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 Neotaenioglossa Haller, 1882
see Order Sorbeoconcha Ponder & Lindberg, 1997
Superfamily Cassoidea Latreille, 1825
Family Cassidae P.A. Latreille, 1825 - helmet snails
see Subfamily Cassinae Latreille, 1825
Subfamily Oocorythinae Fischer, 1885
Genus Dalium Dall, 1889