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 Cardioidea Lamarck, 1809
           Family Cardiidae Lamarck, 1809 - cockles
             Subfamily Fraginae Stewart, 1930
               Genus Ctenocardia Adams & Adams, 1857
                 1 Subgenus Afrocardium Tomlin, 1931 see Genus Afrocardium Tomlin, 1931
                 2 Subgenus Microfragum Habe, 1951