Eugeneodontida

Eugeneodontida Temporal range: 360–199.6 Ma PreЄ Є O S D C P T J K Pg N Early Carboniferous to Early Jurassic
Helicoprion bessonovi
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Superorder:	Selachimorpha
Order:	†Eugeneodontida Zangerl, 1981
Superfamilies and Families
see text

Eugeneodontida is an extinct and poorly known order of bizarre sharks. They possessed a unique "tooth-whorl" on the symphysis of the lower jaw as well as pectoral fins supported by long radials. The palatoquadrate was either fused to the skull or reduced. It is possible that they may belong to Holocephali.

Taxonomy

• Superfamily Caseodontoidea
  • Genus Campodus
  • Genus Chiastodus
  • Family Caseodontidae
    • Genus Caseodus
    • Genus Erikodus
    • Genus Fadenia
    • Genus Ornithoprion
    • Genus Romerodus
  • Family Eugeneodontidae
    • Genus Bobbodus
    • Genus Eugeneodus
    • Genus Gilliodus
• Superfamily Edestoidea
  • Family Agassizodontidae
    • Genus Agassizodus
    • Genus Arpagodus
    • Genus Campyloprion
    • Genus Helicoprion
    • Genus Parahelicoprion
    • Genus Sarcoprion
    • Genus Toxoprion
  • Family Edestidae
    • Genus Edestus
    • Genus Helicampodus
    • Genus Listracanthus
    • Genus Lestrodus
    • Genus Metaxyacanthus
    • Genus Parahelicampodus
    • Genus Physonemus
    • Genus Prospiraxis
    • Genus Syntomodus

External links

• Palaeos Vertebrates 70.100 Chondrichthyes: Eugnathostomata at paleos.com
• JSTOR: Journal of PaleontologyVol. 70, No. 1 (Jan., 1996), pp. 162-165
• More about Chondrichthyes at Devonian Times