Caseodus Explained

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).^[1] It was of medium size, measuring 1- in length.^{[2] [3]}

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.^[3]

Caseodus is named after the late paleoichthyologist Gerard Case.^[4]

Notes and References

1. Web site: Fossilworks: Caseodus.
2. Lionel Calvin, Allison (2008) Fishes and the breakup of Pangea p. 12
3. Mutter R.J., Neuman A.G. (2008): New eugeneodontid sharks from the Lower Triassic Sulphur Mountain Formation of Western Canada. In: Fishes and the Break-up of Pangaea. Cavin L, Longbottom A, Richter M, editors. Geol Soc London Spec Publ 295: 941
4. Book: R., Zangerl . Handbook of paleoichthyology . 3A. Chondrichthyes I (Paleozoic elasmobranchii) . 1981 . Gustav Fischer . 3-437-30337-6 . 1116152115.