Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Divasibranchia Minichev & Starobogatov, 1975
       Order Basommatophora Keferstein, 1865 see Suborder Basommatophora Keferstein, in Bronn, 1864
         1 Superfamily Siphonarioidea Gray, 1827
         2 Superfamily Amphiboloidea Gray, 1840 [monotypic]
         3 Superfamily Chilinoidea Dall, 1870
         4 Superfamily Acroloxoidea Thiele, 1931 [monotypic] - freshwater limpets
         5 Superfamily Lymnaeoidea Rafinesque, 1815
         6 Superfamily Glacidorboidea Ponder, 1986 [monotypic]
         7 Superfamily Physoidea Fitzinger, 1833 [monotypic]
         8 Superfamily Planorbioidea Vaught, 1989, orth. inval. see Superfamily Planorboidea Rafinesque, 1815