Eurynotoides

Eurynotoides Temporal range: 272.3–265 Ma PreꞒ Ꞓ O S D C P T J K Pg N Permian
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	†Eurynotoidiformes
Family:	†Eurynotoididae
Genus:	†Eurynotoides Berg, 1940
Species
†Eurynotoides costatus Eichwald, 1861 †Eurynotoides multa Sergienko, 1974 †Eurynotoides nanus Eichwald, 1861
Synonyms
Heterolepis Sergienko, 1974

Eurynotoides is an extinct genus of prehistoric bony fish^[1] in the family Eurynotoididae of the order Eurynotoidiformes.^[2]

Taxonomy

The genus was erected by Berg in 1940. In 1974, Sergienko described a new genus and species Heterolepis multa from the Middle Permian (Kazanian) of Kemerovo Region, Russia, as a new member of the Palaeoniscidae family. However, Heterolepis was already in use for the extant snake Heterolepis capensis (Smith, 1847), making Sergienko's naming a junior homonym. In 2023, A. S. Bakaev redescribed "Heterolepis" multa as a new species in the genus Eurynotoides, E. multa. This species is different from E. nanus and E. costatus by having ganoin peninsula-shaped structures on the anterior margin of the scale as well as by the presence of denticles on both posterior and lower edge of the scale.^[2]

See also

• Prehistoric fish
• List of prehistoric bony fish

References

1. Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 364: 560. Archived from the original on July 23, 2011. Retrieved 2009-02-27.
2. A. S. Bakaev (2023). "Revision of Permian Ray-Finned Fishes from the Kazankovo-Markino Formation of the Kuznetsk Basin". Paleontological Journal. 57 (3): 335-342. doi:10.1134/S0031030123030036. Archived from the original on July 8, 2023.

External links

• "Eurynotoides". Paleobiology Database. Retrieved 2024-02-22.