Haplopoma should probably be placed in a new family.
Type species: Flustra impressa Audouin, 1826
This genus includes the species:
| Haplopoma bimucronatum | (Moll, 1803) | Recent | Europe |
| Haplopoma bimucronatum occiduum | (Waters, 1877) | Recent | Mediterranean |
| Haplopoma graniferum | (Johnston, 1847) | Recent | Europe |
| Haplopoma graniferum carinatum | (Calvet, 1902) | Recent | Mediterranean |
| Haplopoma impressum | (Audouin, 1826) | Recent | Red Sea |
| Haplopoma planum | Ryland, 1963 | Recent | Europe |
| Haplopoma sciaphilum | Silen & Harmelin, 1976 | Recent | Mediterranean |
Harmer notebook - entry for Haplopoma