n = 14
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Prosopium abyssicola | (Snyder, 1919) | Prosopium abyssicola | Salmonidae | Bear Lake whitefish |
| Prosopium coulteri | (Eigenmann & Eigenmann, 1892) | Prosopium coulterii | Salmonidae | Pygmy whitefish |
| Prosopium coulterii | (Eigenmann & Eigenmann, 1892) | Prosopium coulterii | Salmonidae | Pygmy whitefish |
| Prosopium cylindraceum | (Pennant, 1784) | Prosopium cylindraceum | Salmonidae | Round whitefish |
| Prosopium cylindraceus | (Pennant, 1784) | Prosopium cylindraceum | Salmonidae | Round whitefish |
| Prosopium gemmifer | (Snyder, 1919) | Prosopium gemmifer | Salmonidae | Bonneville cisco |
| Prosopium gemmiferum | (Snyder, 1919) | Prosopium gemmifer | Salmonidae | Bonneville cisco |
| Prosopium oregonium | (Jordan & Snyder, 1909) | Prosopium williamsoni | Salmonidae | Mountain whitefish |
| Prosopium preblei | Harper & Nichols, 1919 | Prosopium cylindraceum | Salmonidae | Round whitefish |
| Prosopium quadrilaterale | (Richardson, 1823) | Prosopium cylindraceum | Salmonidae | Round whitefish |
| Prosopium snyderi | Myers, 1932 | Prosopium coulterii | Salmonidae | Pygmy whitefish |
| Prosopium spilonatus | (Snyder, 1919) | Prosopium spilonotus | Salmonidae | Bonneville whitefish |
| Prosopium spilonotus | (Snyder, 1919) | Prosopium spilonotus | Salmonidae | Bonneville whitefish |
| Prosopium williamsoni | (Girard, 1856) | Prosopium williamsoni | Salmonidae | Mountain whitefish |