Phylum Mollusca Linnaeus, 1758 - molluscs Class Gastropoda Cuvier, 1795 - snails and slugs Subclass Divasibranchia Minichev & Starobogatov, 1975 Order Basommatophora Keferstein, 1865 see Suborder Basommatophora Keferstein, in Bronn, 1864 Superfamily Lymnaeoidea Rafinesque, 1815 Family Lymnaeidae Rafinesque, 1815 Genus Pacifimyxas Kruglov & Starobogatov, 1985