| Phylum: | MOLLUSCA | |
| Classe: | GASTROPODA | Cuvier, 1797 |
| Ordine: | MESOGASTROPODA | Thiele, 1925 |
| Superfamiglia: | TONNOIDEA | Peile, 1926 |
| Tonnidae | Suter, 1913 | Ficidae | Meek, 1864 |
| Cassididae | Swainson, 1832 | Ranellidae | Gray, 1854 |
| Personidae | Bursidae | Thiele, 1925 | |
| Oocorythidae | Fischer P., 1883 |