living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Mollusca Linnaeus, 1758 - molluscs
           Class Bivalvia Linnaeus, 1758 - bivalves
             Subclass Protobranchia Pelseneer, 1889
               Order Nuculoida - nut clams see Order Nuculida Dall, 1889
                 1 Superfamily Nuculacea Gray, 1824 see Superfamily Nuculoidea Gray, 1824
                 2 Superfamily Nuculanacea Adams & A, 1858, nom. illeg. see Superfamily Nuculanoidea Adams & Adams, 1858 (1854)