| Cryptomya Conrad, 1849 |
| Cryptomya californica (Conrad, 1837) |
| Cryptomyinae Habe, 1977 |
| Mya Linnaeus, 1758 |
| Mya arctica Linnaeus, 1767 |
| Mya arenaria Linnaeus, 1758 |
| Mya hyalina Conrad, 1831 |
| Mya mindorensis A. Adams & Reeve, 1850 |
| Mya nitens Montagu, 1808 |
| Mya perna Linnaeus, 1758 |
| Mya rostrata Spengler, 1793 |
| Mya suborbicularis Montagu, 1803 |
| Myidae Lamarck, 1809 |
| Myinae Lamarck, 1809 |
| Sphaenia Conrad, 1837 |
| Sphaenia californica Conrad, 1837 |
| Sphena Turton, 1822 |
| Sphena alternata d'Orbigny, 1853 |
| Sphena ornatissima d'Orbigny, 1853 |
| Sphenia Turton, 1822 |