Phylum [Mollusca] Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Heterogastropoda see Superfamily Heterogastropoda
         Suborder Ptenoglossa Gray, 1853 see Infraorder Ptenoglossa Gray, 1853
           Superfamily Epitoniacea Berry, 1910 see Superfamily Epitonioidea Berry, 1910 (1812)
             Family Epitoniidae Berry, 1910 (1812) - wentletraps
               Genus Epitonium Röding, 1798
                 Subgenus Epitonium (Spiniscala) Boury, 1909 see Genus Spiniscala Boury, 1909