Keasius

Keasius
Temporal range: 41.2–11.63 Ma Middle Eocene–Middle Miocene
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Order: Lamniformes
Family: Cetorhinidae
Genus: †Keasius
Welton, 2013[1]
Type species
†Keasius taylori
Welton, 2013
Other species
  • †Keasius parvus
    (Leriche, 1908)[2]
  • †Keasius septemtrionalis
    Reinecke, von der Hocht, & Dufraing, 2015[3]
  • †Keasius rhenanus
    Reinecke, von der Hocht, & Dufraing, 2015
Synonyms
Genus synonymy
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]

  1. ^ 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.
  2. ^ 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.
  3. ^ 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.
  4. ^ 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.