n = 3
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Thoburnia atripinnis | (Bailey, 1959) | Thoburnia atripinnis | Catostomidae | Blackfin sucker |
| Thoburnia hamiltoni | Raney & Lachner, 1946 | Thoburnia hamiltoni | Catostomidae | Rustyside sucker |
| Thoburnia rhothoeca | (Thoburn, 1896) | Thoburnia rhothoeca | Catostomidae | Torrent sucker |