Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Mollusca Linnaeus, 1758 - molluscs
     Subphylum Diasoma Runnegar & Pojeta Jr., 1974 see Phylum Mollusca Linnaeus, 1758
       Class Pelecypoda Goldfuss, 1820 see Class Bivalvia Linnaeus, 1758
         Subclass Palaeotaxodonta Korobkov, 1954 see Subclass Protobranchia Pelseneer, 1889
           Genus †Alococoncha Pojeta & Gilbert-Tomlinson, 1977
           Genus †Cardiolaria Munier-Chalmas, 1876
           Genus †Ctenodonta Salter, 1852
           Genus †Deceptrix Fuchs, 1919
           Genus †Johnmartinia Pojeta & Gilbert-Tomlinson, 1977
           Genus Lembulus Risso, 1826
           Genus Malletia Des Moulins, 1832
           Genus Nucula Lamarck, 1799
           Genus †Nuculites Conrad, 1841
           Genus †Palaeoneilo Hall & Whitfield, 1869
           Genus †Phestia Chernyshev, 1951
           Genus †Similodonta Soot-Ryen, 1965
           Genus Solemya Lamarck, 1818
           Genus †Tancrediopsis Beushausen, 1895
           Genus Yoldia Møller, 1842