Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Palaeoheterodonta Newell, 1965
         Order Trigoniida Dall, 1889
           Superfamily Trigonioidea Lamarck, 1819
             1 Family Trigoniidae Lamarck, 1819
             2 Family †Eoschizodidae Newell & Boyd, 1975
             3 Family †Groeberellidae Pérez, Reyes & Damborenea, 1995
             4 Family †Myophoriidae Bronn, 1849
             5 Family †Prosogyrotrigoniidae Kobayashi, 1954
             6 Family †Scaphellinidae Newell & Ciriacks, 1962
             7 Family †Schizodidae Newell & Boyd, 1975
             8 Family †Sinodoridae Pojeta & Zhang, 1984