Phylum Mollusca Linnaeus, 1758 - molluscs
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs
see Class Gastropoda Cuvier, 1795
Order Caenogastropoda Cox, 1960
see Superorder Caenogastropoda Cox, 1960
Suborder Ptenoglossa Gray, 1853
see Infraorder Ptenoglossa Gray, 1853
Family Triforidae Jousseaume, 1884
see Family Triphoridae Gray, 1847
1 Subfamily Triforinae Jousseaume, 1884 [monotypic]
2 Subfamily Sherborniinae Iredale, 1917 [monotypic]
3 Subfamily Cerithiellinae Golikov & Starobogatov, 1975
see Subfamily Newtoniellinae Korobkov, 1955