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 Polygyroidea Pilsbry, 1895 see Superfamily Helicoidea Rafinesque, 1815
             Family Thysanophoridae Pilsbry, 1926
               1 Genus Thysanophora Strebel & Pfeffer, 1880
               2 Genus Itzamna Pilsbry, 1926
               3 Genus Mcleania Bequaert & Clench, 1939
               4 Genus Microconus Strebel & Pfeffer, 1880
               5 Genus Microphysula Cockerell, 1926