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
             Family †Myophorellidae Kobayashi, 1954
               1 Subfamily †Myophorellinae Kobayashi, 1954
               2 Subfamily †Steinmanellinae Cooper, 1991