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 Cassinae Latreille, 1825
                 1 Genus Cassis Scopoli, 1777
                 2 Genus Cypraecassis Stutchbury, 1837
                 3 Genus Galeodea Link, 1807
                 4 Genus Sconsia Gray, 1847
                 5 Genus Herculea Adams & Adams, 1858