformes and the family Rimasventeraspididae.
Rimasventeraspis? septentrionalis	Sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Natlaspidiformes and the family Rimasventeraspididae.
Soehnaspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Cyathaspidiformes. Genus includes new species S. polaris.
Teleaspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae. Genus includes new species T. tersa.
Thuleaspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Cyathaspidiformes and the family Jarvikaspididae. Genus includes new species T. canadensis.
Toraspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Weigeltaspidiformes; the type genus of the new family Toraspididae. Genus includes new species T. somersetensis.
Traquairaspis longicarinata	Sp. nov	Valid	Thorsteinsson & Elliott			A member of Traquairaspidiformes belonging to the family Traquairaspididae.
Traquairaspis pristina	Sp. nov	Valid	Thorsteinsson & Elliott			A member of Traquairaspidiformes belonging to the family Traquairaspididae.
Trygonaspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Protopteraspididae. Genus includes new species T. sicula.
Tujiaaspis^[5]	Gen. et sp. nov	Valid	Gai et al.	Silurian (Telychian)	Huixingshao Formation	A member of Eugaleaspidiformes; the anatomy of its articulated remains indicates that galeaspids possessed three unpaired dorsal fins, an approximately symmetrical hypochordal tail and a pair of continuous ventrolateral fins. The type species is T. vividus.
Vernonaspis magna	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae.
Vernonaspis parryi	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae.
Vernonaspis suffusca	Sp. nov	Valid	Thorsteinsson & Elliott			A member of the family Cyathaspididae.
Westollaspis	Gen. et 3 sp. nov	Valid	Thorsteinsson & Elliott			A member of Heterostraci belonging to the group Corvaspidiformes; the type genus of the new family Westollaspididae. Genus includes new species W. hyperborea, W. cordata and W. gigas.
Whiteaspis	Gen. et sp. nov	Valid	Thorsteinsson & Elliott			A member of Traquairaspidiformes belonging to the family Traquairaspididae. Genus includes new species W. spinifera.
Xitunaspis^[6]	Gen. et sp. nov	Valid	Sun et al.	Devonian (Lochkovian)	Xitun Formation	A member of Eugaleaspidiformes belonging to the family Eugaleaspidae. The type species is X. magnus.
Yongdongaspis^[7]	Gen. et sp. nov	Valid	Chen et al.	Silurian (Llandovery)	Huixingshao Formation	A member of Eugaleaspidiformes. Genus includes new species Y. littoralis.

Jawless vertebrate research

A study on the phylogenetic relationships and evolutionary history of lampreys is published by Brownstein & Near (2022), who find Mesomyzon mengae to be a member of the lamprey crown group, and argue that living lamprey biodiversity results from diversifications extending from the Cretaceous to present, rather than gradually accumulating since the Paleozoic.^[8]
Chevrinais et al. (2022) describe the ontogeny of Euphanerops longaevus.^[9]
Meng et al. (2022) describe new fossil material of Pterogonaspis yuhaii from the Devonian Xujiachong Formation (Yunnan, China), providing new information on the cranial anatomy of this galeaspid, including the first fossil evidence for the position of the esophagus in galeaspids.^[10]
The first detailed description of the complex of external endolymphatic structures in headshields of members of the genus Tremataspis from the Silurian of Estonia, with tiny platelets located within the openings of the endolymphatic duct and possibly functioning as a sieve that allowed or prevented material from entering the inner ear, is published by Märss, Wilson & Viljus (2022).^[11]

Placoderms

New placoderm taxa

Name	Novelty	Status	Authors	Age	Type locality	Notes
Amazichthys^[12]	Gen. et sp. nov	Valid	Jobbins et al.	Devonian (Famennian)		A member of the family Selenosteidae. The type species is A. trinajsticae.
Xiushanosteus^[13]	Gen. et sp. nov	Valid	Zhu, Li, Ahlberg & Zhu in Zhu et al.	Silurian (Telychian)	Huixingshao Formation	The type species is X. mirabilis.

Placoderm research

A study on the morphology and function of the antiarch jaw apparatus is published by Lebedev et al. (2022).^[14]
Wang & Zhu (2022) describe the squamation and scale morphology of Parayunnanolepis xitunensis, recognize at least thirteen morphotypes of scales in P. xitunensis, and interpret their findings as indicative of the high regionalization of squamation at the root of jawed vertebrates.^[15]
Zhu et al. (2022) redescribe the pelvic region of the holotype of Parayunnanolepis xitunensis, and report that, instead of having two large plates previously designated as dermal pelvic girdles, P. xitunensis had three pairs of lateral pelvic plates and one large oval median pelvic plate.^[16]
Trinajstic et al. (2022) report preservation of a three-dimensionally mineralized heart, thick-walled stomach and bilobed liver from members of Arthrodira from the Devonian Gogo Formation (Australia), and interpret this finding as indicative of the presence of a flat S-shaped heart separated from the liver and other abdominal organs, and of the absence of lungs in members of Arthrodira;^[17] subsequently Jensen et al. (2023) question evidence of the presence of a chambered heart in the studied fossil material presented by Trinajstic et al. (2022).^[18] ^[19]

