The Percopsiformes are a small order of
ray-finned fishes
Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species.
The ray-finned fishes are so called because their fins are webs of skin supported by bony or hor ...
, comprising the
trout-perch and its allies. It contains just ten
extant species, grouped into seven
genera and three
families
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Ideal ...
. Five of these genera are
monotypic
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispe ...
They are generally small fish, ranging from 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.
* Order Percopsiformes
Berg 1937
** Genus †''
Lateopisciculus''
Murray & Wilson1996
** Genus †''
Percopsiformorum''
tolith** Suborder Percopsoidei
Berg 1937
*** Family †
Libotoniidae Wilson & Williams 1992
**** Genus †''
Libotonius''
Wilson 1977
*** Family
Percopsidae Regan 1911 ercopsides Agassiz 1850; Erismatopteridae Jordan 1905**** Genus †''
Massamorichthys''
Murray 1996
**** Genus †''
Amphiplaga''
Cope 1877
**** Genus †''
Erismatopterus''
Cope 1870
**** Genus ''
Percopsis''
Agassiz 1849 Columbia''_
Eigenmann_&_Eigenmann_1892_non_Rang_1834;_''Columatilla.html" ;"title="Columbia_(fish).html" ;"title="'Columbia (fish)">Columbia''
Eigenmann & Eigenmann 1892 non Rang 1834; ''Columatilla">Columbia_(fish).html" ;"title="'Columbia (fish)">Columbia''
Eigenmann & Eigenmann 1892 non Rang 1834; ''Columatilla''
Whitley 1940; ''Salmoperca''
Thompson 1850]
** Suborder Aphredoderoidei
Berg 1937 [Amblyopsoidei
Regan 1911; Aphredoderoidea; Amblyopsoidea]
*** Family Aphredoderidae
Bonaparte 1832 (Pirate perches)
**** Genus †''
Trichophanes''
Cope 1872
**** Genus ''
Aphredoderus''
Lesueur 1833 ex Cuvier & Valenciennes 1833 'Sternotremia''_
Nelson_1876;_''Asternotremia.html" ;"title="Sternotremia.html" ;"title="'Sternotremia">'Sternotremia''
Nelson 1876; ''Asternotremia">Sternotremia.html" ;"title="'Sternotremia">'Sternotremia''
Nelson 1876; ''Asternotremia''
Nelson ex Jordan 1877; ''Scolopsis''
Gilliams 1824 non Cuvier 1814]
*** Family Amblyopsidae
Bonaparte 1832 [Hypsaeidae
Storer 1846] (Cavefishes)
**** Genus ''Typhlichthys''
Girard 1859 (Southern cavefish)
**** Genus ''
Speoplatyrhinus''
Cooper & Kuehne 1974 (Alabama cavefish)
**** Genus ''
Forbesichthys''
Jordan 1929 'Forbesella''_
Jordan_&_Evermann_1927_non_Herdman_1891_non_Lacaze-Duthiers_&_Delage_1892.html" ;"title="Forbesella.html" ;"title="'Forbesella">'Forbesella''
Jordan & Evermann 1927 non Herdman 1891 non Lacaze-Duthiers & Delage 1892">Forbesella.html" ;"title="'Forbesella">'Forbesella''
Jordan & Evermann 1927 non Herdman 1891 non Lacaze-Duthiers & Delage 1892(Spring cavefish)
**** Genus ''Chologaster''
Agassiz 1853 (Swampfish)
**** Genus ''Amblyopsis''
de Kay 1842 [''Troglichthys''
Eigenmann 1899; ''Poecilosomus''
Swainson 1839]
References
{{Taxonbar, from=Q3899690
Percopsiformes,
Taxa named by Lev Berg
Extant Campanian first appearances
Ray-finned fish orders