Prosopium is a genus of freshwater whitefishes found in North America and parts of eastern Russia. It contains three fairly widespread species: the round whitefish, the pygmy whitefish, and the mountain whitefish. The remaining species, the Bonneville cisco, the Bonneville whitefish, and the Bear Lake whitefish are endemic to Bear Lake.

Species

There are currently six recognized species in this genus:The extinct species †Prosopium prolixus Kimmel, 1975 is known from Late Miocene and Early Pliocene-aged Deer Butte Formation of Oregon and the Glenns Ferry Formation of Idaho.

References

• Molly Hallock and Paul E. Mongillo, Washington Department of Fish and Wildlife "Washington State Status Report" (1998).