Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Palaeoheterodonta Newell, 1965
         Order Trigoniida Dall, 1889
           Superfamily †Myophorelloidea Kobayashi, 1954
             1 Family †Myophorellidae Kobayashi, 1954
             2 Family †Buchotrigoniidae Leanza, 1993
             3 Family †Laevitrigoniidae Saveliev, 1958
             4 Family †Vaugoniidae Kobayashi, 1954