Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Protobranchia Pelseneer, 1889
       Order Nuculida Dall, 1889
         Superfamily Nuculoidea Gray, 1824
           Family Nuculidae Gray, 1824 - nut clams
             01 Genus Acila Adams & Adams, 1858
             02 Genus Brevinucula Thiele, 1934
             03 Genus Condylonucula Moore, 1977
             04 Genus Deminucula Iredale, 1931
             05 Genus †Deshayesii Berge, 1847, nom. dub.
             06 Genus †Gibbonucula Eames, 1951
             07 Genus Linucula Marwick, 1931
             08 Genus Nucula Lamarck, 1799
             09 Genus †Nuculanella Tasch, 1953
             10 Genus †Nuculavus Tschernyschev, 1943
             11 Genus †Nuculoidea Williams & Breger, 1916
             12 Genus Nuculoma Cossmann, 1907
             13 Genus Pronucula Hedley, 1902
             14 Genus Rumptonucula Vaught, 1989, orth. inval. see Genus Rumptunucula Bergmans, 1978
             15 Genus Sinonucula Xu, 1984