1. Subgenus Cardium (Acanthocardium) Römer, 1868 accepted as Acanthocardia J. E. Gray, 1851 (unaccepted > junior objective synonym)
   1. Species Cardium (Acanthocardium) echinatum Linnaeus, 1758 accepted as Acanthocardia echinata (Linnaeus, 1758) (unaccepted > superseded combination)
   2. Species Cardium (Acanthocardium) mucronatum Poli, 1791 accepted as Acanthocardia echinata (Linnaeus, 1758)
   3. Species Cardium (Acanthocardium) novum Coen, 1941 accepted as Acanthocardia echinata (Linnaeus, 1758) (unaccepted > junior subjective synonym)
2. Subgenus Cardium (Cerastoderma) Poli, 1795 accepted as Cerastoderma Poli, 1795 (unaccepted > superseded rank)
   1. Species Cardium (Cerastoderma) edule Linnaeus, 1758 accepted as Cerastoderma edule (Linnaeus, 1758) (unaccepted > superseded combination)
3. Species Cardium aculeatum Linnaeus, 1758 accepted as Acanthocardia aculeata (Linnaeus, 1758) (unaccepted > superseded combination)
4. Species Cardium aquilinum Mittre, 1842 accepted as Parvicardium exiguum (Gmelin, 1791) (unaccepted > junior subjective synonym)
5. Species Cardium arcuatum Montagu, 1803 accepted as Lucinella divaricata (Linnaeus, 1758) (synonym)
6. Species Cardium australe G. B. Sowerby II, 1834 accepted as Fulvia australis (G. B. Sowerby II, 1834) (unaccepted > superseded combination)
7. Species Cardium belgicum De Malzine, 1867 accepted as Cerastoderma edule (Linnaeus, 1758) (unaccepted > junior subjective synonym)
8. Species Cardium belticum Reeve, 1845 accepted as Cerastoderma glaucum (Bruguière, 1789) (unaccepted > junior subjective synonym)
9. Species Cardium boreale Reeve, 1845 accepted as Cardium groenlandicum Mohr, 1786 accepted as Serripes groenlandicus (Mohr, 1786) (unaccepted > junior homonym, non Cardium boreale Broderip & G. B. Sowerby I, 1829)
10. Species Cardium bullatum Locard, 1891 accepted as Acanthocardia echinata (Linnaeus, 1758) (unaccepted > junior homonym, non Cardium bullatum (Linnaeus, 1858) sensu Lamarck, 1819)
11. Species Cardium ciliatum O. Fabricius, 1780 accepted as Ciliatocardium ciliatum (O. Fabricius, 1780) (unaccepted > superseded combination)
12. Species Cardium clodiense Brocchi, 1814 accepted as Cerastoderma glaucum (Bruguière, 1789) (unaccepted > junior subjective synonym)
13. Species Cardium corallinum Linnaeus, 1758 accepted as Mactra corallina (Linnaeus, 1758) (unaccepted > superseded combination)
14. Species Cardium crassum Gmelin, 1791 accepted as Laevicardium crassum (Gmelin, 1791) (original combination)
15. Species Cardium crenulatum Lamarck, 1819 accepted as Cerastoderma edule (Linnaeus, 1758) (unaccepted > junior subjective synonym)
16. Species Cardium darwini Mayer, 1866 accepted as Cardium indicum Lamarck, 1819 accepted as Procardium indicum (Lamarck, 1819) (unnecessary replacement name)
17. Species Cardium deshayesii Payraudeau, 1826 accepted as Acanthocardia deshayesii (Payraudeau, 1826) (unaccepted > superseded combination)
18. Species Cardium duregnei Monterosato, 1891 accepted as Acanthocardia echinata (Linnaeus, 1758) (unaccepted > junior subjective synonym)
19. Species Cardium echinatum Linnaeus, 1758 accepted as Acanthocardia echinata (Linnaeus, 1758) (unaccepted > superseded combination)
20. Species Cardium edentula Montagu, 1808 accepted as Cardium edentulum Montagu, 1808 accepted as Cardium groenlandicum Mohr, 1786 accepted as Serripes groenlandicus (Mohr, 1786) (unaccepted > junior subjective synonym)
21. Species Cardium edentulum Montagu, 1808 accepted as Cardium groenlandicum Mohr, 1786 accepted as Serripes groenlandicus (Mohr, 1786) (unaccepted > junior subjective synonym)
