| Cyrilla A. Adams, 1860 |
| Cyrilla munita Dall, 1898 |
| Huxleyia A. Adams, 1860 |
| Huxleyia munita (Dall, 1898) |
| Nucinella S. V. Wood, 1851 |
| Nucinella subdola (Strong & Hertlein, 1937) |
| Nucinella woodii (Dall, 1898) |
| Nucinellidae H. E. Vokes, 1956 |
| Pleurodon S. V. Wood, 1840 |
| Pleurodon adamsi Dall, 1898 |
| Pleurodon woodii Dall, 1898 |