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 Urocyclinae Simroth, 1889
                 01 Genus Urocyclus Gray, 1864
                 02 Genus Acantharion Binder & Tillier, 1985
                 03 Genus Amatarion van Mol, 1970
                 04 Genus Anisotoxon van Goethem, 1975
                 05 Genus Aspidelus Morelet, 1883
                 06 Genus Aspidotomium Degner, 1932
                 07 Genus Atoxon Simroth, 1888
                 08 Genus Atoxonoides van Goethem, 1973
                 09 Genus Bukobia Simroth, 1896
                 10 Genus Camerunarion van Mol, 1970
                 11 Genus Centraficarion Vaught, 1989, orth. inval. see Genus Centrafricarion van Mol, 1970
                 12 Genus Chlamydarion van Mol, 1968
                 13 Genus Dendrolimax Heynemann, 1868
                 14 Genus Estria Poirier, 1887
                 15 Genus Elisolimx Millard, 1996, orth. inval. see Genus Elisolimax Cockerell, 1893
                 16 Genus Kirkia Pollonera, 1909
                 17 Genus Leptichnoides van Goethem, 1975
                 18 Genus Leptichnus Simroth, 1896
                 19 Genus Nupnus van Goethem, 1975
                 20 Genus Pembatoxon van Goethem, 1975
                 21 Genus Phaneroporus Simroth, 1888
                 22 Genus Pseudatoxon van Goethem, 1975
                 23 Genus Rhopalogonium Degner, 1932
                 24 Genus Sylvarion van Mol, 1970
                 25 Genus Senegalarion van Mol, 1970
                 26 Genus Thielarion van Mol, 1970
                 27 Genus Tresia van Goethem, 1975
                 28 Genus Trichotoxon Simroth, 1888
                 29 Genus Verdcourtia van Mol, 1970
                 30 Genus Verrucarion van Mol, 1970