Percopsiformes

Percopsiformes Temporal range: Eocene–Recent PreЄ Є O S D C P T J K Pg N ^[1]

Amblyopsis spelaeus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Percopsiformes L. S. Berg, 1940
Families
Amblyopsidae (cavefishes) Aphredoderidae (pirate perch) Percopsidae (trout-perches)

The Percopsiformes are a small order of ray-finned fishes, comprising the trout-perch and its allies. It contains just ten extant species, grouped into seven genera and three families. Five of these genera are monotypic^[2]

They are generally small fish, ranging from 5 to 20 cm (2.0 to 7.9 in) in adult body length. They inhabit freshwater habitats in North America. They are grouped together because of technical characteristics of their internal anatomy, and the different species may appear quite different externally.^[1]

References

1 2 Cohen, Daniel M. (1998). Paxton, J.R. & Eschmeyer, W.N., ed. Encyclopedia of Fishes. San Diego: Academic Press. p. 129. ISBN 0-12-547665-5.
↑ Froese, Rainer, and Daniel Pauly, eds. (2008). "Amblyopsiformes" in FishBase. December 2008 version.

Extant Actinopterygii orders by subclass

Kingdom Animalia
Phylum Chordata
Subphylum Vertebrata
Infraphylum Gnathostomata
Superclass Osteichthyes

Cladistii

Polypteriformes

Actinopteri

Chondrostei

Acipenseriformes

Neopterygii

Holostei

Teleostei

Elopomorpha	Elopiformes Albuliformes Notacanthiformes Anguilliformes

Osteoglossomorpha	Osteoglossiformes Hiodontiformes

Otomorpha	Clupeiformes Alepocephaliformes Gonorynchiformes Cypriniformes Characiformes Gymnotiformes Siluriformes

Lepidogalaxii	Lepidogalaxiiformes

Protacanthopterygii	Argentiniformes Galaxiiformes Salmoniformes Esociformes

Stomiati	Osmeriformes Stomiiformes

incertae sedis	Ateleopodiformes Aulopiformes Myctophiformes Lampriformes Polymixiiformes

Paracanthopterygii	Percopsiformes Zeiformes Stylephoriformes Gadiformes

Acanthopterygii	Beryciformes Holocentriformes Ophidiiformes Batrachoidiformes Kurtiformes Gobiiformes Syngnathiformes Scombriformes Synbranchiformes Anabantiformes Istiophoriformes Carangiformes Pleuronectiformes Pholidichthyiformes Cichliformes Atheriniformes Cyprinodontiformes Beloniformes Mugiliformes Blenniiformes Labriformes Ephippiformes Lobotiformes Acanthuriformes Chaetodontiformes Spariformes Lophiiformes Tetraodontiformes Uranoscopiformes Pempheriformes Centrarchiformes Perciformes

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