1. Subfamily Crassostreinae Scarlato & Starobogatov, 1979
   1. Genus Angustostrea Vialov, 1936 †
   2. Genus Crassostrea Sacco, 1897
   3. Genus Cubitostrea Sacco, 1897 †
   4. Genus Ferganea Vialov, 1936 †
   5. Genus Magallana Salvi & Mariottini, 2016
   6. Genus Talonostrea X.-X. Li & Z.-Y. Qi, 1994
   7. Genus Dioeciostrea Orton, 1928 accepted as Crassostrea Sacco, 1897 (genus name unavailable)
   8. Genus Fergania [sic] † accepted as Ferganea Vialov, 1936 † (incorrect subsequent spelling)
   9. Genus Gryphaea Lamarck, 1801 sensu Ranson, 1955 accepted as Crassostrea Sacco, 1897 (unaccepted > misapplication)
2. Subfamily Ostreinae Rafinesque, 1815
   1. Genus Actinostreon Bayle, 1878 †
   2. Genus Alectryonella Sacco, 1897
   3. Genus Anomiostrea T. Habe & Kosuge, 1966
   4. Genus Booneostrea Harry, 1985
   5. Genus Dendostrea Swainson, 1835
   6. Genus Lopha Röding, 1798
   7. Genus Nanostrea Harry, 1985
   8. Genus Ostrea Linnaeus, 1758
   9. Genus Planostrea Harry, 1985
   10. Genus Pustulostrea Harry, 1985
   11. Genus Teskeyostrea Harry, 1985
   12. Genus Umbrostrea Hautmann, 2001 †
   13. Genus Alectryonia Fischer von Waldheim, 1807 accepted as Lopha Röding, 1798 (unaccepted > junior subjective synonym)
   14. Genus Anodontostrea Suter, 1917 accepted as Ostrea Linnaeus, 1758 (synonym)
   15. Genus Conradostrea Ward & Blackwelder, 1987 † accepted as Ostrea Linnaeus, 1758
   16. Genus Cryptostrea Harry, 1985 accepted as Ostrea Linnaeus, 1758
   17. Genus Dendostraea accepted as Dendostrea Swainson, 1835 (misspelling by Sowerby, 1839)
   18. Genus Dendrostraea accepted as Dendostrea Swainson, 1835 (misspelling by Swainson, 1840)
   19. Genus Dendrostrea accepted as Dendostrea Swainson, 1835 (misspelling by Woodward, 1851)
   20. Genus Eostrea Ihering, 1907 accepted as Ostrea Linnaeus, 1758 (synonym)
   21. Genus Monoeciostrea Orton, 1928 accepted as Ostrea Linnaeus, 1758 (genus name unavailable)
   22. Genus Myrakeena Harry, 1985 accepted as Ostrea Linnaeus, 1758
   23. Genus Ostracites Picot de Lapeirouse, 1781 † accepted as Ostrea Linnaeus, 1758
   24. Genus Ostraea [sic] accepted as Ostrea Linnaeus, 1758 (incorrect subsequent spelling by G.B. Sowerby II (1871) and others)
   25. Genus Ostreola Monterosato, 1884 accepted as Ostrea Linnaeus, 1758
   26. Genus Ostreum da Costa, 1776 accepted as Ostrea Linnaeus, 1758 (Unjustified emendation)
   27. Genus Palaeolopha Malchus, 1990 † accepted as Actinostreon Bayle, 1878 † (unaccepted > junior subjective synonym)
   28. Genus Pretostrea Iredale, 1939 accepted as Dendostrea Swainson, 1835 (synonym)
   29. Genus Tiostrea Chanley & Dinamani, 1980 accepted as Ostrea Linnaeus, 1758 (synonym)
   30. Genus Undulostrea Harry, 1985 accepted as Ostrea Linnaeus, 1758
3. Subfamily Saccostreinae Salvi & Mariottini, 2016
   1. Genus Saccostrea Dollfus & Dautzenberg, 1920
   2. Genus Parastriostrea Harry, 1985 accepted as Saccostrea Dollfus & Dautzenberg, 1920 (synonym)
   3. Genus Saxostrea Iredale, 1936 accepted as Saccostrea Dollfus & Dautzenberg, 1920 (synonym)
4. Subfamily Striostreinae Harry, 1985
   1. Genus Striostrea Vialov, 1936
5. Subfamily Lophinae Vialov, 1936 accepted as Ostreinae Rafinesque, 1815
6. Subfamily Ostreidae incertae sedis (temporary name)
   1. Genus Kulunostrea J.-M. Wei, 1984 †
   2. Genus Nicaisolopha Vyalov, 1936
   3. Genus Pseudoperna Logan, 1899 †
   4. Genus Sokolowia Böhm, 1933 †

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