1. Subfamily Cardiinae Lamarck, 1809
   1. Genus Bucardium J. E. Gray, 1853
   2. Genus Cardium Linnaeus, 1758
   3. Genus Europicardium S. V. Popov, 1977
   4. Genus Fulvia J. E. Gray, 1853
   5. Genus Procardium ter Poorten & La Perna, 2017
   6. Genus Vepricardium Iredale, 1929
   7. Genus Acanthocardium Römer, 1868 accepted as Acanthocardia J. E. Gray, 1851 (unaccepted > junior objective synonym)
   8. Genus Acanthocardium E. Römer, 1868 accepted as Acanthocardia J. E. Gray, 1851 (unaccepted > unjustified emendation)
   9. Genus Eucardium P. Fischer, 1887 accepted as Acanthocardia J. E. Gray, 1851 (Junior synonym of Acanthocardia J.E. Gray, 1851)
   10. Genus Orbis Blainville, 1825 accepted as Acanthocardia J. E. Gray, 1851 (not available: not used as a valid name; and also invalid: junior homonym of Orbis Müller, 1767)
   11. Genus Pectunculus Mörch, 1853 accepted as Vepricardium Iredale, 1929 (unaccepted > junior homonym, invalid: non Lamarck, 1799 nec da Costa, 1778)
   12. Genus Rudicardia Coen, 1915 accepted as Acanthocardia J. E. Gray, 1851 (synonym)
2. Subfamily Clinocardiinae Kafanov, 1975
   1. Genus Ciliatocardium Kafanov, 1974
   2. Genus Clinocardium Keen, 1936
   3. Genus Keenocardium Kafanov, 1974
   4. Genus Serripes A. Gould, 1841
   5. Genus Aphrodite I. Lea, 1834 accepted as Serripes A. Gould, 1841
3. Subfamily Fraginae R. B. Stewart, 1930
   1. Genus Americardia R. B. Stewart, 1930
   2. Genus Apiocardia Olsson, 1961
   3. Genus Corculum Röding, 1798
   4. Genus Ctenocardia H. Adams & A. Adams, 1857
   5. Genus Fragum Röding, 1798
   6. Genus Lunulicardia J. E. Gray, 1853
   7. Genus Microfragum T. Habe, 1951
   8. Genus Trigoniocardia Dall, 1900
   9. Genus Cardissa Megerle von Mühlfeld, 1811 accepted as Corculum Röding, 1798
   10. Genus Hemicardia Spengler, 1799 accepted as Lunulicardia J. E. Gray, 1853 (invalidly proposed)
   11. Genus Hemicardium Schweigger, 1820 accepted as Corculum Röding, 1798 (unaccepted > junior objective synonym)
   12. Genus Opisocardium Bayle, 1879 accepted as Lunulicardia J. E. Gray, 1853 (unaccepted > junior objective synonym)
4. Subfamily Laevicardiinae Keen, 1951
   1. Genus Dinocardium Dall, 1900
   2. Genus Laevicardium Swainson, 1840
   3. Genus Pseudofulvia J. Vidal & Kirkendale, 2007
   4. Genus Levicardium [sic] accepted as Laevicardium Swainson, 1840 (unaccepted > misspelling, incorrect spelling of genus name)
   5. Genus Liocardium Agassiz, 1847 accepted as Laevicardium Swainson, 1840 (unjustified emmendation for Laevicardium Swainson, 1840)
5. Subfamily Lymnocardiinae Stoliczka, 1870
   1. Tribe Acanthocardiini Kafanov & Starobogatov, 1977
      1. Genus Acanthocardia J. E. Gray, 1851
   2. Tribe Adacnini Gill, 1871
      1. Genus Adacna Eichwald, 1838
      2. Genus Didacna Eichwald, 1838
      3. Genus Hypanis Ménétries, 1832
      4. Genus Monodacna Eichwald, 1838
      5. Genus Adachna [sic] accepted as Adacna Eichwald, 1838 (unaccepted > misspelling)
      6. Genus Neoadacna A. A. Ali-Zade, 1973 accepted as Adacna Eichwald, 1838 (unaccepted > junior objective synonym)
      7. Genus Neomonodacna A. A. Ali-Zade, 1973 accepted as Monodacna Eichwald, 1838 (junior objective synonym)
