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
             Family Trigoniidae Lamarck, 1819
               1 Subfamily Trigoniinae Lamarck, 1819
               2 Subfamily †Minetrigoniinae Kobayashi, 1954
               3 Subfamily †Nototrigoniinae Skwarko, 1963
               4 Subfamily †Pleurotrigoniinae van Hoepen, 1929
               5 Subfamily †Neuquenitrigoniinae Leanza, 1993
               6 Subfamily †Psilotrigoniinae Fleming, 1987