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Percopsiformes
The Percopsiformes are a small order of freshwater teleost fishes measuring less than 20 cm in length, comprising the trout-perch and its allies. It contains just ten extant taxon, extant species, grouped into seven genus, genera and three family (biology), families. Five of these genera are monotypic. 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. 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 in adult body length. They are grouped together because of technical characteristics of their internal anatomy, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Percopsidae
Percopsidae is a family of fish in the order Percopsiformes, with one extant genus with two species, both endemic to North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ..., and five described fossil genera. They are small fish with weak fin spines, and an adipose fin similar to those of trout. They feed on insects and small crustaceans. References Trout-perch article by Robert G. Bramblett Per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erismatopterus
''Erismatopterus'' is an extinct genus of percopsiform fish which lived during the early to middle Eocene epoch and containing the single species ''Erismatopterus levatus''. A report of the genus in sediments of similar age in Washington State have been discredited. ''Erismatopterus'' is treated as part of the family Percopsidae, but formerly was the type genus of the extinct family Erismatopteridae. The genus is closely related to '' Amphiplaga'' of related lake sediments. Shoaling behavior has been reported from a mass mortality fossil of ''E. levatus'' and attributed as a predator-evasion response behavior. Distribution ''Erismatopterus levatus'' is known from solitary fossils and mass mortality groups which are compression-impression fossils preserved in layers of soft sedimentary rock. Along with other well preserved fish fossils, the ''E. levatus'' specimens are found in several outcrops of the Early to Middle Eocene Green River Formations Lake Gosiute and Lake Uinta. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amblyopsidae
The Amblyopsidae are a fish family commonly referred to as cavefish, blindfish, or swampfish. They are small freshwater fish found in the dark environments of caves (underground lakes, pools, rivers and streams), springs and swamps in the eastern half of the United States. Like other troglobites, most amblyopsids exhibit adaptations to these dark environments, including the lack of functional eyes and the absence of pigmentation. More than 200 species of cavefishes are known,Riesch, R.; Tobler, M.; and Plath, M. (2015). ''Extremophile Fishes: Ecology, Evolution, and Physiology of Teleosts in Extreme Environments.'' but only six of these are in the family Amblyopsidae.Romero, A., editor (2001). ''The Biology of Hypogean Fishes.'' Developments in Environmental Biology of Fishes. One of these, '' Forbesichthys agassizii'', spends time both underground and aboveground. A seventh species in this family, '' Chologaster cornuta'', is not a cave-dweller but lives in aboveground swamps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paracanthopterygii
Paracanthopterygii is a superorder of fishes. Members of this group are called paracanthopterygians. The oldest members are known as fossils from the Cenomanian. It includes five orders: * † Sphenocephaliformes * Percopsiformes ( trout-perches & allies) * Zeiformes ( dories) * Stylephoriformes ( Tube-eyes) * Gadiformes (cod Cod (: cod) is the common name for the demersal fish genus ''Gadus'', belonging to the family (biology), family Gadidae. Cod is also used as part of the common name for a number of other fish species, and one species that belongs to genus ''Gad ...s & allies) References Fish superorders {{Paracanthopterygii-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teleost
Teleostei (; Ancient Greek, Greek ''teleios'' "complete" + ''osteon'' "bone"), members of which are known as teleosts (), is, by far, the largest group of ray-finned fishes (class Actinopterygii), with 96% of all neontology, extant species of fish. The Teleostei, which is variously considered a Division (zoology), division or an infraclass in different taxonomic systems, include over 26,000 species that are arranged in about 40 order (biology), orders and 448 family (biology), families. Teleosts range from giant oarfish measuring or more, and ocean sunfish weighing over , to the minute male anglerfish ''Photocorynus spiniceps'', just long. Including not only torpedo-shaped fish built for speed, teleosts can be flattened vertically or horizontally, be elongated cylinders or take specialised shapes as in anglerfish and seahorses. The difference between teleosts and other bony fish lies mainly in their jaw bones; teleosts have a movable premaxilla and corresponding modifications ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trout-perch
''Percopsis omiscomaycus'', also known as the trout-perch, the grounder or the sand minnow, is one of two species in the family Percopsidae. Its name comes from the Greek root words ''perc'', meaning perch and ''opsi'' meaning appearance. The species name ''omiscomaycus'' is thought to be derived from a Native American word meaning ''trout''. These are freshwater fish that prefer clear to slightly turbid water, and are found in rivers and lakes throughout North America.Bosanko, Dave (2007), "Fish of Minnesota – Field Guide", pp. 162–163, Adventure Publication, Cambridge, MN. They are a generally small fish found in deep waters by day, but which migrate to shallower waters at night.They are most often seen washed up on beaches and are rarely seen alive or correctly identified. The trout-perch possess characteristics similar to both the trout and the perch.Bramblett, Robert, "Montana Cooperative Fishery Research Unit", Department of Ecology, Montana State University-Bozem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
