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 Polygyridae Pilsbry, 1895
               Subfamily Triodopsinae Pilsbry, 1940
                 Genus Allogona Pilsbry, 1939
                   Subgenus Dysmedona Millard, 1997, orth. inval. see Subgenus Dysmedoma Pilsbry, 1939