Cartilaginous fishes

Cartilaginous fish research

A study aiming to quantify the completeness of the acanthodian fossil record is published by Schnetz et al. (2022).^[34]
A study on the biomechanical properties and likely function of bony spines in front of the fins of members of the genus Machaeracanthus is published by Ferrón et al. (2022).^[35]
Duffin, Lauer & Lauer (2022) describe chimaeroid egg cases from the Upper Jurassic (Tithonian) Altmühltal Formation (Germany), probably produced by Ischyodus quenstedti, and name a new ichnotaxon Chimaerotheca schernfeldensis.^[36]
Revision of the fossil material originally attributed to Bibractopiscis niger and Orthacanthus commailli, and a study on the implications of these fossils for the knowledge of the evolution of neurocranium in "ctenacanthiforms" and xenacanthiforms, is published by Luccisano et al. (2022).^[37]
A study on the evolutionary history of members of the genus Orthacanthus from France and on their relationships with the other European species is published by Luccisano et al. (2022).^[38]
Greif, Ferrón & Klug (2022) describe the first known fossil cartilage remains from the Devonian Hangenberg black shale from the Moroccan Anti-Atlas, and interpret its morphology as suggestive of ctenacanth affiliation.^[39]
Taxonomic reassessment of a hybodontiform dental assemblage from the lower Kimmeridgian of Czarnogłowy (Poland), and a study on the implications of this assemblage for the knowledge of ecology and biogeography of cartilaginous fishes prior to the Jurassic/Cretaceous transition, is published by Stumpf, Meng & Kriwet (2022)^[40]
Fossil teeth of sharks belonging to the groups Hexanchiformes, Echinorhiniformes, Squaliformes and Lamniformes, including the first record of Protosqualus in northwestern Pacific reported to date, are described from the Upper Cretaceous Nishichirashinai and Omagari formations (Yezo Group, Japan) by Kanno et al. (2022).^[41]
New fossil material of Xampylodon dentatus, including more complete teeth or specimens representing teeth of different positions than most previous records, and the oldest fossil material of Rolfodon tatere reported to date is described from the Upper Cretaceous (Campanian) of James Ross Island (Antarctica) by dos Santos et al. (2022).^[42]
Feichtinger et al. (2022) describe isolated teeth of Protoxynotus misburgensis from the Santonian of Lebanon, representing the first known record of this species from the southern Tethyan Realm, and interpret this finding as indicating that Protoxynotus and Cretascymnus occupied overlapping or similar habitats during the Late Cretaceous.^[43]
Herraiz et al. (2022) describe teeth of a member of the genus Trigonognathus from the El Ferriol outcrop (Miocene of Spain), representing the first known record of this genus from the Mediterranean realm.^[44]
Revision of the fossil record of the genus Echinorhinus in South America is published by Bogan & Agnolín (2022), who consider Echinorhinus pozzi and Echinorhinus maremagnum to be valid species, and consider E. maremagnum to be distinct from Echinorhinus lapaoi.^[45]
A study on the anatomy, growth and ecology of Cretodus crassidens, based on data from a specimen from the Turonian "Lastame" lithofacies of the Scaglia Rossa Veneta (Lessini Mountains, Veneto, northeastern Italy), is published by Amalfitano et al. (2022).^[46]
A tooth of Cetorhinus huddlestoni, as well as gill rakers differing from previously described cetorhinids and referred to the same species as the tooth, are described from the Miocene Duho Formation (South Korea) by Malyshkina, Nam & Kwon (2022).^[47]
A study aiming to determine whether the observed body forms of lamniform sharks are influenced by thermophysiology, and reevaluating the body form of Otodus megalodon proposed by Cooper et al. (2020),^[48] is published by Sternes, Wood & Shimada (2022).^[49]
A study on the putative nursery areas and body size patterns across different populations of Otodus megalodon is published by Shimada et al. (2022), who report that specimens of O. megalodon are on average larger in cooler water than those in warmer water, and argue that the previously identified nursery areas may reflect temperature-dependent trends rather than the inferred reproductive strategy.^[50]
McCormack et al. (2022) demonstrate the use of zinc isotopes to assess the trophic level in extant and extinct sharks, and interpret their findings as indicative of dietary shifts throughout the Neogene in sharks belonging to the genera Otodus and Carcharodon, and indicating that Early Pliocene sympatric great white sharks and Otodus megalodon likely occupied a similar mean trophic level.^[51]
Evidence from nitrogen isotope ratios in fossil teeth of members of the genus Otodus, indicating that O. megalodon occupied a higher trophic level than is known for any marine species, extinct or extant, is presented by Kast et al. (2022).^[52]
Cooper et al. (2022) create the first three-dimensional model of the body of Otodus megalodon and use it to infer its movement and feeding ecology, interpreting it as likely able to swim great distances and to feed on prey as large as modern apex predators.^[53]
A study on tooth marks on physeteroid bones from the Miocene Pisco Formation (Peru) is published by Benites-Palomino et al. (2022), who interpret their findings as indicating that Miocene sharks were actively targeting the foreheads of physeteroids to feed on their lipid-rich nasal complexes, with the shape and distribution of the bite marks suggesting a series of consecutive scavenging events by members of different shark species.^[54]
A study on the evolutionary history of carcharhiniform sharks is published by Brée, Condamine & Guinot (2022), who interpret their findings as indicative of an early low diversity period followed by a radiation exacerbated since 30 million years ago, as well as indicating that variations in diversification through time were likely linked to reef expansion and temperature change.^[55]
Greenfield, Delsate & Candoni (2022) coin a new name Toarcibatidae for the family of Toarcian batomorphs previously referred to as Archaeobatidae.^[56]
A study on the microstructure of rostral denticles of Ischyrhiza mira is published by Cook et al. (2022)^[57]
New record of large dermal tubercles and bucklers, including tubercles similar in morphology to "Ceratoptera unios" and dermal bucklers similar in morphology to those of the extant roughtail stingray, is reported from the Lower Pleistocene Waccamaw Formation (South Carolina, United States) by Boessenecker & Gibson (2022), who interpret this findings as likely fossils of large stingrays in excess of 3 m disc width.^[58]
A study on the phylogenetic relationships of extant and fossil rays and skates is published by Villalobos-Segura et al. (2022).^[59]
A study on the completeness of the chondrichthyan fossil record from Florida, aiming to determine patterns in taxonomic and ecomorphological diversity of Eocene to Pleistocene chondrichthyans from the Florida Platform, is published by Perez (2022).^[60]
Szabó et al. (2022) describe an assemblage of cartilaginous fishes from the Miocene Tekeres Schlieren Member of the Baden Formation (Hungary), including the first known records of deepwater cartilaginous fishes from the Badenian of the Central Paratethys.^[61]
Fossil material of a diverse shark and ray fauna is reported from the early Pleistocene of Taiwan by Lin, Lin & Shimada (2022).^[62]

