Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Protobranchia Pelseneer, 1889
       Order Nuculida Dall, 1889
         Superfamily Nuculanoidea Adams & Adams, 1858 (1854)
           01 Family Tindariidae Verrill & Bush, 1897 [monotypic]
           02 Family Lametilidae Allen & Sanders, 1973 see Family Phaseolidae Scarlato & Starobogatov, 1971
           03 Family Phaseolidae Scarlato & Starobogatov, 1971 [monotypic]
           04 Family Radiidentidae Egorova & Starobogatov, 1975, nom. illeg. [monotypic] see Family Siliculidae Allen & Sanders, 1973
           05 Family Nuculanidae Adams & Adams, 1858 (1854) - pointed nut clams
           06 Family Spinulidae Allen & Sanders, 1982 [monotypic] see Family Bathyspinulidae Coan & Valentich-Scott, 1997
           07 Family Yoldiidae Dall, 1908
           08 Family Siliculidae Allen & Sanders, 1973
           09 Family Malletiidae Adams & Adams, 1858 (1846)
           10 Family Neilonellidae Schileyko, 1989