Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Protobranchia Pelseneer, 1889
       Order Nuculida Dall, 1889
         Superfamily Nuculoidea Gray, 1824
           Family †Praenuculidae McAlester, 1969
             1 Genus †Cardiolaria Munier-Chalmas, 1876
             2 Genus †Deceptrix Fuchs, 1919
             3 Genus †Honeymania McLearn, 1918
             4 Genus †Ledopsis Beushausen, 1884
             5 Genus †Palaeoconcha Miller, 1889
             6 Genus †Palaeoconchiella Vologdin, 1955
             7 Genus †Praeleda Pfab, 1934
             8 Genus †Praenucula Pfab, 1934
             9 Genus †Pseudoledopsis Maillieux, 1937