Prosopium
| Prosopium Temporal range:  | |
|---|---|
| Prosopium cylindraceum | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Actinopterygii | 
| Order: | Salmoniformes | 
| Family: | Salmonidae | 
| Subfamily: | Coregoninae | 
| Genus: | Prosopium D. S. Jordan, 1878 | 
| Type species | |
| Coregonus cylindraceus Pennant, 1784 | |
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.