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 Nuculaninae Adams & Adams, 1858 (1854)
               Genus Nuculana Link, 1807
                 1 Subgenus Costanuculana Habe, 1951
                 2 Subgenus Jupiteria Bellardi, 1875
                 3 Subgenus Saccella Woodring, 1925
                 4 Subgenus Sinoleda Xu, 1984