Phylum Mollusca Linnaeus, 1758 - molluscs Class Bivalvia Linnaeus, 1758 - bivalves Subclass Protobranchia Pelseneer, 1889 Order Nuculida Dall, 1889 Superfamily Nuculanoidea Adams & Adams, 1858 (1854) Family Nuculanidae Adams & Adams, 1858 (1854) - pointed nut clams Subfamily Ledellinae Allen & Sanders, 1982 1 Genus Ledella Verrill & Bush, 1897 2 Genus Tindariopsis Verrill & Bush, 1897