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 Littorinoidea Children, 1834
             1 Family Littorinidae Children, 1834 - periwinkles
             2 Family Lacunidae Gray, 1857 see Subfamily Lacuninae Gray, 1857
             3 Family Pomatiasidae Gray, 1852 see Family Pomatiidae Newton, 1891 (1828)
             4 Family Annulariidae Henderson & Bartsch, 1920 see Tribe Annulariini Henderson & Bartsch, 1920
             5 Family Skeneopsidae Iredale, 1915
             6 Family Truncatellidae Gray, 1840