1. Subfamily Arcuatulinae Scarlato & Starobogatov, 1979
   1. Genus Arcuatula Jousseaume, 1919
   2. Genus Mytella Soot-Ryen, 1955
   3. Genus Parabrachidontes K. S. Tan, S. H. M. Tan, Sanpanich, Duangdee & Ambarwati, 2024
   4. Genus Musculista G. Yamamoto & Habe, 1958 accepted as Arcuatula Jousseaume, 1919 (unaccepted > junior subjective synonym)
2. Subfamily Bathymodiolinae Kenk & B. R. Wilson, 1985
   1. Genus Adipicola Dautzenberg, 1927
   2. Genus Bathymodiolus Kenk & B. R. Wilson, 1985
   3. Genus Benthomodiolus Dell, 1987
   4. Genus Gigantidas Cosel & B. A. Marshall, 2003
   5. Genus Idas Jeffreys, 1876
   6. Genus Nypamodiolus Y.-T. Lin, Kiel, T. Xu & J.-W. Qiu, 2022
   7. Genus Tamu Gustafson, R. D. Turner, Lutz & Vrijenhoek, 1998
   8. Genus Terua Dall, Bartsch & Rehder, 1938
   9. Genus Vadumodiolus Altamia, Appiah-Madson, Falco-Poulin, Huettel, Rubin-Blum, Dubilier, Gruber-Vodicka, Leisch & Distel, 2024
   10. Genus Vulcanidas Cosel & B. A. Marshall, 2010
3. Subfamily Brachidontinae F. Nordsieck, 1969
   1. Genus Brachidontes Swainson, 1840
   2. Genus Geukensia Van de Poel, 1959
   3. Genus Ischadium Jukes-Browne, 1905
   4. Genus Mytilaster Monterosato, 1883
   5. Genus Perumytilus Olsson, 1961
   6. Genus Austromytilus Laseron, 1956 accepted as Brachidontes Swainson, 1840 (synonym)
   7. Genus Brachiodontes accepted as Brachidontes Swainson, 1840 (unaccepted > misspelling - incorrect subsequent spelling)
   8. Genus Brachyodon Jukes-Browne, 1905 accepted as Brachidontes Swainson, 1840 (unaccepted > unavailable name)
   9. Genus Hormomya Mörch, 1853 accepted as Brachidontes Swainson, 1840 (synonym)
   10. Genus Scolimytilus Olsson, 1961 accepted as Brachidontes Swainson, 1840 (synonym)
4. Subfamily Crenellinae Gray, 1840
   1. Genus Arcoperna Conrad, 1865 †
   2. Genus Arvella Scarlato, 1960
   3. Genus Crenella T. Brown, 1827
   4. Genus Exosiperna Iredale, 1929
   5. Genus Rhomboidella Monterosato, 1884
   6. Genus Semimodiola Cossmann, 1887 †
   7. Genus Solamen Iredale, 1924
   8. Genus Vilasina Scarlato, 1960
   9. Genus Nuculocardia A. d'Orbigny, 1853 accepted as Crenella T. Brown, 1827 (synonym)
   10. Genus Stalagmium Conrad, 1833 † accepted as Crenella T. Brown, 1827 (unaccepted > junior subjective synonym)
5. Genus Cuneolus Stephenson, 1941 †
6. Subfamily Dacrydiinae Ockelmann, 1983
   1. Genus Dacrydium Torell, 1859
   2. Genus Dacridium [sic] accepted as Dacrydium Torell, 1859 (unaccepted > misspelling - incorrect subsequent spelling)
7. Genus Limnolycettia C. M. Kolesnikov, 1980 †
8. Subfamily Lithophaginae H. Adams & A. Adams, 1857
   1. Genus Adula H. Adams & A. Adams, 1857
   2. Genus Botula Mörch, 1853
   3. Genus Fungiacava Soot-Ryen, 1969
   4. Genus Leiosolenus P. P. Carpenter, 1857
   5. Genus Lithophaga Röding, 1798
   6. Genus Zelithophaga H. J. Finlay, 1926
