Polychaeta Grube, 1850
Abyssocapitella Buzhinskaja & Smirnov, 2000
Amastigos Piltz, 1976
Ancistia Schmarda, 1877
Ancistra Pernier, 1897
Ancistria Quatrefages, 1866
Ancystria Czerniavsky, 1881
Anotomastus Hartman, 1947
Arenia Quatrefages, 1866
Areniella Verrill, 1874
Baldia Garwood & Bamber, 1988
Barantolla Southern, 1921
Branchiocapitella Fauvel, 1932
Branchoscolex Schmarda, 1861
Bucherta Rullier, 1965
Capitata Hartman, 1947
Capitella Blainville, 1828
Capitellethus Chamberlin, 1919
Capitellides Mesnil, 1897
Capitita
Capitobranchus Day, 1962
Capitomastus Eisig, 1887
Dasybranchethus Monro, 1931
Dasybranchetus Monro, 1931
Dasybranchus Grube, 1850
Decamastus Hartman, 1963
Dodecamastus
Dodecaseta McCammon, 1970
Eisigella
Eunotomastus McIntosh, 1885
Heteromastides Augener, 1914
Heteromastus Eisig, 1887
Isomastus Gravier, 1911
Leiocapitella Hartman, 1947
Leiocapitellides Hartmann-Schröder, 1960
Leiochrides Augener, 1914
Leiochrus Ehlers, 1908
Lombricus
Lumbricomastus Thomassin, 1970
Lumbriconais Örsted, 1842
Mastobranchus Eisig, 1887
Matla Stephenson, 1908
Mediomastus Hartman, 1944
Neoheteromastus Hartman, 1960
Neomediomastus Hartman, 1969
Neonotomastus Fauchald, 1972
Neopseudocapitella Rullier & Amoureux, 1979
Nonatus Amaral, 1980
Notodasus Fauchald, 1972
Notomastus Sars, 1850
Octocapitella Brown, 1987
Paracapitella Carrasco & Gallardo, 1987
Paraleiocapitella Thomassin, 1970
Paraleiochrides Zhang & Sun, 1997
Parheteromastides Hartmann-Schröder, 1962
Parheteromastus Monro, 1937
Peresiella Harmelin, 1968
Polymastigos Green, 2002
Promastobranchus Gallardo, 1968
Protomastobranchus
Pseudocapitella Fauvel, 1913
Pseudoleiocapitella Harmelin, 1964
Pseudomastus Capaccioni-Azzati & Martin, 1992
Pseudonotomastus Warren & Parker, 1994
Pulliella Fauvel, 1929
Rashgua Wesenberg-Lund, 1949
Saenuris Hoffmeister, 1842
Sandanis Kinberg, 1866
Scyphoproctus Gravier, 1904
Undecimastus Amoureux, 1983
Valla Johnston, 1865