| Ennucula tenuis (Montagu, 1808) |
| Leionucula Quenstedt, 1930 |
| Nucula Lamarck, 1799 |
| Nucula (Lamellinucula) Schenck, 1944 |
| Nucula (Lamellinucula) carlottensis Dall, 1897 |
| Nucula (Lamellinucula) exigua G. B. Sowerby I, 1833 |
| Nucula (Lamellinucula) keenae F. R. Bernard, 1983 |
| Nucula (Lamellinucula) schencki Hertlein & Strong, 1940 |
| Nucula (Lamellinucula) takashii F. R. Bernard, 1983 |
| Nucula (Leionucula) Quenstedt, 1930 |
| Nucula (Leionucula) yaquinae F. R. Bernard, 1983 |
| Nucula (Nucolopsis) Woodring, 1925 |
| Nucula (Nucolopsis) schencki Hertlein & Strong, 1940 |
| Nucula (Nucula) Lamarck, 1799 |
| Nucula (Nucula) declivis Hinds, 1843 |
| Nucula (Nucula) profundorum E. A. Smith, 1885 |
| Nucula acuta Conrad, 1832 |
| Nucula aegeensis Forbes, 1844 |
| Nucula calcicola D. R. Moore, 1977 |
| Nucula callicredemna Dall, 1890 |