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 Urocyclidae Simroth, 1889
               Subfamily Trochozonitinae Iredale, 1914 see Subfamily Sheldoniinae Connolly, 1925 (1912)
                 Genus Trochonanina Mousson, 1869
                   1 Subgenus Bloyetia Bourguignat, 1889
                   2 Subgenus Crenatinanina Germain, 1920
                   3 Subgenus Falloonella Preston, 1914
                   4 Subgenus Montanobloyetia Verdcourt, 1961
                   5 Subgenus Percivalia Preston, 1914
                   6 Subgenus Plicatonanina Verdcourt, 1961
                   7 Subgenus Sjostedtina Verdcourt, 1961
                   8 Subgenus Zingis Martens, 1878