Triodus

Triodus Temporal range: Late Carboniferous–Middle Permian 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. richterae

Restoration of T. sesselensis

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.^[1]

References

1. 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.

Further reading

• The Rise of Fishes: 500 Million Years of Evolution by John A. Long