Protacanthopterygii

Protacanthopterygii
Ayu (Plecoglossus altivelis: Osmeriformes)
in Kawasaki (Kanagawa Prefecture, Japan)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Cohort: Euteleostei
Superorder: Protacanthopterygii
Orders

Argentiniformes
Esociformes
Galaxiiformes
Salmoniformes
Osmeriformes?
Stomiiformes?
Ateleopodiformes?
Alepocephaliformes?
Myctophiformes?
Aulopiformes?
Lepidogalaxiiformes?

Protacanthopterygii is a superorder of ray-finned fish. They inhabit both marine and freshwater habitats. They appear to have evolved in the Cretaceous or perhaps late Jurassic, originating probably roughly 150 million years ago; fossils of them and the closely related Otocephala are known from throughout the Cretaceous.[1]

  1. ^ Encyclopædia Britannica Online (2009): Annotated classification – Superorder Protacanthopterygii. In: Fish. Version of 2009-APR-22. Retrieved 2009-SEP-28.