Keasius

Keasius; Temporal range: 41.2–11.63 Ma Middle Eocene–Middle Miocene PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	Lamniformes
Family:	Cetorhinidae
Genus:	†Keasius; Welton, 2013
Type species
	†Keasius taylori; Welton, 2013
Other species
	†Keasius parvus ; (Leriche, 1908); †Keasius septemtrionalis ; Reinecke, von der Hocht, & Dufraing, 2015; †Keasius rhenanus ; Reinecke, von der Hocht, & Dufraing, 2015;
Synonyms
	Genus synonymy "Praecetorhinus" ; von der Hocht, 1978 (nomen nudum); ; Species synonymy K. parvus Cetorhinus parvus ; Leriche, 1908; ; ;

Keasius is an extinct genus of basking sharks that lived during the Cenozoic. It contains four valid species, which have been found in North America, Europe, and Antarctica.^[1]^[3]

References

^ ^a ^b Welton, B.J. (2013). "A new archaic basking shark (Lamniformes: Cetorhinidae) from the late Eocene of western Oregon, U.S.A., and description of the dentition, gill rakers and vertebrae of the recent basking shark Cetorhinus maximus (Gunnerus)". New Mexico Museum of Natural History and Science Bulletin. 58: 1–48.
^ Leriche, M. (1908). "Sur un appareil fanonculaire de Cetorhinus trouvé à l'état fossile dans le Pliocène d'Anvers". Comptes rendus hebdomadaires des séances de l'Académie des sciences. 146 (16): 875–878.
^ ^a ^b Reinecke, T.; von der Hocht, F.; Dufraing, L. (2015). "Fossil basking shark of the genus Keasius (Lamniforme, Cetorhinidae) from the boreal North Sea Basin and Upper Rhine Graben: evolution of dental characteristics from the Oligocene to late Middle Miocene and description of two new species". Palaeontos. 28: 39–98.
^ von der Hocht, F. (1978). "Bestandsaufnahme der Chondrichthyes-Fauna des unteren Meeressandes (Oligozän, Rupelium) in Mainzer Becken". Mededelingen van de Werkgroep voor Tertiaire en Kwartaire Geologie. 15 (3): 77–83.

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