| Phylum: | MOLLUSCA | |
| Classe: | GASTROPODA | Cuvier, 1797 |
| ARCHAEOGASTROPODA | Thiele, 1925 | MESOGASTROPODA | Thiele, 1925 |
| HETEROPODA | Children, 1824 | NEOGASTROPODA | Thiele, 1929 |
| BULLOMORPHA | Pelseneer, 1906 | PYRAMIDELLOMORPHA | |
| THECOSOMATA | Blainville, 1824 | ARCHAEOPULMONATA | Morton, 1955 |
| GEOPHILA | Ferussac, 1812 | APLYSIOMORPHA | Pelseneer, 1906 |
| PLEUROBRANCHOMORPHA | Pelseneer, 1906 | SACOGLOSSA | von Ihering, 1876 |
| BASOMMATOPHORA | Schmidt, 1855 |