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 Arionoidea Gray, 1840
             Family Arionidae Gray, 1840
               Subfamily Arioninae Gray, 1840 see Family Arionidae Gray, 1840
                 1 Genus Arion Férussac, 1819
                 2 Genus Ariunculus Lessona, 1881
                 3 Genus Letourneuxia Bourguignat, 1866
                 4 Genus Geomalacus Allman, 1843