Phylum Mollusca Linnaeus, 1758 - molluscs Conchifera Gegenbaur, 1878 see Subphylum Conchifera Gegenbauer, 1878 Class Bivalvia Linnaeus, 1758 - bivalves "Protobranchia" Pelseneer, 1889 see Subclass Protobranchia Pelseneer, 1889