Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884
       Order Chamida see Order Venerida Gray, 1854
         Superfamily Crassatelloidea Férussac, 1822 [monotypic]
           Family Crassatellidae Férussac, 1822
             Subfamily Crassatellinae Férussac, 1822
               Genus Eucrassatella Iredale, 1924
                 1 Subgenus Hybolophus Stewart, 1930
                 2 Subgenus Spissatella Finlay, 1926
                 3 Subgenus Crassasulca Vokes, 1988