Triodus

Triodus Temporal range: Ma PreꞒ Ꞓ O S D C P T J K Pg N
Fossil
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 fish that lived from the Carboniferous to the Triassic. It was a freshwater fish, and fossils have been found in the Chinle Formation and Black Prince Limestone of Arizona, the Petrified Forest Member 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