Ray-finned fishes

New ray-finned fish taxa

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes
Acentrogobius matsya^[63]	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		A species of Acentrogobius.
Acipenser amnisinferos^[64]	Sp. nov	Valid	Hilton & Grande	Late Cretaceous (Maastrichtian)	Hell Creek Formation		A species of Acipenser.
Acipenser praeparatorum	Sp. nov	Valid	Hilton & Grande	Late Cretaceous (Maastrichtian)	Hell Creek Formation		A species of Acipenser.
Allocyclostoma^[65]	Gen. et sp. nov	In press	Schwarzhans, Stringer & Welton	Early Cretaceous (Albian)	Pawpaw Formation		Possibly a member of Polymixiiformes. The type species is A. alienus.
Amblyeleotris kireedam	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		A species of Amblyeleotris.
Ancistrogobius indicus	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		A species of Ancistrogobius.
Anisotremus rambo^[66]	Sp. nov	Valid	Lin & Nolf	Eocene		( )	A species of Anisotremus.
Archaeotolithus doppelsteini^[67]	Sp. nov	Valid	Schwarzhans & Keupp	Early Jurassic (Pliensbachian)	Amaltheenton Formation		A member of Actinopterygii of uncertain affinities.
Arconiapogon^[68]	Gen. et sp. nov	Valid	Marramà, Giusberti & Carnevale	Oligocene (Rupelian)			A member of the family Apogonidae belonging to the subfamily Apogoninae. The type species is A. deangelii.
Argentina? texana	Sp. nov	In press	Schwarzhans, Stringer & Welton	Early Cretaceous (Albian)	Pawpaw Formation		Possibly a species of Argentina.
Armigatus felixi^[69]	Sp. nov	In press	Than-Marchese & Alvarado-Ortega	Early Cretaceous (Albian)	Tlayúa Formation
Astroscopus compactus	Sp. nov	Valid	Lin & Nolf	Eocene	Gosport Sand	( )	A species of Astroscopus.
Atractosteus grandei^[70]	Sp. nov		Brownstein & Lyson	Paleogene (Danian)	Fort Union Formation		A gar, a species of Atractosteus.
Bellottia verecunda^[71]	Sp. nov	Valid	Carnevale & Schwarzhans	Miocene (Messinian) and Pliocene			A species of Bellottia.
Benthosema taurinense	Sp. nov	Valid	Carnevale & Schwarzhans	Miocene (Tortonian and Messinian)			A species of Benthosema.
Bidenichthys mediterraneus	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Bidenichthys.
Blennius vernyhorovae^[72]	Sp. nov		Schwarzhans, Klots & Kovalchuk in Schwarzhans et al.	Miocene			Originally described as a species of Blennius, but subsequently transferred to the genus Thalassoma.^[73]
Bolinichthys higashibesshoensis^[74]	Sp. nov	Valid	Schwarzhans et al.	Miocene	Higashibessho Formation		A species of Bolinichthys.
Bostrychus marsilii	Sp. nov	Valid	Carnevale & Schwarzhans	Miocene (Messinian)			A species of Bostrychus.
Bradyurus alessandroi^[75]	Sp. nov	Valid	Bannikov & Zorzin	Eocene	Monte Bolca		A member of Percoidei of uncertain phylogenetic placement.
Buenia pulvinus^[76]	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene		^[77]	A species of Buenia.
Caboellimma^[78]	Gen. et comb. nov		De Figueiredo & Gallo	Early Cretaceous	Cabo Formation		A member of Clupeomorpha belonging to the group Ellimmichthyiformes; a new genus for "Ellimma" cruzae Santos (1990).
Callionymus vyali	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		A species of Callionymus.
Calypsoichthys^[79]	Gen. et sp. nov	Valid	Argyriou et al.	Late Cretaceous (Maastrichtian)			A member of the family Enchodontidae. The type species is C. pavlakiensis.
Cantarius ohei^[80]	Sp. nov		Schwarzhans et al.	Miocene	Pebas Formation		A member of the family Ariidae.
Capassopiscis^[81]	Gen. et sp. nov	Valid	Taverne	Late Cretaceous (Cenomanian)			A member of the family Pantodontidae. The type species is C. pankowskii.
Centroberyx vaalsensis^[82]	Sp. nov	In press	Schwarzhans & Jagt	Late Cretaceous (Campanian)	Vaals Formation		A species of Centroberyx.
Ceratoscopelus brevis	Sp. nov	Valid	Schwarzhans et al.	Miocene	Takakura Formation		A species of Ceratoscopelus.
Chaetodon wattsi	Sp. nov	Valid	Marramà, Giusberti & Carnevale	Oligocene (Rupelian)			A species of Chaetodon.
Cheirolepis bychovensis^[83]	Sp. nov	Valid	Plax	Devonian (Emsian and Eifelian)	Lepel Beds		An early ray-finned fish.
Cichlasoma bluntschlii	Sp. nov		Schwarzhans et al.	Miocene	Pebas Formation		A species of Cichlasoma.
Cirripectes biconvexus	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		A species of Cirripectes.
"Citharus" varians	Sp. nov	Valid	Lin & Nolf	Eocene	Cook Mountain Formation	( )	A member of the family Citharidae.
Concentrilepis^[84]	Gen. et sp. nov	Valid	Stack & Gottfried	Permian (Kungurian)	Minnekahta Limestone		An early ray-finned fish with anatomical features of the paraphyletic "paleoniscoids". The type species is C. minnekahtaensis.
Coreoperca chosun^[85]	Sp. nov	In press	Nam, Nazarkin & Bannikov	Early Miocene	Geumgwangdong Formation		A species of Coreoperca.
Coris medoboryensis	Sp. nov		Schwarzhans, Klots & Kovalchuk in Schwarzhans et al.	Miocene			A species of Coris.
