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 Vitrinoidea Fitzinger, 1833 see Superfamily Limacoidea Batsch, 1789
             Family Zonitidae Mörch, 1864
               Subfamily Zonitinae Mörch, 1864 see Family Zonitidae Mörch, 1864
                 Genus Retinella Fischer, 1877
                   1 Subgenus Gyralina Andreae, 1902
                   2 Subgenus Lyrodiscus Pilsbry, 1893
                   3 Subgenus Meledella Sturany, 1908
                   44 Subgenus Pseudopolita Germain, 1908
                   5 Subgenus Spelaeopatula Wagner, 1922