1. Genus Aktschagylia Starobogatov, 1970 †
2. Genus Aliomactra Stephenson, 1952 †
3. Genus Andrussella Korobkov, 1954 †
4. Genus Avimactra Andrusov, 1905 †
5. Genus Caspimactra A. A. Ali-Zade & Kabakova, 1969 †
6. Genus Chersonimactra Paramonova, 1978 †
7. Genus Cryptomactra Andrussow, 1902 †
8. Genus Cymbophora Gabb, 1869 †
9. Subfamily Darininae Signorelli, 2011
   1. Genus Darcinia Clark, 1946 †
10. Genus Eopapyrina Woodring, 1982 †
11. Genus Geltena Stephenson, 1946 †
12. Genus Ionesimactra Signorelli, 2023 †
13. Genus Kirghizella Andrusov, 1902 †
14. Subfamily Lutrariinae Gray, 1853
    1. Genus Darina Gray, 1853
    2. Genus Eastonia J. E. Gray, 1853
    3. Genus Heterocardia Deshayes, 1855
    4. Genus Lutraria Lamarck, 1799
    5. Genus Meropesta Iredale, 1929
    6. Genus Standella J. E. Gray, 1853
    7. Genus Tresus J. E. Gray, 1853
    8. Genus Zenatia J. E. Gray, 1853
    9. Genus Zenatina Gill & Darragh, 1963
15. Subfamily Mactrinae Lamarck, 1809
    1. Genus Allomactra Tomlin, 1931 †
    2. Genus Austromactra Iredale, 1930
    3. Genus Barymactra Cossmann, 1909
    4. Genus Coelomactra Dall, 1895
    5. Genus Crassula Marwick, 1948
    6. Genus Cyclomactra Dall, 1895
    7. Genus Diaphoromactra Iredale, 1930
    8. Genus Harvella J. E. Gray, 1853
    9. Genus Huberimactra Cosel & Gofas, 2018
    10. Genus Leptospisula Dall, 1895
    11. Genus Mactra Linnaeus, 1767
    12. Genus Mactrella J. E. Gray, 1853
    13. Genus Mactrellona J. G. Marks, 1951
    14. Genus Mactrinula J. E. Gray, 1853
    15. Genus Mactromeris Conrad, 1868
    16. Genus Mactrotoma Dall, 1894
    17. Genus Maorimactra H. J. Finlay, 1928
    18. Genus Mulinia J. E. Gray, 1837
    19. Genus Oxyperas Mörch, 1853
    20. Genus Pseudocardium Gabb, 1866 †
    21. Genus Rangia Desmoulins, 1832
    22. Genus Sarmatimactra Korobkov, 1954 †
    23. Genus Scalpomactra H. J. Finlay, 1928
    24. Genus Scissodesma Gray, 1837
    25. Genus Simomactra Dall, 1894
    26. Genus Spisula J. E. Gray, 1837
    27. Genus Trinitasia Maury, 1928
    28. Genus Tumbeziconcha Pilsbry & Olsson, 1935
    29. Genus Spissula [sic] accepted as Spisula J. E. Gray, 1837 (unaccepted > misspelling - incorrect subsequent spelling)
16. Genus Mactrodesma Conrad, 1869 †
17. Genus Mactrona Marwick, 1952
18. Genus Mulinoides Olsson, 1944 †
19. Genus Nelltia Stephenson, 1952 †
20. Genus Nymphactra Stilwell & Zinsmeister, 1992 †
21. Genus Ovamactra Woodring, 1982 †
22. Genus Petromactra Saul, 1973
23. Genus Planimactra Ionesi, 1986 †
24. Genus Podolimactra Ionesi, 1986 †
25. Genus Praerangia Cossmann, 1908 †
26. Genus Priscomactra Stephenson, 1952 †
27. Genus Pseudomactra Steklov, 1960 †
28. Genus Pteroluter Saul, 1973 †
29. Subfamily Resaniinae Marwick, 1931
    1. Genus Resania J. E. Gray, 1853
30. Genus Stereomactra Stewart, 1930 †
31. Genus Stiphromactra Böhm, 1929 †
32. Subfamily Tanysiphoninae Scarlato & Starobogatov, 1971
    1. Genus Tanysiphon W. H. Benson, 1858
33. Genus Tenuimactra Garvie, 1996 †
34. Genus Willimactra Saul, 1973 †
35. Genus Zenatiopsis Tate, 1880 †
36. Genus Coleomactra [sic] accepted as Coelomactra Dall, 1895 (misspelling)
