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]
             Family Cardiidae Lamarck, 1809 - cockles
               01 Subfamily Cardiinae Lamarck, 1809
               02 Subfamily Clinocardiinae Kafanov, 1975
               03 Subfamily Fraginae Stewart, 1930
               04 Subfamily †Lahilliinae Finlay & Marwick, 1937
               05 Subfamily Laevicardiinae Keen, 1951
               06 Subfamily Lymnocardiinae Stoliczka, 1870
               07 Subfamily †Pleuriocardiinae Schneider, 1995
               08 Subfamily Orthocardiinae Schneider, 2002
               09 Subfamily †Profraginae Badve, 1977
               10 Subfamily Protocardiinae Reuss, 1846
               11 Subfamily Trachycardiinae Stewart, 1930
               12 Subfamily Tridacninae Lamarck, 1819
               13 Subfamily †Tulongocardiinae Schneider, 1995