Cuneatus maximus^[86]	Sp. nov	Valid	Brownstein	Late Paleocene to early Eocene	Willwood Formation		A gar.
Diaphus epipedus	Sp. nov	Valid	Schwarzhans et al.	Miocene	Takakura Formation		A species of Diaphus.
Diaphus mermuysi	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Diaphus.
Diaphus postcavallonis	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Diaphus.
Diaphus watatsumi	Sp. nov	Valid	Schwarzhans et al.	Miocene	Takakura Formation		A species of Diaphus.
Dicentrarchus oligocenicus^[87]	Sp. nov	In press	Grădianu, Bordeianu & Codrea	Oligocene	Bituminous Marls Formation		A species of Dicentrarchus.
Drombus thackerae	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		A species of Drombus.
Elopothrissus bernardlemorti	Sp. nov	Valid	Lin & Nolf	Eocene		( )	A member of Albuliformes.
Elopothrissus pawpawensis	Sp. nov	In press	Schwarzhans, Stringer & Welton	Early Cretaceous (Albian)	Pawpaw Formation
Eosciaena^[88]	Gen. et sp. nov	Valid	Stringer, Parmley & Quinn	Eocene (Bartonian)	Clinchfield Formation	( )	A member of the family Sciaenidae. The type species is E. ebersolei.
Fibramia keralensis	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		A species of Fibramia.
Fowleria velerinensis	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Fowleria.
Francischanos^[89]	Gen. et comb. nov	In press	Ribeiro, Bockmann & Poyato-Ariza	Early Cretaceous (Aptian)	Quiricó Formation		A member of the family Chanidae; a new genus for "Dastilbe" moraesi Silva-Santos (1955).
Fusigobius? venadicus	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		Possibly a species of Fusigobius.
Genartina princeps	Sp. nov	In press	Schwarzhans, Stringer & Welton	Early Cretaceous (Albian)	Pawpaw Formation		A teleost of uncertain affinities, possibly near Albuliformes.
Germanostomus^[90]	Gen. et sp. nov	Valid	Cooper et al.	Early Jurassic (Toarcian)	Posidonia Shale		A member of the family Pachycormidae belonging to the subfamily Asthenocorminae. The type species is G. pectopteri.
Gerres mlynskyi^[91]	Sp. nov	Valid	Brzobohatý, Zahradníková & Hudáčková	Miocene	Vienna Basin		A species of Gerres.
"aff. Glyptophidium" stringeri	Sp. nov	Valid	Lin & Nolf	Eocene		( )	A cusk-eel. Subsequently transferred to the genus Baobythites by Schwarzhans, Stringer & Takeuchi (2024).^[92]
Gnathophis henkmulderi	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Gnathophis.
Gobiodon burdigalicus	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		A species of Gobiodon.
Gobius alboranensis	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Gobius.
Gobius bratishkoi	Sp. nov		Schwarzhans, Klots & Kovalchuk in Schwarzhans et al.	Miocene			A species of Gobius.
Gobius lombartei	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Gobius.
"Gobius" pterois	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A possible species of Gobius.
Gobius ukrainicus	Sp. nov		Schwarzhans, Klots & Kovalchuk in Schwarzhans et al.	Miocene			A species of Gobius.
Harenaichthys^[93]	Gen. et sp. nov	In press	Kim et al.	Late Cretaceous (Maastrichtian)	Nemegt Formation		A member of Osteoglossomorpha. The type species is H. lui.
Ichthyotringa? cuneata	Sp. nov	In press	Schwarzhans, Stringer & Welton	Early Cretaceous (Albian)	Pawpaw Formation		A member of Aulopiformes belonging to the family Ichthyotringidae.
Ichthyotringa pindica	Sp. nov	Valid	Argyriou et al.	Late Cretaceous (Maastrichtian)
Italopterus^[94]	Gen. et comb. nov	Valid	Shen & Arratia	Triassic			A member of the family Thoracopteridae. Genus includes "Thoracopterus" magnificus Tintori & Sassi (1987) and "Thoracopterus" martinisi Tintori & Sassi (1992).
Jaydia? quilonica	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		Possibly a species of Jaydia.
Jenynsia herbsti^[95]	Sp. nov	Valid	Sferco et al.	Late Miocene			A species of Jenynsia.
Kaykay^[96]	Gen. et sp. nov	Valid	Gouiric-Cavalli & Arratia	Jurassic (Oxfordian stage)			A member of Pachycormiformes. Genus includes new species K. lafken.
Kryptophanaron nolfi	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Kryptophanaron.
Kutaichthys^[97]	Gen et 2 sp. nov	Valid	Bakaev in Esin & Bakaev	Permian		( )	An early ray-finned fish belonging to the group Palaeonisciformes and the family Palaeoniscidae. The type species is K. gubini Esin & Bakaev; genus also includes K. dozmerensis Esin & Bakaev. Published online in 2023, but the issue date is listed as December 2022.
Lampadena exima	Sp. nov	Valid	Schwarzhans et al.	Miocene	Takakura Formation		A species of Lampadena.
Lampanyctus beczynensis^[98]	Sp. nov	Valid	Schwarzhans & Radwańska	Miocene (Langhian)			A species of Lampanyctus.
Lampanyctus lenticularis	Sp. nov	Valid	Schwarzhans et al.	Miocene	Takakura Formation		A species of Lampanyctus.
Lampanyctus tsuyamaensis	Sp. nov	Valid	Schwarzhans et al.	Miocene	Takakura Formation		A species of Lampanyctus.
