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
             1 Subfamily Cardiinae Lamarck, 1809
             2 Subfamily Trachycardiinae Stewart, 1930
             3 Subfamily Fraginae Stewart, 1930
             4 Subfamily Protocardiinae Reuss, 1846
             5 Subfamily Laevicardiinae Keen, 1951
             6 Subfamily Cerastodermatiinae Voskuil & Onverwagt, 1989, orth. inval. [monotypic] see Subfamily Cerastodermatinae Nordsieck, 1969
             7 Subfamily Clinocardiinae Kafanov, 1975