   3. Tribe Cerastodermatini F. Nordsieck, 1969
      1. Genus Cerastoderma Poli, 1795
   4. Tribe Parvicardiini Kafanov & Starobogatov, 1977
      1. Genus Papillicardium Sacco, 1899
      2. Genus Parvicardium Monterosato, 1884
      3. Genus Balticardium Lambiotte, 1979 accepted as Parvicardium Monterosato, 1884 (unaccepted > junior subjective synonym)
      4. Genus Cerastobyssum G. H. Petersen & P. Russell, 1974 accepted as Parvicardium Monterosato, 1884 (unaccepted > junior subjective synonym)
6. Subfamily Nemocardiinae ter Poorten, 2023
   1. Genus Frigidocardium T. Habe, 1951
   2. Genus Keenaea T. Habe, 1951
   3. Genus Lophocardium P. Fischer, 1887
   4. Genus Microcardium Keen, 1937
   5. Genus Nemocardium Meek, 1876
   6. Genus Pratulum Iredale, 1924
   7. Genus Decussicardium Fischer-Piette, 1977 accepted as Microcardium Keen, 1937 (unaccepted > unavailable name, no description)
   8. Genus Trifaricardium Kuroda & T. Habe, 1951 accepted as Frigidocardium T. Habe, 1951 (unaccepted > junior subjective synonym)
7. Subfamily Orthocardiinae J. A. Schneider, 2002
   1. Genus Afrocardium Tomlin, 1931
   2. Genus Freneixicardia J. A. Schneider, 2002
   3. Genus Lyrocardium Meek, 1876
8. Subfamily Trachycardiinae R. B. Stewart, 1930
   1. Genus Acrosterigma Dall, 1900
   2. Genus Dallocardia R. B. Stewart, 1930
   3. Genus Papyridea Swainson, 1840
   4. Genus Trachycardium Mörch, 1853
   5. Genus Vasticardium Iredale, 1927
   6. Genus Cochlea Martyn, 1786 accepted as Vasticardium Iredale, 1927 (Unavailable: published in a work placed by ICZN on Official Index)
   7. Genus Regozara Iredale, 1936 accepted as Vasticardium Iredale, 1927
9. Subfamily Tridacninae Lamarck, 1819
   1. Genus Hippopus Lamarck, 1799
   2. Genus Tridacna Bruguière, 1797
   3. Genus Cerceis Gistel, 1848 accepted as Hippopus Lamarck, 1799 (Replacement name for Hippopus Lamarck, 1799. Invalid: junior homonym of Cerceis Milne Edwards, 1840)
   4. Genus Dinodacna Iredale, 1937 accepted as Tridacna Bruguière, 1797 (unaccepted > junior subjective synonym)
   5. Genus Flodacna Iredale, 1937 accepted as Tridacna Bruguière, 1797 (unaccepted > junior subjective synonym)
   6. Genus Persikima Iredale, 1937 accepted as Tridacna (Persikima) Iredale, 1937 represented as Tridacna Bruguière, 1797
   7. Genus Sepidacna Iredale, 1937 accepted as Tridacna Bruguière, 1797
   8. Genus Tridachnes Röding, 1798 accepted as Tridacna Bruguière, 1797
   9. Genus Tridacne Link, 1807 accepted as Tridacna Bruguière, 1797 (unaccepted > misspelling, Incorrect subsequent spelling.)
   10. Genus Vulgodacna Iredale, 1937 accepted as Tridacna Bruguière, 1797 (unaccepted > junior subjective synonym)
10. Genus Cerastes Poli, 1795 accepted as Cardium (Cerastoderma) Poli, 1795 accepted as Cerastoderma Poli, 1795 (unaccepted > junior homonym, Invalid: a junior homonym of Cerastes Laurenti, 1768 [Reptilia])
11. Genus Trigonocardia [sic] accepted as Trigoniocardia Dall, 1900 (unaccepted > misspelling)
12. Subfamily [unassigned] Cardiidae (temporary name)
    1. Genus Discors Deshayes, 1858
    2. Genus Goethemia Lambiotte, 1979
    3. Genus Maoricardium Marwick, 1944

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