| Placostegus calciferus Treadwell, 1929 |
| Placostegus cariniferus (J.E. Gray, 1843) |
| Placostegus cariniferus var. kraussii Baird, 1865 |
| Pomatoceros Philippi, 1844 |
| Pomatoceros americanus Day, 1973 |
| Pomatoceros caeruleus (Schmarda, 1861) |
| Pomatoceros minutus Rioja, 1941 |
| Pomatoceros triqueter (Linnaeus, 1767) |
| Pomatostegus Schmarda, 1861 |
| Pomatostegus stellatus (Abildgaard, 1789) |
| Pomatostegus stellatus var. fruticosa Mörch, 1863 |
| Pomatostegus stellatus var. pentapoma Mörch, 1863 |
| Pomatostegus stellatus var. tetrapoma Mörch, 1863 |
| Protis Ehlers, 1887 |
| Protis hydrothermica ten Hove & Zibrowius, 1986 |
| Protolaeospira Pixell, 1912 |
| Protolaeospira eximia (Bush, 1905) |
| Protula Risso, 1826 |
| Protula atypha Bush, 1905 |
| Protula balboensis Monro, 1933 |