Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Heterodonta Neumayr, 1884
         Superfamily †Modiomorphoidea Miller, 1877
           1 Family †Modiomorphidae Miller, 1877
           2 Family †Cypricardiniidae Ulrich, 1894
           3 Family †Hippopodiumidae Cox, 1969
           4 Family †Palaeopharidae Marwick, 1953
           5 Family †Tusayanidae Scarlato & Starobogatov, 1979