Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Heterodonta Neumayr, 1884
         Order Venerida Gray, 1854
           Superfamily Cyamioidea Sars, 1878
             1 Family Cyamiidae Sars, 1878
             2 Family Basterotiidae Cossmann, 1909
             3 Family Galatheavalvidae Knudsen, 1970
             4 Family Sportellidae Dall, 1899