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 (Achatinid Sigmurethra) 1 Suborder Sigmurethra Pilsbry, 1900 see Group Sigmurethra Pilsbry, 1900