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 Xenophoroidea Troschel, 1852 (1840) [monotypic]
             Family Xenophoridae Troschel, 1852 (1840) [monotypic] - carrier snails
               Genus Xenophora Fischer von Waldheim, 1807
                 Subgenus Onustus Swainson, 1840