Phylum Mollusca Linnaeus, 1758 - molluscs Subphylum Conchifera Gegenbauer, 1878 Class Gastropoda Cuvier, 1795 - snails and slugs Subclass Orthogastropoda Ponder & Lindberg, 1995 Superorder Neritaemorphi Koken, 1896 see Order Neritimorpha Golikov & Starobogatov, 1975 Order Neritopsina Cox & Knight, 1960 see Order Neritimorpha Golikov & Starobogatov, 1975 1 Superfamily Neritoidea Rafinesque, 1815