| Leporimetis intastriata (Say, 1826) |
| Lyratellina Olsson, 1961 |
| Lyratellina lyra (Hanley, 1844) |
| Lyratellina lyrica (Pilsbry & Lowe, 1932) |
| Macaliopsis Cossmann, 1886 |
| Macoma Leach, 1819 |
| Macoma (Macoma) Leach, 1819 |
| Macoma (Macoploma) Pilsbry & Olsson, 1941 |
| Macoma (Macoploma) ecuadoriana Pilsbry & Olsson, 1941 |
| Macoma (Psammacoma) Dall, 1900 |
| Macoma (Psammacoma) carlottensis Whiteaves, 1880 |
| Macoma (Psammacoma) extenuata Dall, 1900 |
| Macoma (Psammacoma) siliqua (C. B. Adams, 1852) |
| Macoma (Psammacoma) tageliformis Dall, 1900 |
| Macoma (Psammacoma) yoldiformis Carpenter, 1864 |
| Macoma (Rexithaerus) Tryon, 1869 |
| Macoma (Rexithaerus) indentata P. P. Carpenter, 1864 |
| Macoma brevifrons (Say, 1834) |
| Macoma carlottensis Whiteaves, 1880 |
| Macoma cerina (C. B. Adams, 1845) |