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 Tridacnoidea Lamarck, 1819 see Superfamily Cardioidea Lamarck, 1809
           Family Tridacnidae - giant clams see Subfamily Tridacninae Lamarck, 1819
             Genus Tridacna Bruguière, 1797
               Subgenus Chametrachea Mörch, 1853