Leptolepis buttenheimensis	Sp. nov	Valid	Schwarzhans & Keupp	Early Jurassic (Pliensbachian)	Amaltheenton Formation		Extinct species of ray finned fish.
Leptolepis steberae	Sp. nov	Valid	Schwarzhans & Keupp	Early Jurassic (Pliensbachian)	Amaltheenton Formation
Libyachromis^[99]	Gen. et sp. nov	Valid	Přikryl, Kaur & Murray	Oligocene			A cichlid belonging to the subfamily Pseudocrenilabrinae. The type species is L. fugacior.
Lophionotus parnaibensis^[100]	Sp. nov	In press	Gallo et al.	Late Jurassic	Pastos Bons Formation		A member of the family Semionotidae.
Makaira colonense^[101]	Sp. nov	Valid	De Gracia et al.	Late Miocene	Chagres Formation		A species of Makaira.
Makaira fierstini	Sp. nov	Valid	De Gracia et al.	Late Miocene	Gatún Formation		A species of Makaira.
Marcopoloichthys furreri^[102]	Sp. nov	Valid	Arratia	Middle Triassic (Ladinian)	Upper Prosanto Formation		A member of Teleosteomorpha belonging to the family Marcopoloichthyidae.
Medoborichthys	Gen. et 2 sp. nov		Schwarzhans, Klots & Kovalchuk in Schwarzhans et al.	Miocene			A member of the family Gobiidae belonging to the Priolepis lineage within the subfamily Gobiinae. The type species is M. renesulcis; genus also includes M. podolicus.
Mene garviei	Sp. nov	Valid	Lin & Nolf	Eocene	Cook Mountain Formation		A species of Mene.
Minicholepis^[103]	Gen et sp. nov	Valid	Bulanov, Minikh & Golubev	Permian			A member of Eurynotoidiformes. The type species is M. primus. Published online in 2023, but the issue date is listed as December 2022.
Moldavigobius^[104]	Gen. et sp. et comb. nov	Valid	Reichenbacher & Bannikov	Miocene			A member of the family Gobiidae. The type species is M. helenae; genus also includes "Knipowitschia" suavis Schwarzhans (2014).
Morgula	Gen. et sp. nov	Valid	De Gracia et al.	Late Miocene	Chagres Formation		A marlin. The type species is M. donosochagrense.
"Muraenesox" barrytownensis	Sp. nov	Valid	Lin & Nolf	Eocene	Lisbon Formation	( )	A member of the family Muraenesocidae.
Neoopisthopterus weltoni	Sp. nov	Valid	Lin & Nolf	Eocene	Cook Mountain Formation		A species of Neoopisthopterus.
Nezumia prikryli^[105]	Sp. nov	Valid	Schwarzhans	Miocene (Langhian)			A species of Nezumia.
Notogoneus maarvelis^[106]	Sp. nov	Valid	Grande & Wilson in Grande et al.	Late Cretaceous (Campanian)			A member of the family Gonorynchidae.
Nusaviichthys^[107]	Gen. et sp. nov	In press	Alvarado-Ortega & Alves	Early Cretaceous (Albian)			A member of Crossognathiformes belonging to the family Notelopidae. The type species is N. nerivelai.
Oechsleria^[108]	Gen. et sp. nov	In press	Micklich & Bannikov	Oligocene (Rupelian)	Bodenheim Formation		A member of the family Veliferidae. The type species is O. unterfeldensis.
Oligophus bartonensis^[109]	Sp. nov	Valid	Schwarzhans & Carnevale	Eocene (Bartonian)	Marne di Monte Piano Formation		A lanternfish.
Oligopseudamia	Gen. et sp. nov	Valid	Marramà, Giusberti & Carnevale	Oligocene (Rupelian)			A member of the family Apogonidae belonging to the subfamily Pseudaminae. The type species is O. iancurtisi.
Oniketia	Gen. et sp. nov	Valid	Marramà, Giusberti & Carnevale	Oligocene (Rupelian)			A member of the family Gobiidae. The type species is O. akihitoi.
Pagellus pamunkeyensis	Sp. nov	Valid	Lin & Nolf	Eocene	Piney Point Formation		A species of Pagellus.
Palaeoneiros^[110]	Gen. et sp. nov	Valid	Giles et al.	Devonian (Famennian)	Chadakoin Formation		An early ray-finned fish with affinities to post-Devonian species Wendyichthys dicksoni and Cyranorhis bergeraci. Genus includes new species P. clackorum.
Paleoschizothorax diluculum^[111]	Sp. nov	Valid	Yang et al.	Oligocene	Shangganchaigou Formation		A member of the family Cyprinidae related to Schizothorax.
Paraconger pinguis	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Paraconger.
Paraconger wechesensis	Sp. nov	Valid	Lin & Nolf	Eocene	Weches Formation		A member of the family Congridae. Originally described as a species of Paraconger; subsequently transferred to the genus Protanago by Schwarzhans, Stringer & Takeuchi (2024).
Parascombrops yanceyi	Sp. nov	Valid	Lin & Nolf	Eocene			A species of Parascombrops.
Paraulopus wichitae	Sp. nov	In press	Schwarzhans, Stringer & Welton	Early Cretaceous (Albian)	Pawpaw Formation		A species of Paraulopus.
Parenypnias	Gen. et 2 sp. nov		Schwarzhans, Klots & Kovalchuk in Schwarzhans et al.	Miocene			A member of the family Gobiidae belonging to the subfamily Gobiinae and the tribe Gobiosomatini. The type species is P. inauditus; genus also includes P. kiselevi.
Pavarottia astescalpone^[112]	Sp. nov	Valid	Bannikov & Zorzin	Eocene	Monte Bolca		A member of Percoidei belonging to the family Pavarottiidae.
Pebasciaena	Gen. et sp. nov		Schwarzhans et al.	Miocene	Pebas Formation		A member of the family Sciaenidae. The type species is P. amazonensis.