   7. Genus Dactylus Mörch, 1861 accepted as Leiosolenus (Labis) Dall, 1916 represented as Leiosolenus P. P. Carpenter, 1857
   8. Genus Doliolabis Iredale, 1939 accepted as Leiosolenus (Labis) Dall, 1916 represented as Leiosolenus P. P. Carpenter, 1857
   9. Genus Exodiberus Iredale, 1939 accepted as Leiosolenus (Diberus) Dall, 1898 represented as Leiosolenus P. P. Carpenter, 1857
   10. Genus Lithodomus Cuvier, 1816 accepted as Lithophaga Röding, 1798 (unaccepted > junior subjective synonym)
   11. Genus Lithophagus [sic] accepted as Lithophaga Röding, 1798 (incorrect subsequent spelling)
   12. Genus Lythodomus accepted as Lithophaga Röding, 1798 (unaccepted > misspelling - incorrect subsequent spelling, of Lithodomus Cuvier, 1816)
   13. Genus Myapalmula Iredale, 1939 accepted as Leiosolenus P. P. Carpenter, 1857
   14. Genus Myoforceps P. Fischer, 1886 accepted as Leiosolenus (Myoforceps) P. Fischer, 1886 represented as Leiosolenus P. P. Carpenter, 1857
   15. Genus Stumpiella Soot-Ryen, 1955 accepted as Leiosolenus (Stumpiella) Soot-Ryen, 1955 represented as Leiosolenus P. P. Carpenter, 1857
9. Genus Mauricia G. D. Harris, 1919 †
10. Subfamily Modiolinae G. Termier & H. Termier, 1950
    1. Genus Arenifodiens B. R. Wilson, 2006
    2. Genus Jolya Bourguignat, 1877
    3. Genus Lioberus Dall, 1898
    4. Genus Modiolatus Jousseaume, 1893
    5. Genus Modiolula Sacco, 1898
    6. Genus Modiolus Lamarck, 1799
    7. Genus Stavelia Gray, 1858
    8. Genus Tamarindiformis Kuroda, 1931 accepted as Modiolus Lamarck, 1799 (unaccepted > unavailable name)
    9. Genus Gibbomodiola Sacco, 1898 (uncertain > taxon inquirendum)
11. Subfamily Musculinae Iredale, 1939
    1. Genus Gregariella Monterosato, 1883
    2. Genus Musculus Röding, 1798
    3. Genus Paramusculus Kadolsky, 1989 †
    4. Genus Botulina Dall, 1889 accepted as Gregariella Monterosato, 1883 (synonym)
12. Genus Mysidioptera Salomon, 1895 †
13. Subfamily Mytilinae Rafinesque, 1815
    1. Genus Aulacomya Mörch, 1853
    2. Genus Byssogerdius K.-S. Tan, S. H-N. Tan, Sanpanich, Duangdee & Ambarwati, 2021
    3. Genus Choromytilus Soot-Ryen, 1952
    4. Genus Crenomytilus Soot-Ryen, 1955
    5. Genus Mytilus Linnaeus, 1758
    6. Genus Perna Philipsson, 1788
    7. Genus Praemytilus F. W. Anderson & L. R. Cox, 1948 †
    8. Genus Semimytilus Soot-Ryen, 1955
    9. Genus Mitylus accepted as Mytilus Linnaeus, 1758 (unaccepted > misspelling - incorrect subsequent spelling, incorrect subsequent spelling)
    10. Genus Mytilites [sic] † accepted as Mytulites Schlotheim, 1813 † accepted as Mytilus Linnaeus, 1758 (unaccepted > misspelling - incorrect subsequent spelling)
    11. Genus Mytulites Schlotheim, 1813 † accepted as Mytilus Linnaeus, 1758 (unaccepted > unavailable name, ICZN Art. 20 discarding names formed with suffix "-ites" to denote fossils)
    12. Genus Mytulus [sic] accepted as Mytilus Linnaeus, 1758 (incorrect subsequent spelling)
