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Prosopium is a
genusIn biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of
freshwater whitefishThe freshwater whitefish are fish of the subfamily Coregoninae in the salmon family Salmonidae. Along with the freshwater whitefish, the Salmonidae includes the freshwater and anadromous trout and salmon species as well as graylings...
es found in
North AmericaNorth America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
and parts of eastern
RussiaRussia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
. It contains three fairly widespread species: the
round whitefishThe round whitefish is a freshwater species of fish that is found in lakes from Alaska to New England, including the Great Lakes. It has an olive-brown back with light silvery sides and underside and its size is generally between 9 and 19 inches long...
, the
pygmy whitefishThe pygmy whitefish, Prosopium coulterii, is a freshwater whitefish of the genus Prosopium in the family Salmonidae. Found in the mountain streams and lakes west of North America, it also has isolated populations in Lake Superior and in Ekityki Lake, Chukchi Peninsula.- Description :The pygmy...
, and the
mountain whitefishThe mountain whitefish is one of the most widely distributed salmonid fish of western North America. It is found from the Mackenzie River drainage in Northwest Territory, Canada south through western Canada and the northwestern USA in the Pacific, Hudson Bay and upper Missouri River basins to the...
. The remaining species, the
Bonneville ciscoThe Bonneville cisco is a species of cisco endemic to Bear Lake along the Utah-Idaho border, USA. It is one of three species of whitefish endemic to Bear Lake, the others being the Bear Lake whitefish and the Bonneville whitefish....
, the
Bonneville whitefishThe Bonneville whitefish is a salmonid fish endemic to Bear Lake on the Utah-Idaho border. It is one of three species of Prosopium endemic to Bear Lake, the other two being the Bear Lake whitefish and the Bonneville cisco...
, and the
Bear Lake whitefishThe Bear Lake whitefish Prosopium abyssicola is a salmonid fish endemic to Bear Lake on the Utah-Idaho border. It is one of three species of Prosopium endemic to Bear Lake, the other two being the Bonneville whitefish and the Bonneville cisco. The species is listed as a Wildlife Species of Concern...
are endemic to Bear Lake.