Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Neogastropoda Wenz, 1938 see Suborder Neogastropoda Wenz, 1938
         Suborder Stenoglossa Bouvier, 1887
           Superfamily Muricoidea Rafinesque, 1815
             Family Olividae Latreille, 1825 - olive snails
               Subfamily Ancillinae Adams & Adams, 1853 see Subfamily Ancillariinae Swainson, 1840
                 Genus Ancilla Lamarck, 1799
                   Subgenus Ancillus Montfort, 1810, nom. illeg. see Subgenus Ancilla Lamarck, 1799