Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Conchifera Gegenbauer, 1878
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Subclass Orthogastropoda Ponder & Lindberg, 1995
         Superorder Caenogastropoda Cox, 1960
           Order Sorbeoconcha Ponder & Lindberg, 1997
             Suborder Hypsogastropoda Ponder & Lindberg, 1997
               Infraorder Littorinimorpha Pchelintsev, 1963
                 Superfamily Littorinoidea Children, 1834
                   1 Family Littorinidae Children, 1834 - periwinkles
                   2 Family Pickworthiidae Iredale, 1917
                   3 Family Skeneopsidae Iredale, 1915
                   4 Family Zerotulidae Warén & Hain, 1996
                   5 Family Pomatiasidae Gray, 1852 see Family Pomatiidae Newton, 1891 (1828)
                   6 Family Annulariidae Henderson & Bartsch, 1920 see Tribe Annulariini Henderson & Bartsch, 1920