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
           1 Family Cardiidae Lamarck, 1809 - cockles
           2 Family Hemidonacidae Scarlato & Starobogatov, 1971 [monotypic]
           3 Family Lymnocardiidae Stoliczka, 1870 see Subfamily Lymnocardiinae Stoliczka, 1870