Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Divasibranchia Minichev & Starobogatov, 1975
       Order Stylommatophora Schmidt, 1855 see Infraorder Stylommatophora Schmidt, 1855
         (Helicid Sigmurethra)
           Superfamily Helixarionoidea Bourguignat, 1883, orth. inval.
             Family Helixarionidae Bourguignat, 1883, orth. inval. see Family Helicarionidae Bourguignat, 1877
               Subfamily Microcystinae Thiele, 1931
                 01 Genus Microcystis Beck, 1837
                 02 Genus Cookeana Baker, 1938
                 03 Genus Diastole Gude, 1913
                 04 Genus Hiona Cooke, 1940
                 05 Genus Kaala Cooke, 1940
                 06 Genus Kusaiea Baker, 1938
                 07 Genus Lamprocystis Pfeffer, 1882
                 08 Genus Liardetia Gude, 1913
                 09 Genus Mendana Baker, 1938
                 10 Genus Philonesia Sykes, 1900
                 11 Genus Pittoconcha Preston, 1913
                 12 Genus Pukaloa Baker, 1938
                 13 Genus Quintalia Preston, 1913
                 14 Genus Suterella Iredale, 1915
                 15 Genus Tengchiena Baker, 1942