Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Heterodonta Neumayr, 1884
         Order Pholadomyida Newell, 1965
           Superfamily Myochamoidea Carpenter, 1861
             1 Family Myochamidae Carpenter, 1861
             2 Family Cleidothaeridae Hedley, 1918 (1870)