Phylum Mollusca Linnaeus, 1758 - molluscs Conchifera Gegenbaur, 1878 see Subphylum Conchifera Gegenbauer, 1878 Cyrtosoma Class Gastropoda Cuvier, 1795 - snails and slugs Eogastropoda Ponder & Lindberg, 1995 see Subclass Eogastropoda Ponder & Lindberg, 1995 1 Patellogastropoda Lindberg, 1986 see Order Patellogastropoda Lindberg, 1986