Piratata^[113]	Gen. et sp. nov	In press	Richter et al.	Permian (Cisuralian)	Pedra de Fogo Formation		A deep-scaled ray-finned fish. Genus includes new species P. rogersmithii.
Plagioscion peyeri	Sp. nov		Schwarzhans et al.	Miocene	Pebas Formation		A species of Plagioscion.
Pleuropholis germinalis^[114]	Sp. nov	Valid	Olive, Taverne & Brito	Early Cretaceous (Barremian to Aptian)	Sainte-Barbe Clays Formation
Pogonias tetragonus	Sp. nov		Schwarzhans et al.	Miocene	Pebas Formation		A species of Pogonias.
Polyspinatus^[115]	Gen. et sp. nov		Schrøder et al.	Eocene	Fur Formation		A beardfish. Genus includes new species P. fluere.
Prionotus arenarius	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Prionotus.
Pristigenys adrianae	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Pristigenys.
Protoholocentrus	Gen. et sp. nov	In press	Schwarzhans & Jagt	Late Cretaceous (Campanian)	Vaals Formation		A member of Holocentriformes of uncertain affinities. The type species is P. janjanssensi.
Prototetrapturus	Gen. et comb. nov	Valid	De Gracia et al.	Miocene (Messinian)			A marlin. The type species is "Xiphiorhynchus" courcelli Arambourg (1927).
Pseudophichthys texanus	Sp. nov	Valid	Lin & Nolf	Eocene	Weches Formation	( )	A species of Pseudophichthys.
Pythonichthys gibbosus	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Pythonichthys.
Saurenchelys silex	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Saurenchelys.
Saurichthys sui^[116]	Sp. nov	In press	Fang & Wu	Late Triassic	Junggar Basin
Saurichthys taotie^[117]	Sp. nov	Valid	Fang et al.	Late Triassic (Carnian)	Xiaowa Formation		Announced in 2022; the final article version was published in 2023.
Scomber collettei^[118]	Sp. nov	Valid	Bannikov & Erebakan	Miocene			A species of Scomber.
Seinstedtia^[119]	Gen. et sp. nov	Valid	Schultze et al.	Late Triassic (Norian)			A member of Teleosteomorpha of uncertain affinities. The type species is S. parva.
Sillaginocentrus crispus	Sp. nov	In press	Schwarzhans & Jagt	Late Cretaceous (Campanian)	Vaals Formation		A member of Holocentriformes of uncertain affinities.
Siphamia minor	Sp. nov	In press	Carolin et al.	Miocene (Burdigalian)	Quilon Formation		A species of Siphamia.
Smithconger^[120]	Gen. et comb. nov	Valid	Carnevale et al.	Eocene	Lillebælt Clay Formation		A member of the family Congridae. The type species is "Pseudoxenomystax" treldeensis Schwarzhans (2007); genus also includes "Bathycongrus" waihaoensis Schwarzhans (2019).
Snyderina stillaformis	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Snyderina.
Somalichromis^[121]	Gen. et sp. nov		Murray	Oligocene	Daban Series	Somaliland	A cichlid belonging to the subfamily Pseudocrenilabrinae. The type species is S. hadrocephalus.
Spathochoira	Gen. et comb. nov	Valid	De Gracia et al.	Late Miocene	Eastover Formation		A marlin. The type species is "Istiophorus" calvertensis Berry (1917).
Spinascutichthys^[122]	Gen. et sp. nov	Valid	Murray, Chida & Holmes	Late Cretaceous (Cenomanian)			A member of Aulopiformes belonging to the group Enchodontoidei. Genus includes new species S. pankowskiae.
Stenobrachius ohashii	Sp. nov	Valid	Schwarzhans et al.	Miocene	Kurosedani Formation		A species of Stenobrachius.
Stenobrachius sangsunii^[123]	Sp. nov		Nam & Nazarkin	Miocene	Duho Formation		A species of Stenobrachius.
Sturisomatichthys podgornyi^[124]	Sp. nov	Valid	Bogan & Agnolin	Late Miocene			A species of Sturisomatichthys.
Symmetrosulcus dockeryi	Sp. nov	Valid	Lin & Nolf	Eocene	Weches Formation	( )	A cusk-eel.
Teffichthys elegans^[125]	Sp. nov	Valid	Yuan et al.	Early Triassic (Induan)	Daye Formation		A member of the family Perleididae.
Texoma	Gen. et sp. nov	In press	Schwarzhans, Stringer & Welton	Early Cretaceous (Albian)	Pawpaw Formation		Possibly a member of Polymixiiformes. The type species is T. cyclogaster.
Thorogobius antirostratus	Sp. nov	Valid	Brzobohatý, Zahradníková & Hudáčková	Miocene	Vienna Basin		A species of Thorogobius.
Thorogobius mirbachae	Sp. nov	Valid	Van Hinsbergh & Hoedemakers	Pliocene			A species of Thorogobius.
Trachinus meridianus^[126]	Sp. nov	Valid	Schwarzhans & Kovalchuk	Miocene			A species of Trachinus.
Umbrina pachaula	Sp. nov		Schwarzhans et al.	Miocene	Pebas Formation		A species of Umbrina.
Vologdinia	Gen et comb. nov	Valid	Bulanov, Minikh & Golubev	Permian	Poldarsa/Poldarskaya Formation	( )	A member of Eurynotoidiformes. The type species is "Isadia" opokiensis Minikh & Andrushkevich (2017). Published online in 2023, but the issue date is listed as December 2022.
Waitakia beelzebub	Sp. nov	Valid	Lin & Nolf	Eocene	Piney Point Formation	( )	A member of the subfamily Hemerocoetinae.
Xinjiangodus^[127]	Gen. et sp. nov	Junior homonym	Zhou et al.	Late Cretaceous	Donggou Formation		A member of the family Pycnodontidae. Genus includes new species X. gyrodoides. The generic name is preoccupied by Xinjiangodus Yue & Gao (1992).

