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 Vitrinidae Fitzinger, 1833
               Subfamily Vitreinae Baker, 1930 see Family Pristilomatidae Cockerell, 1891
                 Genus Vitrea Fitzinger, 1833
                   Subgenus Monadea Westerlund, 1902