Triodus

Triodus; Temporal range: Carboniferous-Triassic; ~318.1–212.1 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Triodus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	†Xenacanthida
Family:	†Xenacanthidae
Genus:	†Triodus; Jordan, 1849
Species
	T. elpia; T. moorei; T. richterae;

Triodus is an extinct genus of xenacanthidan shark that lived from the Carboniferous to the Triassic. It was a freshwater shark, and fossils have been found in the Chinle Formation and Black Prince Limestone of Arizona, the Petrified Forest Formation of New Mexico and the Tecovas Formation of Texas, United States.^[1] In 2017, a new species Triodus richterae was described from the Rio do Rasto Formation of Brazil.^[2]

References

^ Triodus at Fossilworks.org
^ Victor E. Pauliv; Agustín G. Martinelli; Heitor Francischini; Paula Dentzien-Dias; Marina B. Soares; Cesar L. Schultz; Ana M. Ribeiro (2017). "The first Western Gondwanan species of Triodus Jordan 1849: A new Xenacanthiformes (Chondrichthyes) from the late Paleozoic of Southern Brazil". Journal of South American Earth Sciences. 80: 482–493. doi:10.1016/j.jsames.2017.09.007.