Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Heterodonta Neumayr, 1884
         Order Pholadomyida Newell, 1965
           Superfamily Pandoroidea Rafinesque, 1815
             1 Family Pandoridae Rafinesque, 1815
             2 Family Lyonsiidae Fischer, 1887