| Phylum: | MOLLUSCA | |
| Classe: | GASTROPODA | Cuvier, 1797 |
| Ordine: | MESOGASTROPODA | Thiele, 1925 |
| LITTORINOIDEA | Gray, 1840 | RISSOIDEA | Gray, 1847 |
| ALVANIOIDEA | Golikov & Starobogatov, 1975 | RISSOINOIDEA | Stoliczka, 1868 |
| CERITHIOIDEA | Fleming, 1822 | EPITONIOIDEA | Berry, S.S., 1910 |
| HIPPONICOIDEA | Troschel, 1861 | CALYPTRAEOIDEA | Blainville, 1824 |
| STROMBOIDEA | Rafinesque, 1815 | XENOPHOROIDEA | Troschel, 1852 |
| VERMETOIDEA | Rafinesque, 1815 | CYPRAEOIDEA | Rafinesque, 1815 |
| NATICOIDEA | Gray, 1840 | TONNOIDEA | Peile, 1926 |