Phylum [Mollusca] Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Opisthobranchia Milne-Edwards, 1848 - opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848
       Order Cephalaspidea Fischer, 1883
         Superfamily Bullacea see Superfamily Bulloidea Gray, 1827
           Family Haminoeidae Pilsbry, 1895
             Genus Atys Montfort, 1810
               Subgenus Atys (Atys) Montfort, 1810 see Genus Atys Montfort, 1810