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
             1 Family Vitrinidae Fitzinger, 1833
             2 Family Zonitidae Mörch, 1864
             3 Family Daudebardiidae Kobelt, 1906 see Subfamily Daudebardiinae Kobelt, 1906
             4 Family Parmacellidae Fischer, 1856 (1855), nom. protect.
             5 Family Milacidae Ellis, 1926