| Superfamily Bulloidea Gray, 1827 |
| Family Retusidae Thiele, 1925 |
| Genus Retusa T. Brown, 1827 |
| Type species Bulla obtusa Montagu, 1803, by subsequent designation. |
| Superfamily Bulloidea Gray, 1827 |
| Family Retusidae Thiele, 1925 |
| Genus Retusa T. Brown, 1827 |
| Type species Bulla obtusa Montagu, 1803, by subsequent designation. |