1. Subfamily Colossomatinae Kolmann et al., 2021
   1. Genus Colossoma Eigenmann & Kennedy, 1903
   2. Genus Mylossoma Eigenmann & Kennedy, 1903
   3. Genus Piaractus Eigenmann, 1903
   4. Genus Colosoma Eigenmann & Kennedy, 1903 accepted as Colossoma Eigenmann & Kennedy, 1903 (unaccepted > misspelling - incorrect subsequent spelling)
   5. Genus Colosomma Eigenmann & Kennedy, 1903 accepted as Colossoma Eigenmann & Kennedy, 1903 (unaccepted > misspelling - incorrect subsequent spelling)
   6. Genus Melloina Amaral Campos, 1946 accepted as Colossoma Eigenmann & Kennedy, 1903 (unaccepted > junior subjective synonym)
   7. Genus Mylosoma Eigenmann & Kennedy, 1903 accepted as Mylossoma Eigenmann & Kennedy, 1903 (unaccepted > misspelling - incorrect subsequent spelling)
   8. Genus Mylosomma Eigenmann & Kennedy, 1903 accepted as Mylossoma Eigenmann & Kennedy, 1903
   9. Genus Reganina Fowler, 1907 accepted as Piaractus Eigenmann, 1903 (unaccepted > junior subjective synonym)
   10. Genus Waiteina Fowler, 1907 accepted as Colossoma Eigenmann & Kennedy, 1903 (unaccepted > junior subjective synonym)
   11. Genus Wateina Fowler, 1907 accepted as Waiteina Fowler, 1907 accepted as Colossoma Eigenmann & Kennedy, 1903 (unaccepted > misspelling - incorrect subsequent spelling)
2. Subfamily Myleinae Eigenmann, 1903
   1. Genus Acnodon Eigenmann, 1903
   2. Genus Mylesinus Valenciennes, 1850
   3. Genus Myleus Müller & Troschel, 1844
   4. Genus Myloplus Gill, 1896
   5. Genus Ossubtus Jégu, 1992
   6. Genus Paramyloplus Norman, 1929
   7. Genus Prosomyleus Géry, 1972
   8. Genus Tometes Valenciennes, 1850
   9. Genus Utiaritichthys Miranda Ribeiro, 1937
   10. Genus Tomete Valenciennes, 1850 accepted as Tometes Valenciennes, 1850 (unaccepted > misspelling - incorrect subsequent spelling)
   11. Genus Utiarichthys Miranda Ribeiro, 1937 accepted as Utiaritichthys Miranda Ribeiro, 1937 (unaccepted > misspelling - incorrect original spelling)
3. Subfamily Serrasalminae Bleeker, 1859
   1. Genus Catoprion Müller & Troschel, 1844
   2. Genus Metynnis Cope, 1878
   3. Genus Pygocentrus Müller & Troschel, 1844
   4. Genus Pygopristis Müller & Troschel, 1844
   5. Genus Serrasalmus Lacepède, 1803
   6. Genus Pristobrycon Eigenmann, 1915 accepted as Serrasalmus Lacepède, 1803 (unaccepted > junior subjective synonym)
   7. Genus Rooseveltiella Eigenmann, 1915 accepted as Pygocentrus Müller & Troschel, 1844 (unaccepted > junior homonym)
   8. Genus Serrasalme Lacepède, 1803 accepted as Serrasalmus Lacepède, 1803 (unaccepted > misspelling - incorrect subsequent spelling)
   9. Genus Serrasalmo Lacepède, 1803 accepted as Serrasalmus Lacepède, 1803 (unaccepted > misspelling - incorrect subsequent spelling)

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