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 Gastrodontoidea Tryon, 1866 [monotypic] Family Gastrodontidae Tryon, 1866 Genus Poecilozonites Boettger, 1884 Subgenus Discozonites Pilsbry, 1924