37. Genus Colorimactra Iredale, 1929 accepted as Mactra Linnaeus, 1767
38. Genus Cryptodon Conrad, 1837 accepted as Tresus J. E. Gray, 1853 (invalid: junior homonym of Cryptodon Turton, 1822; Schizothaerus is a replacement name)
39. Genus Deikea Mayer-Eymar, 1872 accepted as Mactra Linnaeus, 1767 (synonym)
40. Genus Electomactra Iredale, 1930 accepted as Standella J. E. Gray, 1853
41. Genus Gnathodon G. B. Sowerby I, 1832 accepted as Rangia Desmoulins, 1832 (synonym)
42. Genus Hemimactra Swainson, 1840 accepted as Spisula (Hemimactra) Swainson, 1840 represented as Spisula J. E. Gray, 1837
43. Genus Heteromactra Cossmann, 1909 † accepted as Allomactra Tomlin, 1931 † (unaccepted > junior homonym)
44. Genus Laminaria Mayer, 1867 accepted as Resania J. E. Gray, 1853 (synonym)
45. Genus Longimactra H. J. Finlay, 1928 accepted as Oxyperas Mörch, 1853 (synonym)
46. Genus Mactrula Marwick, 1948 accepted as Pseudocardium Gabb, 1866 † (synonym)
47. Genus Merope H. Adams & A. Adams, 1856 accepted as Meropesta Iredale, 1929 (invalid: junior homonym of Merope Newman, 1838)
48. Genus Micromactra Dall, 1894 accepted as Mactrotoma Dall, 1894 (unaccepted > junior subjective synonym)
49. Genus Myomactra Mayer, 1867 accepted as Resania J. E. Gray, 1853 (synonym)
50. Genus Nannomactra Iredale, 1930 accepted as Mactra (Nannomactra) Iredale, 1930 represented as Mactra Linnaeus, 1767
51. Genus Notospisula Iredale, 1930 accepted as Spisula J. E. Gray, 1837
52. Genus Psammophila T. Brown, 1827 accepted as Lutraria (Psammophila) T. Brown, 1827 represented as Lutraria Lamarck, 1799 (unaccepted > superseded rank)
53. Genus Pseudoxyperas Sacco, 1901 accepted as Oxyperas Mörch, 1853 (synonym)
54. Genus Rangianella Conrad, 1868 accepted as Rangia (Rangianella) Conrad, 1868 represented as Rangia Desmoulins, 1832
55. Genus Schizodesma of Gray, 1838 accepted as Scissodesma Gray, 1837 (incorrect subsequent spelling)
56. Genus Schizothaerus Conrad, 1853 accepted as Tresus J. E. Gray, 1853 (synonym)
57. Genus Spisulina P. Fischer, 1887 accepted as Spisula J. E. Gray, 1837 (unaccepted > unjustified emendation, An unnecessary substitute name for "Spisula H. & A. Adams, 1856, non Gray, 1837")
58. Genus Spisulona Marwick, 1948 † accepted as Spisula (Spisulona) Marwick, 1948 represented as Spisula J. E. Gray, 1837
59. Genus Standella Gray, 1853 sensu H. Adams & A. Adams, 1856 accepted as Leptospisula Dall, 1895 (misapplication)
60. Genus Symmorphomactra Dall, 1894 accepted as Simomactra Dall, 1894 (unaccepted > junior subjective synonym)
61. Genus Telemactra Iredale, 1929 accepted as Mactra Linnaeus, 1767 (synonym)
62. Genus Trigonella da Costa, 1778 accepted as Mactra Linnaeus, 1767 (synonym)
63. Genus Vanganella J. E. Gray, 1853 accepted as Resania J. E. Gray, 1853 (unaccepted > junior subjective synonym)
64. Subfamily Zenatiinae Dall, 1895 accepted as Lutrariinae Gray, 1853 (unaccepted > junior subjective synonym)
65. Genus Zenatraria Beu, 1966 accepted as Lutraria (Psammophila) T. Brown, 1827 represented as Lutraria Lamarck, 1799 (unaccepted > junior subjective synonym)
66. Genus Leptomactra Ward, 1992 † (uncertain > unassessed)

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