Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Heterodonta Neumayr, 1884
         Order Pholadomyida Newell, 1965
           Superfamily Pholadomyoidea King, 1844
             Family †Sanguinolitidae Miller, 1877
               1 Subfamily †Sanguinolitinae Miller, 1877
               2 Subfamily †Alulinae Morris, Dickins & Astafieva-Urbajtis, 1991
               3 Subfamily †Chaenomyinae Waterhouse, 1966
               4 Subfamily †Pholadellinae Miller, 1877
               5 Subfamily †Undulomyinae Astafieva-Urbajtis, 1983
               6 Subfamily †Vacunellinae Astafieva-Urbajtis, 1973