Ray-finned fish research

A new database of the occurrences of Paleozoic ray-finned fishes is presented by Henderson et al. (2022), who evaluate the impact of fossil record biases, as well as taxonomic and phylogenetic issues, on the knowledge of the early evolution of ray-finned fishes;^[128] subsequently Henderson, Dunne & Giles (2022) use this database to study patterns of diversity of ray-finned fishes through the Paleozoic, taking the extent and impact of sampling biases into account.^[129]
A novel mode of fang accommodation, with teeth of the lower jaw inserting into fenestrae of the upper jaw, is reported in Brazilichthys macrognathus by Figueroa & Andrews (2022).^[130]
Redescription and a study on the affinities of Toyemia is published by Bakaev & Kogan (2022).^[131]
Redescription of the anatomy and a study on the affinities of Brachydegma caelatum is published by Argyriou, Giles & Friedman (2022).^[132]
Osteoderms providing evidence of presence of large sturgeons (within the upper size bracket for Acipenseridae) in early-middle Paleocene freshwater ecosystems of western North America are described from the Fort Union Formation (Montana, United States) by Brownstein (2022).^[133]
Fossil material of a member or a relative of the genus Eomesodon, representing the oldest record of pycnodonts from East Gondwana reported to date, is described from the Middle Jurassic (Bathonian) Jaisalmer Formation (Rajasthan, India) by Kumar et al. (2022).^[134]
A study on the tooth replacement pattern and implantation in Serrasalmimus secans is published by Matsui & Kimura (2022), who interpret their findings as indicating that serrasalmimid pycnodont fish independently acquired a vertical replacement in true thecodont implantation, i.e. a characteristic tooth replacement pattern of mammals.^[135]
A study on the phylogenetic relationships and evolutionary history of extant and extinct gars is published by Brownstein et al. (2022).^[136]
Redescription and a study on the affinities of Saurostomus esocinus is published by Cooper & Maxwell (2022), who interpret this taxon as the basalmost transitional member of the suspension-feeding clade of pachycormids.^[137]
A study on bone repair in response to damage in Leedsichthys problematicus is published by Johanson et al. (2022).^[138]
Redescription and a study on the affinities of Thaumaturus intermedius is published by Micklich & Arratia (2022).^[139]
Redescription of "Diplomystus" solignaci is published by Marramà, Khalloufi & Carnevale (2022), who interpret this fish as a paraclupeid ellimmichthyiform, and transfer it to the genus Paraclupea.^[140]
A study on cranial morphological features that diagnose known families of catfishes, and on their implications for the knowledge of the affinities of catfishes from the Paleogene of Africa, is published by Murray & Holmes (2022), who reassess the familial placement of the Paleogene African catfishes and assign Eomacrones wilsoni to the family Bagridae sensu stricto.^[141]
Description of new fossil material of Enchodus from the Cenomanian of Ukraine, and a revision of earlier records of Enchodus from Ukraine, is published by Kovalchuk, Barkaszi & Anfimova (2022).^[142]
Redescription and a study on the phylogenetic affinities of Protosyngnathus sumatrensis is published by Murray (2022).^[143]
A study on the phylogenetic affinities of fossil gobioids is published by Gierl et al. (2022).^[144]
New specimen of Mene rhombea with extensive soft tissue preservation and striking colour patterning is described from the Eocene (Ypresian) Monte Bolca Lagerstätte (Italy) by Rossi et al. (2022).^[145]
A study on patterns of body size evolution of tetraodontiforms in relation to paleoclimate events is published by Troyer et al. (2022).^[146]
Přikryl et al. (2022) describe a new specimen of Archaeotetraodon winterbottomi from the Oligocene Rybnytsia Member of the Menilite Series (Ukraine), providing new information on the anatomy of this tetraodontid.^[147]

Lobe-finned fishes

New lobe-finned fish taxa

Name	Novelty	Status	Authors	Age	Type locality	Notes
Ceratodus guanganensis^[148]	Sp. nov	Valid	Wang et al.	Late Jurassic	Shaximiao Formation	Announced in 2021; the final version of the article naming it was published in 2022.
Ceratodus shishkini^[149]	Sp. nov	Valid	Minikh	Triassic		Published online in 2023, but the issue date is listed as December 2022.
Dianodipterus^[150]	Gen. et sp. nov	Valid	Luo et al.	Devonian (Eifelian)	Qujing Formation	A lungfish. The type species is D. huizeensis.
Diplurus enigmaticus^[151]	Sp. nov		Brownstein & Bissell	Triassic		A coelacanth.
Langlieria smalingi^[152]	Sp. nov	Valid	Downs & Daeschler	Devonian (Frasnian)	Catskill Formation	A member of the family Tristichopteridae.
Libys callolepis^[153]	Sp. nov	Valid	Ferrante, Menkveld-Gfeller & Cavin	Early Jurassic (Toarcian)	Stadelgraben Formation	A coelacanth belonging to the family Latimeriidae.
Qikiqtania^[154]	Gen. et sp. nov	Valid	Stewart et al.	Devonian (Frasnian)	Fram Formation	An elpistostegalian. The type species is Q. wakei.
Rhizodus serpukhovensis^[155]	Sp. nov	Valid	Smirnova	Carboniferous (Serpukhovian)
Rinconodus^[156]	Gen. et sp. nov	Valid	Panzeri et al.	Late Cretaceous (Santonian)	Bajo de la Carpa Formation	A lungfish belonging to the family Ceratodontidae. The type species is R. salvadori.

