Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Euteleosteomorpha
Subcohors: Neoteleostei
Infracohors: Eurypterygia
Sectio: Ctenosquamata
Subsectio: Acanthomorphata
Divisio/Superordo: Paracanthopterygii
Series: Percopsaria
Ordo: Percopsiformes
Familiae: Percopsidae - Aphredoderidae - Amblyopsidae
Name
Percopsiformes Berg, 1937
References
Nelson, J.S. 2006. Fishes of the World, fourth edition. John Wiley, Hoboken, 624 pp. ISBN 0-471-25031-7. ISBN 978-0-471-25031-9. Reference page.
Percopsiformes in FishBase,
Froese, R. & Pauly, D. (eds.) 2024. FishBase. World Wide Web electronic publication, www.fishbase.org, version 02/2024.
Percopsiformes – Taxon details on Integrated Taxonomic Information System (ITIS).
Betancur-R., R., Wiley, E.O., Arratia, G., Acero P., A., Bailly, N., Miya, M., Lecointre, G. & Ortí, G. 2017. Phylogenetic classification of bony fishes. BMC Evolutionary Biology 17(1): 162. DOI: 10.1186/s12862-017-0958-3 Open access. Reference page.
Vernacular names
日本語: サケスズキ目
polski: okonkokształtne
The Percopsiformes /pɜːrˈkɒpsɪfɔːrmiːz/ are a small order of freshwater teleost fishes measuring less than 20 cm in length, comprising the trout-perch and its allies.[2]: 319 It contains just ten extant species, grouped into seven genera and three families. Five of these genera are monotypic.[3]
They inhabit freshwater habitats in North America, and fossil evidence indicates that they have inhabited this region since the Late Cretaceous, with both suborders having diverged by the Maastrichtian.[4][1] Most species in this order are known from the eastern and central regions of North America, although the two Percopsis species have a primarily boreal and western distribution, with P. omiscomaycus reaching as far north as the Arctic Circle and P. transmontana being restricted to the Pacific Northwest.
They are generally small fish, ranging from 5 to 20 cm (2.0 to 7.9 in) in adult body length. They are grouped together because of technical characteristics of their internal anatomy, and the different species may appear quite different externally.[5] Despite their scientific name and the common names for some taxa, they are not closely related to actual perches in the order Perciformes, and rather represent a freshwater lineage of the otherwise almost entirely marine superorder Paracanthopterygii. They are more closely related to the cods, dories, and the deep-sea tube-eye, and fossil evidence suggests that their closest relative was the extinct order Sphenocephaliformes, comprising two enigmatic genera of Late Cretaceous marine fish, as well as Omosomopsis, another Cretaceous marine fish from Morocco.[4]
Classification
Order Percopsiformes Berg 1937[6][7]: 72
Genus †Lateopisciculus Murray & Wilson 1996
Genus †Percopsiformorum [Otolith][citation needed]
Suborder Percopsoidei Berg 1937
Genus †Lindoeichthys (Late Cretaceous of Canada)[1]
Family Percopsidae Regan 1911 [Percopsides Agassiz 1850; Erismatopteridae Jordan 1905 †Libotoniidae Grande, 1988[8]]
Genus †Amphiplaga Cope 1877
Genus †Erismatopterus Cope 1870
Genus †Libotonius Wilson 1977
Genus †Massamorichthys Murray 1996
Genus Percopsis Agassiz 1849 [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 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] (Spring cavefish)
Genus Chologaster Agassiz 1853 (Swampfish)
Genus Amblyopsis de Kay 1842 [Troglichthys Eigenmann 1899; Poecilosomus Swainson 1839]
References
Alison M. Murray; Donald B. Brinkman; Michael G. Newbrey; Andrew G. Neuman (2019). "Earliest North American articulated freshwater acanthomorph fish (Teleostei: Percopsiformes) from Upper Cretaceous deposits of Alberta, Canada". Geological Magazine. 157 (7): 1087–1096. doi:10.1017/S0016756819001328. S2CID 212927875.
Facey, Douglas E.; Bowen, Brian W.; Collette, Bruce B.; Helfman, Gene S. (2023). The Diversity of Fishes: Biology, Evolution and Ecology (Third ed.). Wiley. ISBN 9781119341918.
Froese, Rainer, and Daniel Pauly, eds. (2008). "Amblyopsiformes" in FishBase. December 2008 version.
Near, Thomas J; Thacker, Christine E (18 April 2024). "Phylogenetic classification of living and fossil ray-finned fishes (Actinopterygii)". Bulletin of the Peabody Museum of Natural History. 65. doi:10.3374/014.065.0101.
Cohen, Daniel M. (1998). Paxton, J.R.; Eschmeyer, W.N. (eds.). Encyclopedia of Fishes. San Diego: Academic Press. p. 129. ISBN 0-12-547665-5.
Nelson, Joseph S.; Grande, Terry C.; Wilson, Mark V. H. (2016). Fishes of the World (5th ed.). John Wiley & Sons. ISBN 9781118342336.
van der Laan, Richard (2018). "Family-group names of fossil fishes". European Journal of Taxonomy. 466: 1–167. doi:10.5852/ejt.2018.466.
Murray, A.M.; Brinkman, D.B.; Newbrey, M.G.; Neuman, A.G. (2020). "Earliest North American articulated freshwater acanthomorph fish (Teleostei: Percopsiformes) from Upper Cretaceous deposits of Alberta, Canada". Geological Magazine. 157 (7): 1087–1096. doi:10.1017/S0016756819001328.
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