    13. Genus Plicatomytilus Allison & Addicott, 1976 † accepted as Mytilus (Plicatomytilus) Allison & Addicott, 1976 † represented as Mytilus Linnaeus, 1758 (new rank)
14. Subfamily Mytiliseptinae B. Morton, 2020
    1. Genus Mytilisepta Habe, 1951
15. Genus Mytilosootus Stilwell & Zinsmeister, 1992 †
16. Genus Rhynchomytilus Rollier, 1914 †
17. Subfamily Septiferinae Scarlato & Starobogatov, 1979
    1. Genus Ciboticola Iredale, 1939
    2. Genus Septifer Récluz, 1848
    3. Genus Sinomytilus Thiele, 1934
    4. Genus Trichomya Ihering, 1900
18. Subfamily Xenomytilinae Squires & Saul, 2006 †
    1. Genus Lycettia L. R. Cox, 1937 †
    2. Genus Xenomytilus Squires & Saul, 2006 †
19. Subfamily Xenostrobinae K. S. Tan, S. H. M. Tan, K. Sanpanich, T. Duangdee & R. Ambarwati, 2022
    1. Genus Vignadula Kuroda & Habe, 1971
    2. Genus Xenostrobus B. R. Wilson, 1967
20. Subfamily Adulinae Scarlato & Starobogatov, 1979 accepted as Lithophaginae H. Adams & A. Adams, 1857
21. Subfamily Botulinae Scarlato & Starobogatov, 1979 accepted as Lithophaginae H. Adams & A. Adams, 1857
22. Genus Botulopa Iredale, 1939 accepted as Botula Mörch, 1853 (synonym)
23. Genus Brachydontes [sic] accepted as Brachidontes Swainson, 1840 (unaccepted > misspelling - incorrect original spelling, misspelling by J. E. Gray, 1847)
24. Genus Brachyodontes Herrmannsen, 1846 accepted as Brachidontes Swainson, 1840 (unaccepted > unjustified emendation)
25. Genus Callitriche Poli, 1791 accepted as Gibbomodiola Sacco, 1898
26. Genus Chloromytilus [sic] accepted as Choromytilus Soot-Ryen, 1952 (misspelling)
27. Genus Crassimytilus Scarlato & Starobogatov, 1979 accepted as Mytilus Linnaeus, 1758 (synonym)
28. Genus Dentimodiolus Iredale, 1939 accepted as Brachidontes Swainson, 1840 (unaccepted > junior subjective synonym)
29. Genus Eumytilus Ihering, 1900 accepted as Mytilus Linnaeus, 1758 (junior objective synonym of Mytilus)
30. Genus Fulgida Jousseaume, 1919 accepted as Lioberus Dall, 1898 (unaccepted > junior subjective synonym)
31. Genus Habepegris F. R. Bernard, 1978 accepted as Idas Jeffreys, 1876 (junior subjective synonym)
32. Genus Hippagus I. Lea, 1833 accepted as Crenella T. Brown, 1827 (unaccepted > junior subjective synonym)
33. Genus Idasola Iredale, 1915 accepted as Idas Jeffreys, 1876 (Unnecessary replacement name for Idas Jeffreys, 1876)
34. Genus Lamya Soot-Ryen, 1958 accepted as Arcuatula Jousseaume, 1919 (synonym)
35. Genus Lanistes Swainson, 1840 accepted as Musculus Röding, 1798 (synonym)
36. Genus Lanistina Gray, 1847 accepted as Musculus Röding, 1798 (synonym)
37. Subfamily Limnoperninae Scarlato & Starobogatov, 1979 accepted as Arcuatulinae Scarlato & Starobogatov, 1979
    1. Genus Limnoperna Rochebrune, 1882
38. Subfamily Lithodominae Gray, 1854 accepted as Lithophaginae H. Adams & A. Adams, 1857
39. Genus Megacrenella Habe & Ki. Ito, 1965 accepted as Solamen Iredale, 1924 (synonym)
