Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Conchifera Gegenbauer, 1878
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Subclass Orthogastropoda Ponder & Lindberg, 1995
         Superorder Vetigastropoda Salvini-Plawen, 1980 see Order Vetigastropoda Salvini-Plawen, 1980
           Superfamily Trochoidea Rafinesque, 1815
             1 Family Pendromidae Warén, 1991
             2 Family Skeneidae Clark, 1851 see Subfamily Skeneinae Clark, 1851
             3 Family Trochaclididae Thiele, 1928 see Family Ataphridae Cossmann, 1915
             4 Family Trochidae Rafinesque, 1815 - top snails
             5 Family Turbinidae Rafinesque, 1815 - turban snails