| Axinactis Mörch, 1861 |
| Axinactis delessertii (Reeve, 1843) |
| Axinactis inaequalis (G. B. Sowerby I, 1833) |
| Glycymerididae Newton, 1916 |
| Glycymeris da Costa, 1778 |
| Glycymeris americana (Defrance, 1826) |
| Glycymeris bitruncata Conrad, 1872 |
| Glycymeris canoa Pilsbry & Olsson, 1941 |
| Glycymeris decussata (Linnaeus, 1758) |
| Glycymeris gigantea (Reeve, 1843) |
| Glycymeris maculata (Broderip, 1832) |
| Glycymeris pectinata (Gmelin, 1791) |
| Glycymeris septentrionalis (Middendorff, 1849) |
| Glycymeris spectralis Nicol, 1952 |
| Glycymeris undata (Linnaeus, 1758) |
| Pectunculus Lamarck, 1799 |
| Pectunculus americanus Defrance, 1826 |
| Pectunculus bicolor Reeve, 1843 |
| Pectunculus delessertii Reeve, 1843 |
| Pectunculus giganteus Reeve, 1843 |