Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Heterodonta Neumayr, 1884
         Order Carditida Dall, 1889
           Superfamily Crassatelloidea Férussac, 1822
             1 Family Crassatellidae Férussac, 1822
             2 Family Astartidae d'Orbigny, 1844 (1840) - astarte clams
             3 Family †Eodonidae Carter, Campbell & Campbell, 2000
             4 Family †Ptychomyidae Keen, 1969