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
         Superfamily Planorbioidea Vaught, 1989, orth. inval. see Superfamily Planorboidea Rafinesque, 1815
           Family Planorbidae Rafinesque, 1815 - planorbids
             Subfamily Planorbinae Rafinesque, 1815
               Tribe Planorbeae Zilch, 1959, orth. inval. see Tribe Planorbini Rafinesque, 1815
                 Genus Gyraulus Agassiz, 1837
                   1 Subgenus Armiger Hartmann, 1843 see Genus Armiger Hartmann, 1843
                   2 Subgenus Caillaudia Bourguignat, 1883
                   3 Subgenus Carinogyraulus Polinski, 1929
                   4 Subgenus Ceratophallus Brown & Mandahl-Barth, 1973
                   5 Subgenus Choanomphalodes Lindholm, 1927
                   6 Subgenus Lamorbis Starobogatov, 1967
                   7 Subgenus Nautilinus Mousson, 1872
                   8 Subgenus Torquis Dall, 1905