1. Genus Abyssocapitella Buzhinskaja & Smirnov, 2000
2. Genus Amastigos Piltz, 1977
3. Genus Anotomastus Hartman, 1947
4. Genus Baldia Garwood & Bamber, 1988
5. Genus Barantolla Southern, 1921
6. Genus Capitella Blainville, 1828
7. Genus Capitellethus Chamberlin, 1919
8. Genus Capitobranchus Day, 1962
9. Genus Dasybranchethus Monro, 1931
10. Genus Dasybranchus Grube, 1850
11. Genus Decamastus Hartman, 1963
12. Genus Dodecamastus Blake, 2000
13. Genus Eunotomastus McIntosh, 1885
14. Genus Heteromastus Eisig, 1887
15. Genus Leiocapitella Hartman, 1947
16. Genus Leiocapitellides Hartmann-Schröder, 1960
17. Genus Leiochrides Augener, 1914
18. Genus Leiochrus Ehlers, 1908
19. Genus Lombricus Vérany, 1846
20. Genus Lumbricomastus Thomassin, 1970
21. Genus Mastobranchus Eisig, 1887
22. Genus Mediomastus Hartman, 1944
23. Genus Neoheteromastus Hartman, 1960
24. Genus Neomediomastus Hartman, 1969
25. Genus Neonotomastus Fauchald, 1972
26. Genus Neopseudocapitella Rullier & Amoureux, 1979
27. Genus Nonatus Amaral, 1980
28. Genus Notodasus Fauchald, 1972
29. Genus Notomastus M. Sars, 1851
30. Genus Octocapitella Brown, 1987
31. Genus Paracapitella Kirkegaard, 1983
32. Genus Parheteromastides Hartmann-Schröder, 1962
33. Genus Parheteromastus Monro, 1937
34. Genus Peresiella Harmelin, 1968
35. Genus Polymastigos Green, 2002
36. Genus Promastobranchus Gallardo, 1968
37. Genus Pseudocapitella Fauvel, 1913
38. Genus Pseudoleiocapitella Harmelin, 1964
39. Genus Pseudonotomastus Warren & Parker, 1994
40. Genus Rashgua Wesenberg-Lund, 1949
41. Genus Scyphoproctus Gravier, 1904
42. Genus Undecimastus Amoureux, 1983
43. Genus Ancistria Quatrefages, 1866 accepted as Heteromastus Eisig, 1887 (junior homonym, replaced by junior synonym Heteromastus)
44. Genus Arenia Quatrefages, 1866 accepted as Notomastus M. Sars, 1851
45. Genus Areniella Verrill, 1874 accepted as Heteromastus Eisig, 1887 (subjective synonym)
46. Genus Branchiocapitella Fauvel, 1932 accepted as Capitella Blainville, 1828 (subjective synonym)
47. Genus Branchoscolex Schmarda, 1861 accepted as Dasybranchus Grube, 1850 (subjective synonym)
48. Genus Bucherta Rullier, 1965 accepted as Dasybranchus Grube, 1850 (subjective synonym)
49. Genus Capitellides Mesnil, 1897 accepted as Capitella Blainville, 1828 (subjective synonym)
50. Genus Capitellides Ehlers, 1907 accepted as Capitellethus Chamberlin, 1919 (replaced junior homonym to Capitellides Mesnil, 1897)
51. Genus Capitita Hartman, 1947 accepted as Mediomastus Hartman, 1944 (subjective synonym)
52. Genus Capitomastus Eisig, 1887 accepted as Capitella Blainville, 1828 (subjective synonym)
53. Genus Dasymallus Grube, 1846 accepted as Dasybranchus Grube, 1850 (junior homonym, replaced by Dasybranchus)
54. Genus Dodecaseta McCammon & Stull, 1978 accepted as Notodasus Fauchald, 1972 (subjective synonym)
55. Genus Heteromastides Augener, 1914 accepted as Scyphoproctus Gravier, 1904 (subjective synonym)
56. Genus Isomastus Gravier, 1911 accepted as Capitella Blainville, 1828 (subjective synonym)
57. Genus Lumbriconais Örsted, 1842 accepted as Capitella Blainville, 1828 (subjective synonym)
58. Genus Matla Stephenson, 1908 accepted as Capitella Blainville, 1828 (subjective synonym)
59. Genus Notobranchus Capaccioni--Azzati & El-Haddad in Parapar et al, 2015 accepted as Leiochrides Augener, 1914 (new name for homonym Pseudomastus, a subjective synonym of Leiochrides)
60. Genus Paraleiocapitella Thomassin, 1970 accepted as Notomastus M. Sars, 1851 (subjective synonym)
61. Genus Protomastobranchus [auct.] accepted as Promastobranchus Gallardo, 1968 (misspelling)
62. Genus Pseudomastus Capaccioni-Azzati & Martin, 1992 accepted as Leiochrides Augener, 1914 (subjective synonym, but firstly unavailable as a homonym, replaced by Notobranchus)
63. Genus Pulliella Fauvel, 1929 accepted as Scyphoproctus Gravier, 1904 (subjective synonym)
64. Genus Saenuris Grube, 1860
65. Genus Sandanis Kinberg, 1867 accepted as Notomastus M. Sars, 1851 (subjective synonym)
66. Genus Valla Johnston, 1865 accepted as Capitella Blainville, 1828 (subjective synonym)
67. Genus Paracapitella Carrasco & Gallardo, 1987 (uncertain > nomen dubium, unreplaced junior homonym to Paracapitella Kirkegaard, 1983)

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