Lobe-finned fish research

Review of the phylogenetic analyses of onychodont relationships, aiming to determine the sources of discrepancies in the different phylogenetic hypotheses, is published by Ciudad Real et al. (2022).^[157]
A study on the histology of the median fin bones and life history of Miguashaia bureaui is published by Mondéjar Fernandez et al. (2022).^[158]
Toriño et al. (2022) describe a large mawsoniid coelacanth from the Upper Jurassic Kimmeridge Clay (United Kingdom), interpret its morphology as unexpectedly similar to the morphology of Mawsonia, and consider the studied coelacanth to be either an unknown Mawsonia-like form or a member of the lineage of Trachymetopon with some morphological characters previously assumed as diagnostic for Mawsonia.^[159]
Description of cranial endocasts of six Paleozoic lungfish (Iowadipterus halli, Gogodipterus paddyensis, Pillararhynchus longi, Griphognathus whitei, Orlovichthys limnatis, Rhinodipterus ulrichi), and a study on the evolution of crania, brains and sensory abilities of lungfish, is published by Clement et al. (2022).^[160]
Description of two well-preserved specimens of Youngolepis praecursor from the Devonian Xitun Formation (China), and a study on the implications of these specimens for the knowledge of the evolution of the specialized lungfish feeding mechanism, is published by Cui et al. (2022).^[161]
A study on the anatomy of the neurocrania of Scaumenacia curta and Pentlandia macroptera is published by Boirot, Challands & Cloutier (2022), who report that the neurocranium of P. macroptera was at least partially ossified, while S. curta had a cartilaginous neurocranium, and evaluate the implications of their findings for the knowledge of paedomorphosis in lungfish evolution.^[162]
A study on the histology of the tooth plates of Metaceratodus baibianorum from the Upper Cretaceous La Colonia Formation (Argentina) is published by Panzeri, Pereyra & Cione (2022).^[163]
A study on the anatomy and affinities of Palaeospondylus gunni is published by Hirasawa et al. (2022), who interpret this taxon as a sarcopterygian, and likely a stem-tetrapod;^[164] their conclusions are subsequently contested by Brownstein (2023).^[165] ^[166]

General research

A study on the evolution of swimming speed in early vertebrates, inferred from caudal fin morphology of Paleozoic cyclostomes (Myxinidae and Petromyzontidae), jawless stem gnathostomes (Conodonta, Anaspida, Pteraspidomorphi, Thelodonti and Osteostraci) and placoderms, is published by Ferrón & Donoghue (2022), who interpret their findings as indicating that microsquamous taxa (thelodonts and anaspids) had higher swimming capabilities than vertebrates with rigid bony carapaces (including placoderms), that demonstrating that the rise of active nektonic vertebrates long-predated the Devonian.^[168]
A study on the morphological similarities of Silurian and Devonian jawless and jawed vertebrates, aiming to determine which groups were most and least likely to have competed (and whether competition with jawed vertebrates was likely to cause the extinction of the majority of jawless vertebrates), is published by Scott & Anderson (2022), who don't find support for overall competitive exclusion of jawless vertebrates by jawed vertebrates.^[169]
A study on the evolution of the vertebrate spiracular region from jawless vertebrates to tetrapods is published by Gai et al. (2022).^[170]
A study on the mandibular morphology of Silurian and Devonian jawed vertebrates, and on the functional capabilities of their jaws, is published by Deakin et al. (2022).^[171]
Description of the ichthyolith assemblage from the Upper Triassic Luning Formation (Nevada, United States), increasing known diversity of marine vertebrates in the western United States in the Late Triassic from four to at least 14 genera, is published by Tackett, Zierer & Clement (2022), who report evidence of the presence of taxa that were previously known only from Europe during the Late Triassic.^[172]
Revision of the marine fish fauna from the Upper Cretaceous (Campanian) Rybushka Formation (Saratov Oblast, Russia) is published by Ebersole et al. (2022).^[173]
A study aiming to reconstruct the fish community and oceanographic conditions off the coast of Peru during the last interglacial, based on data from sediments from the northern Humboldt Current system, is published by Salvatteci et al. (2022).^[174]
Review of the fossil material providing information on the reproduction of extinct fishes is published by Capasso (2022), who names new ootaxa Theutonicootheca primigenia (possible egg capsule of jawless vertebrates or placoderms from the Emsian Kaub Formation, Germany), Beargulchootheca carbonifera (possible egg capsule of cartilaginous fishes from the Mississippian Bear Gulch Limestone of the Heath Formation, Montana, United States), Palaeochimaerootheca browni (egg capsule of chimaerids from the Pennsylvanian Cherokee Shale, Missouri, and Mazon Creek fossil beds, Illinois, United States), and Parascylliootheca libanica (egg capsule of parascylliids from the Cretaceous Sannine Formation, Lebanon).^[175]

Notes and References

Thorsteinsson . R. . Elliott . D. K. . Silurian and Devonian Heterostraci (Vertebrata) of the Canadian Arctic Archipelago . 2022 . Palaeontographica Canadiana . 40 . 1–348 . 978-1-897095-94-2 .
Shan . X. . Gai . Z. . Lin . X. . Chen . Y. . Zhu . M. . Zhao . W. . 2022 . The oldest eugaleaspiform fishes from the Silurian red beds in Jiangxi, South China and their stratigraphic significance . Journal of Asian Earth Sciences . 229 . Article 105187 . 10.1016/j.jseaes.2022.105187 . 2022JAESc.22905187S . 247493604 .
Brennan . J. M. . Two New Venezuelan Chiggers (Acarina: Trombiculidae) . 1952 . The Journal of Parasitology . 38 . 2 . 143–146 . 10.2307/3273833 . 3273833 . 14946627 .
Shan . X. . Zhao . W. . Gai . Z. . 2022 . A New Species of Jiangxialepis (Galeaspida) from the Lower Telychian (Silurian) of Jiangxi and its Biostratigraphic Significance . Acta Geologica Sinica (English Edition) . 97 . 2 . 393–403 . 10.1111/1755-6724.15009 . 252813209 .
Gai . Z. . Li . Q. . Ferrón . H. G. . Keating . J. N. . Wang . J. . Donoghue . P. C. J. . Zhu . M. . 2022 . Galeaspid anatomy and the origin of vertebrate paired appendages . Nature . 609 . 7929 . 959–963 . 10.1038/s41586-022-04897-6 . 36171376 . 2022Natur.609..959G . 1983/39f23cba-4a2b-4d8f-92fe-dbfc89869c26 . 252569951 .
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