New cartilaginous fish taxa Cartilaginous fish research • A study aiming to quantify the completeness of the acanthodian fossil record is published by Schnetz
et al. (2022). • 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). • 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. • 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). • 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). • 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. • 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) • 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). • 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). • 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. • 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. • 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. • 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). • 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). • 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), is published by Sternes, Wood & Shimada (2022). • 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. • 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. • 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). • 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. • 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. • 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. • Greenfield, Delsate & Candoni (2022) coin a new name
Toarcibatidae for the family of
Toarcian batomorphs previously referred to as Archaeobatidae. • A study on the microstructure of rostral denticles of
Ischyrhiza mira is published by Cook
et al. (2022) • 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. • A study on the phylogenetic relationships of extant and fossil rays and skates is published by Villalobos-Segura
et al. (2022). • 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). • 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. • Fossil material of a diverse shark and ray fauna is reported from the early Pleistocene of
Taiwan by Lin, Lin & Shimada (2022). ==Ray-finned fishes==