| Arcopsis Koenen, 1885 |
| Arcopsis adamsi (Dall, 1886) |
| Arcopsis solida (G. B. Sowerby I, 1833) |
| Eontia MacNeil, 1938 |
| Noetia Gray, 1857 |
| Noetia (Eontia) MacNeil, 1938 |
| Noetia (Eontia) ponderosa (Say, 1822) |
| Noetia (Noetia) Gray, 1857 |
| Noetia (Noetia) magna MacNeil, 1937 |
| Noetia (Noetia) reversa (G. B. Sowerby I, 1833) |
| Noetia olssoni Sheldon & Maury, 1922 |
| Noetiidae Stewart, 1930 |
| Sheldonella Maury, 1917 |
| Sheldonella delgada (Lowe, 1935) |
| Sheldonella olssoni (Sheldon & Maury, 1922) |