Caseodus

Caseodus is an extinct genus of eugeneodontid holocephalian from the Carboniferous of the United States (Illinois, Indiana, Kansas, South Dakota) and the Early Triassic of Canada (British Columbia).^[2] It was of medium size, measuring 1–1.5 m (3.3–4.9 ft) in length.^[3][4]

Caseodus Temporal range: Carboniferous - Early Triassic 355–247.2 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Holocephali
Order:	†Eugeneodontida
Family:	†Caseodontidae
Genus:	†Caseodus Zangerl, 1981
Species[1]
†C. basalis Cope, 1894 †C. eatoni Zangerl, 1981 †C. varidentis Mutter & Neumann, 2008

Eugeneodontida are an extinct order of Chondrichthyes. They are characterized by the presence of tooth whorls. They include iconic genera, such as Helicoprion ("buzz-saw shark"), Ornithoprion, Edestus or Fadenia. Caseodus is one of the few eugeneodontid genera that survived the end-Permian mass extinction event. It is one of the last surviving genera of this clade.^[4]

Caseodus is named after the late paleoichthyologist Gerard Case.^[5]