| Lamelliconcha unicolor (G. B. Sowerby I, 1835) |
| Lamelliconcha vinaceus Olsson, 1961 |
| Leukoma Römer, 1857 |
| Leukoma asperrima (G. B. Sowerby I, 1835) |
| Leukoma beili (Olsson, 1961) |
| Leukoma columbiensis (G. B. Sowerby I, 1835) |
| Leukoma grata (Say, 1831) |
| Leukoma histrionica (G. B. Sowerby I, 1835) |
| Leukoma laciniata (P. P. Carpenter, 1864) |
| Leukoma metodon (Pilsbry & Lowe, 1932) |
| Leukoma staminea (Conrad, 1837) |
| Leukoma sugillata (Reeve, 1863) |
| Lirophora Conrad, 1863 |
| Lirophora clenchi (Pulley, 1952) |
| Lirophora latilirata (Conrad, 1841) |
| Lirophora mariae (d'Orbigny, 1846) |
| Lirophora obliterata (Dall, 1902) |
| Lirophora paphia (Linnaeus, 1767) |
| Macrocallista Meek, 1876 |
| Macrocallista (Chionella) Cossmann, 1886 |