| Adontorhina Berry, 1947 |
| Adontorhina cyclia Berry, 1947 |
| Adontorhina zelayai Valentich-Scott & Coan, 2012 |
| Axinopsida Keen & Chavan, 1951 |
| Axinopsida serricata (P. P. Carpenter, 1864) |
| Axinulus Verrill & Bush, 1898 |
| Axinulus thackergeigeri Valentich-Scott & Coan, 2012 |
| Axinus J. C. Sowerby, 1821 |
| Axinus grandis (Verrill & S. I. Smith, 1885) |
| Channelaxinus Valentich-Scott & Coan, 2012 |
| Channelaxinus oliveri Valentich-Scott & Coan, 2012 |
| Conchocele Gabb, 1866 |
| Conchocele excavata (Dall, 1901) |
| Cryptodon Turton, 1822 |
| Cryptodon grandis Verrill & S. I. Smith, 1885 |
| Cryptodon serricatus P. P. Carpenter, 1864 |
| Thyasira Lamarck, 1818 |
| Thyasira barbarensis (Dall, 1890) |
| Thyasira excavata Dall, 1901 |
| Thyasira flexuosa (Montagu, 1803) |