22. Species Cardium edule Linnaeus, 1758 accepted as Cerastoderma edule (Linnaeus, 1758) (unaccepted > superseded combination)
23. Species Cardium eichwaldi Reeve, 1845 accepted as Cerastoderma glaucum (Bruguière, 1789) (synonym)
24. Species Cardium elegantulum Møller, 1842 accepted as Goethemia elegantula (Møller, 1842) (unaccepted > superseded combination)
25. Species Cardium elongatum Montagu, 1803 accepted as Cerastoderma glaucum (Bruguière, 1789) (unaccepted > junior homonym, non Cardium elongatum Bruguière, 1789)
26. Species Cardium erinaceum Lamarck, 1819 accepted as Acanthocardia spinosa ([Lightfoot], 1786) (unaccepted > junior subjective synonym)
27. Species Cardium erinaceus accepted as Cardium erinaceum Lamarck, 1819 accepted as Acanthocardia spinosa ([Lightfoot], 1786) (unaccepted > misspelling - incorrect subsequent spelling, lapsus calami)
28. Species Cardium exiguum Gmelin, 1791 accepted as Parvicardium exiguum (Gmelin, 1791) (unaccepted > superseded combination)
29. Species Cardium fabricii Deshayes, 1855 accepted as Cardium groenlandicum Mohr, 1786 accepted as Serripes groenlandicus (Mohr, 1786) (unaccepted > junior subjective synonym, uncertain synonym)
30. Species Cardium fasciatum Montagu, 1808 accepted as Parvicardium pinnulatum (Conrad, 1831) (unaccepted > junior homonym, non Cardium fasciatum Gmelin, 1791)
31. Species Cardium fasciatum Gmelin, 1791 accepted as Acanthocardia tuberculata (Linnaeus, 1758) (unaccepted > junior subjective synonym)
32. Species Cardium flexuosum Gmelin, 1791 accepted as Acanthocardia echinata (Linnaeus, 1758) (unaccepted > junior subjective synonym)
33. Species Cardium fragile Reeve, 1845 accepted as Cerastoderma glaucum (Bruguière, 1789) (unaccepted > junior homonym, non Cardium fragile Forsskål in Niebuhr, 1775)
34. Species Cardium fragile Forsskål, 1775 accepted as Fulvia fragilis (Forsskål, 1775) (unaccepted > superseded combination)
35. Species Cardium gaditanum Gmelin, 1791 accepted as Glycymeris nummaria (Linnaeus, 1758) (dubious synonym)
36. Species Cardium glaucum Bruguière, 1789 accepted as Cerastoderma glaucum (Bruguière, 1789) (original combination)
37. Species Cardium glaucum Poiret, 1789 accepted as Cerastoderma glaucum (Bruguière, 1789) (unaccepted > junior homonym, non Cardium glaucum Bruguière, 1789)
38. Species Cardium groenlandicum Mohr, 1786 accepted as Serripes groenlandicus (Mohr, 1786) (unaccepted > superseded combination)
39. Species Cardium hauniense G. H. Petersen & P. Russell, 1971 accepted as Parvicardium hauniense (G. H. Petersen & P. Russell, 1971) (unaccepted > superseded combination)
40. Species Cardium helleri Brusina, 1865 accepted as Parvicardium exiguum (Gmelin, 1791) (unaccepted > junior subjective synonym)
41. Species Cardium humanum Linnaeus, 1758 accepted as Glossus humanus (Linnaeus, 1758)
42. Species Cardium hystrix [Lightfoot], 1786 accepted as Acanthocardia echinata (Linnaeus, 1758) (unaccepted > junior subjective synonym)
43. Species Cardium indicum Lamarck, 1819 accepted as Procardium indicum (Lamarck, 1819) (unaccepted > superseded combination)
44. Species Cardium islandicum Bruguière, 1789 accepted as Cardium ciliatum O. Fabricius, 1780 accepted as Ciliatocardium ciliatum (O. Fabricius, 1780) (unaccepted > junior subjective synonym)
45. Species Cardium isthmicum Issel, 1869 accepted as Cerastoderma glaucum (Bruguière, 1789) (unaccepted > junior subjective synonym)
46. Species Cardium lamarcki Reeve, 1845 accepted as Cardium lamarckii Reeve, 1845 accepted as Cerastoderma lamarcki (Reeve, 1845) accepted as Cerastoderma glaucum (Bruguière, 1789) (unaccepted > misspelling - incorrect subsequent spelling)
