Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Protobranchia Pelseneer, 1889
       Order Nuculida Dall, 1889
         Superfamily †Ctenodontoidea Wöhrmann, 1893, nom. illeg. [monotypic]
           Family †Ctenodontidae Wöhrmann, 1893, nom. illeg.
             01 Genus †Clinopistha Meek & Worthen, 1870
             02 Genus †Ctenodonta Salter, 1852
             03 Genus †Ditichia Sandberger, 1891
             04 Genus †Dystactella Hall & Whitfield, 1872
             05 Genus †Praectenodonta Philip, 1962
             06 Genus †Trancrediopsis orth. inval. see Genus Tancrediopsis Beushausen, 1895
             07 Genus †Tellinopsis Hall, 1869