40. Genus Miridas Iredale, 1939 accepted as Idas Jeffreys, 1876 (synonym)
41. Genus Modiella Monterosato, 1884 accepted as Amygdalum Megerle von Mühlfeld, 1811 (synonym)
42. Genus Modiola Lamarck, 1801 accepted as Modiolus Lamarck, 1799 (an incorrect subsequent spelling of Modiolus Lamarck, 1799)
43. Genus Modiolarca J. E. Gray, 1842 accepted as Musculus (Modiolarca) J. E. Gray, 1842 represented as Musculus Röding, 1798 (unaccepted > superseded rank)
44. Genus Modiolaria Lovén, 1846 accepted as Musculus Röding, 1798 (unaccepted > junior subjective synonym)
45. Genus Myoparo I. Lea, 1833 accepted as Crenella T. Brown, 1827 (unaccepted > junior subjective synonym)
46. Genus Myrina H. Adams & A. Adams, 1854 accepted as Adipicola Dautzenberg, 1927 (Invalid: junior homonym of Myrina Fabricius, 1807 [Lepidoptera]; Adipicola is a replacement name)
47. Subfamily Mytiliseptiferinae accepted as Mytiliseptinae B. Morton, 2020 (incorrectly formed name)
48. Genus Mytilodonta Coen, 1935 accepted as Mytilaster Monterosato, 1883
49. Genus Notobotula C. A. Fleming, 1959 accepted as Modiolula Sacco, 1898
50. Genus Nudiola Monterosato, 1917 accepted as Gibbomodiola Sacco, 1898 (synonym)
51. Genus Pacifimytilus Kafanov, 1984 accepted as Mytilus Linnaeus, 1758 (synonym)
52. Subfamily Perninae Scarlato & Starobogatov, 1979 accepted as Mytilinae Rafinesque, 1815
53. Genus Propetilus Iredale, 1937 accepted as Gregariella Monterosato, 1883 (synonym)
54. Genus Quendreda Soot-Ryen, 1955 accepted as Dacrydium (Quendreda) Soot-Ryen, 1955 accepted as Dacrydium Torell, 1859 (synonym)
55. Genus Ryenella C. A. Fleming, 1959 accepted as Musculus (Modiolarca) J. E. Gray, 1842 represented as Musculus Röding, 1798
56. Genus Tibialectus Iredale, 1939 accepted as Gregariella Monterosato, 1883 (synonym)
57. Genus Trichomusculus Iredale, 1924 accepted as Gregariella Monterosato, 1883 (unaccepted > junior subjective synonym)
58. Genus Volsella Scopoli, 1777 accepted as Modiolus Lamarck, 1799 (invalid: suppressed by ICZN Opinion325)
59. Subfamily Mytilidae incertae sedis (temporary name)
    1. Genus Admytilus Berezovsky, 2015 †
    2. Genus Amygdalum Megerle von Mühlfeld, 1811
    3. Genus Arcomytilus Agassiz, 1842 †
    4. Genus Assytilus Berezovsky, 2015 †
    5. Genus Inoperna Conrad, 1873 †
    6. Genus Porubites Řehoř, 1966 †
    7. Genus Promytilus Newell, 1942 †
    8. Genus Regulifer Fürsich & Werner, 1988 †
    9. Genus Samiolus Kiel & Taviani, 2017 †
    10. Genus Urumella Hayami & Kase, 1993
    11. Genus Volsellina Newell, 1942 †
    12. Genus Retites Řehoř, 1965 † accepted as Porubites Řehoř, 1966 † (unaccepted > junior homonym, junior homonym of Retites McCaleb, 1964 [Cephalopoda]; Porubites is a replacement name)
60. Genus Lecompteus Van de Poel, 1959 † (uncertain > unassessed)

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