47. Species Cardium lamarckii Reeve, 1845 accepted as Cerastoderma lamarcki (Reeve, 1845) accepted as Cerastoderma glaucum (Bruguière, 1789) (unaccepted > superseded combination)
48. Species Cardium laticostatum Mayer-Eymar, 1898 † accepted as Cardium paucicostatum G. B. Sowerby II, 1834 accepted as Acanthocardia paucicostata (G. B. Sowerby II, 1834) (unaccepted > junior homonym, non Cardium laticostatum G. B. Sowerby I, 1833)
49. Species Cardium loveni W. Thompson, 1845 accepted as Parvicardium minimum (R. A. Philippi, 1836) accepted as Papillicardium minimum (R. A. Philippi, 1836) (unaccepted > junior subjective synonym)
50. Species Cardium minimum R. A. Philippi, 1836 accepted as Parvicardium minimum (R. A. Philippi, 1836) accepted as Papillicardium minimum (R. A. Philippi, 1836) (unaccepted > superseded combination)
51. Species Cardium mucronatum Poli, 1791 accepted as Acanthocardia echinata (Linnaeus, 1758) (unaccepted > junior subjective synonym)
52. Species Cardium nodosum Montagu, 1803 sensu W. Turton, 1822 accepted as Parvicardium scabrum (R. A. Philippi, 1844) (unaccepted > misapplication)
53. Species Cardium norvegicum Spengler, 1799 accepted as Laevicardium crassum (Gmelin, 1791) (unaccepted > junior subjective synonym)
54. Species Cardium oblongum Gmelin, 1791 accepted as Laevicardium oblongum (Gmelin, 1791) (unaccepted > superseded combination)
55. Species Cardium obsoletum Spengler, 1799 accepted as Laevicardium oblongum (Gmelin, 1791) (unaccepted > junior subjective synonym)
56. Species Cardium obtritum Locard, 1886 accepted as Cerastoderma edule (Linnaeus, 1758) (unaccepted > junior subjective synonym)
57. Species Cardium ovale G. B. Sowerby II, 1840 accepted as Cerastoderma glaucum (Bruguière, 1789) (unaccepted > junior subjective synonym)
58. Species Cardium papillosum Poli, 1791 accepted as Papillicardium papillosum (Poli, 1791) (unaccepted > superseded combination)
59. Species Cardium parasitum O. G. Costa, 1839 accepted as Parvicardium subangulatum (Scacchi, 1833) (unaccepted > junior subjective synonym)
60. Species Cardium parvum R. A. Philippi, 1844 accepted as Parvicardium exiguum (Gmelin, 1791) (unaccepted > junior homonym, junior homonym of Cardium parvum Da Costa, 1778, C. parvum Mawe, 1823, and C. parvum G. B. Sowerby II, 1839)
61. Species Cardium paucicostatum G. B. Sowerby II, 1834 accepted as Acanthocardia paucicostata (G. B. Sowerby II, 1834) (unaccepted > superseded combination)
62. Species Cardium pennanti Reeve, 1844 accepted as Laevicardium crassum (Gmelin, 1791) (synonym)
63. Species Cardium perrieri Dautzenberg & H. Fischer, 1897 accepted as Parvicardium minimum (R. A. Philippi, 1836) accepted as Papillicardium minimum (R. A. Philippi, 1836) (unaccepted > junior subjective synonym)
64. Species Cardium pinnulatum Conrad, 1831 accepted as Parvicardium pinnulatum (Conrad, 1831) (unaccepted > superseded combination)
65. Species Cardium polii Payraudeau, 1826 accepted as Papillicardium papillosum (Poli, 1791) (unnecessary replacement name for Cardium papillosum Poli, 1791)
66. Species Cardium politum Risso, 1826 accepted as Laevicardium crassum (Gmelin, 1791) (unaccepted > junior homonym, non Cardium politum Spengler, 1799; dubious synonym)
67. Species Cardium punctatum Brocchi, 1814 † accepted as Papillicardium papillosum (Poli, 1791) (unaccepted > junior subjective synonym)
68. Species Cardium pygmaeum Donovan, 1800 accepted as Parvicardium exiguum (Gmelin, 1791) (unaccepted > junior subjective synonym)
