Triodus

Triodus; Temporal range: Late Carboniferous–Middle Permian PreꞒ Ꞓ O S D C P T J K Pg N
	Fossil
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	†Xenacanthiformes
Family:	†Xenacanthidae
Genus:	†Triodus; Jordan, 1849
Species
	T. elpia; T. richterae;

Triodus is an extinct genus of xenacanthiform cartilaginous fish that lived from the Carboniferous to the Permian. In 2017, a new species Triodus richterae was described from the Rio do Rasto Formation of Brazil.

References

↑ 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. Bibcode:2017JSAES..80..482P. doi:10.1016/j.jsames.2017.09.007.