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
               1 Subfamily †Megatrigoniinae van Hoepen, 1929
               2 Subfamily †Apiotrigoniinae Tashiro, 1979
               3 Subfamily †Pterotrigoniinae van Hoepen, 1929