69. Species Cardium richardi Audouin, 1826 accepted as Afrocardium richardi (Audouin, 1826) (unaccepted > superseded combination)
70. Species Cardium roseum Lamarck, 1819 accepted as Parvicardium scabrum (R. A. Philippi, 1844) (unaccepted > junior homonym, non Cardium roseum Gmelin, 1791)
71. Species Cardium rubrum Montagu, 1803 accepted as Lasaea rubra (Montagu, 1803)
72. Species Cardium rusticum Linnaeus, 1758 accepted as Cardium tuberculatum Linnaeus, 1758 accepted as Acanthocardia tuberculata (Linnaeus, 1758) (unaccepted > junior subjective synonym)
73. Species Cardium scabrum R. A. Philippi, 1844 accepted as Parvicardium scabrum (R. A. Philippi, 1844) (unaccepted > superseded combination)
74. Species Cardium scobinatum Lamarck, 1819 accepted as Papillicardium papillosum (Poli, 1791) (unaccepted > junior subjective synonym, dubious synonym)
75. Species Cardium siculum G. B. Sowerby II, 1834 accepted as Parvicardium subangulatum (Scacchi, 1833) (unaccepted > junior subjective synonym, uncertain synonym)
76. Species Cardium simile Milaschewitsch, 1909 accepted as Papillicardium simile (Milaschewitsch, 1909) (unaccepted > superseded combination)
77. Species Cardium solidum Linnaeus, 1758 accepted as Spisula solida (Linnaeus, 1758) (original combination)
78. Species Cardium spinosum [Lightfoot], 1786 accepted as Acanthocardia spinosa ([Lightfoot], 1786) (unaccepted > superseded combination)
79. Species Cardium stellatum Reeve, 1845 accepted as Parvicardium subangulatum (Scacchi, 1833) (unaccepted > junior subjective synonym)
80. Species Cardium striatum Spengler, 1799 accepted as Cardium australe G. B. Sowerby II, 1834 accepted as Fulvia australis (G. B. Sowerby II, 1834) (unaccepted > nomen oblitum)
81. Species Cardium stultorum Linnaeus, 1758 accepted as Mactra stultorum (Linnaeus, 1758) (original combination)
82. Species Cardium subangulatum Scacchi, 1833 accepted as Parvicardium subangulatum (Scacchi, 1833) (unaccepted > superseded combination)
83. Species Cardium suecicum Lovén, 1846 accepted as Parvicardium minimum (R. A. Philippi, 1836) accepted as Papillicardium minimum (R. A. Philippi, 1836) (unaccepted > junior subjective synonym)
84. Species Cardium suediense Reeve, 1845 accepted as Parvicardium minimum (R. A. Philippi, 1836) accepted as Papillicardium minimum (R. A. Philippi, 1836) (unaccepted > junior subjective synonym)
85. Species Cardium sulcatum Lamarck, 1819 accepted as Laevicardium oblongum (Gmelin, 1791) (unaccepted > junior subjective synonym)
86. Species Cardium transversale Deshayes, 1855 accepted as Parvicardium vroomi van Aartsen, Menkhorst & E. Gittenberger, 1984 (unaccepted > junior homonym, non Cardium transversale Römer, 1849)
87. Species Cardium tuberculare G. B. Sowerby I, 1831 accepted as Acanthocardia tuberculata (Linnaeus, 1758) (unaccepted > junior subjective synonym)
88. Species Cardium tuberculatum Linnaeus, 1758 accepted as Acanthocardia tuberculata (Linnaeus, 1758) (unaccepted > superseded combination)
89. Species Cardium umbonatum S. V. Wood, 1853 accepted as Cerastoderma glaucum (Bruguière, 1789) (unaccepted > junior homonym, non Cardium umbonatum J. Sowerby, 1817)
90. Species Cardium vitellinum Reeve, 1844 accepted as Laevicardium crassum (Gmelin, 1791) (unaccepted > junior subjective synonym)
91. Species Cardium vulgare da Costa, 1778 accepted as Cerastoderma edule (Linnaeus, 1758) (unaccepted > junior subjective synonym)
92. Species Cardium ciliare Linnaeus, 1758 (uncertain > nomen dubium)

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