Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Heterodonta Neumayr, 1884
         Order Venerida Gray, 1854
           Superfamily Cardioidea Lamarck, 1809 [monotypic]
             1 Family Cardiidae Lamarck, 1809 - cockles