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 Ariopeltinae Sirgel, 1985 Genus Ariopelta Sirgel, 1985