Phylum Mollusca Linnaeus, 1758 - molluscs Class Bivalvia Linnaeus, 1758 - bivalves Subclass Protobranchia Pelseneer, 1889 Order Solemyida Dall, 1889 1 Superfamily Solemyoidea Gray, 1840 [monotypic] 2 Superfamily Nucinelloidea Vokes, 1956 [monotypic] see Superfamily Manzanelloidea Chronic, 1952