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 Anadeninae Pilsbry, 1948 see Family Anadenidae Pilsbry, 1948
                 1 Genus Anadenus Heynemann, 1863
                 2 Genus Anadenulus Cockerell, 1890
                 3 Genus Nipponarion Yamaguchi & Habe, 1955
                 4 Genus Prophysaon Bland & Binney, 1873