| Omorgus (Omorgus) tomentosus (Robinson, 1941) |
| Omorgus (Omorgus) umbonatus LeConte, 1854 |
| Trogidae MacLeay, 1819 |
| Troginae MacLeay, 1819 |
| Trox Fabricius, 1775 |
| Trox (Niditrox) Nikolaev, 2016 |
| Trox (Niditrox) aequalis Say, 1831 |
| Trox (Trox) Fabricius, 1775 |
| Trox (Trox) acanthinus Harold, 1872 |
| Trox (Trox) atrox LeConte, 1854 |
| Trox (Trox) gemmulatus Horn, 1874 |
| Trox (Trox) plicatus Robinson, 1940 |
| Trox (Trox) sonorae LeConte, 1854 |
| Trox (Trox) spinulosus Robinson, 1940 |
| Trox (Trox) spinulosus subsp. dentibius Robinson, 1940 |