Heterodontiformes
Heterodontiformes Temporal range:
| |
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Heterodontus japonicus | |
Paracestracion danieli | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Chondrichthyes |
Subclass: | Elasmobranchii |
Subdivision: | Selachimorpha |
Superorder: | Galeomorphii |
Order: | Heterodontiformes L. S. Berg, 1940 |
Genera | |
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Heterodontiformes is an order of sharks in the superorder Galeomorphii. It includes the bullhead sharks (genus Heterodontus), and several extinct genera. The earliest known members of the group are from the Early Jurassic (Toarcian), around 175 million years ago. Several extinct genera are known from the Jurassic, with all except Paracestracion only known from isolated teeth. The oldest known members of the modern genus appeared during the Late Jurassic.[1]
References[edit]
- ^ Slater, Tiffany S.; Ashbrook, Kate; Kriwet, Jürgen (August 2020). Cavin, Lionel (ed.). "Evolutionary relationships among bullhead sharks (Chondrichthyes, Heterodontiformes)". Papers in Palaeontology. 6 (3): 425–437. Bibcode:2020PPal....6..425S. doi:10.1002/spp2.1299. hdl:10468/10339. ISSN 2056-2799. S2CID 214133104.