Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Heterodonta Neumayr, 1884
         Order Pholadomyida Newell, 1965
           1 Family †Ucumariidae Sánchez, 2003
           2 Superfamily Ceratomyoidea Arkell, 1934 [monotypic]
           3 Superfamily Clavagelloidea d'Orbigny, 1844
           4 Superfamily †Edmondioidea King, 1850
           5 Superfamily Myochamoidea Carpenter, 1861
           6 Superfamily Pandoroidea Rafinesque, 1815
           7 Superfamily Pholadomyoidea King, 1844
           8 Superfamily Thracioidea Stoliczka, 1870 (1839)
           9 Septibranchia Pelseneer, 1888