Phylum [Mollusca] Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Mesogastropoda Thiele, 1925 - mesogastropods see [unranked] mesogastropods
         Suborder Taenioglossa see Order Mesogastropoda Thiele, 1925
           Superfamily Cerithiacea Férussac, 1819 see Superfamily Cerithioidea Fleming, 1822
             Family Modulidae Fischer, 1884
               Genus Modulus Gray, 1842