Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Palaeoheterodonta Newell, 1965
         Order Trigoniida Dall, 1889
           Superfamily †Megatrigonioidea van Hoepen, 1929
             Family †Megatrigoniidae van Hoepen, 1929
               Subfamily †Apiotrigoniinae Tashiro, 1979
                 1 Tribe †Apiotrigoniini Tashiro, 1979
                 2 Tribe †Heterotrigoniini Cooper, 1991