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 Mactroidea Lamarck, 1809
           Family Mactridae Lamarck, 1809 - surf clams
             Subfamily Mactrinae Lamarck, 1809
               01 Genus Mactra Linnaeus, 1767
               02 Genus Aktschagylia Starobogatov, 1970
               03 Genus Harvella Gray, 1853
               04 Genus Mactrellona Marks, 1951
               05 Genus Mactromeris Conrad, 1868
               06 Genus Mulinia Gray, 1837
               07 Genus Pseudocardium Gabb, 1869
               08 Genus Rangia Des Moulins, 1832
               09 Genus Rugosoxyperas Habe, 1977
               10 Genus Scalpomactra Finlay, 1928
               11 Genus Scissodesma Gray, 1837
               12 Genus Spisula Gray, 1837
               13 Genus Tumbeziconcha Pilsbry & Olsson, 1935