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
Genus Nipponarion Yamaguchi & Habe, 1955