Abarenicola Wells, 1959 (habitat flag source)
Aberranta Hartman, 1965 (habitat flag source)
Abyssocapitella Buzhinskaja & Smirnov, 2000 (habitat flag source)
Abyssocapitella Buzhinskaja & Smirnov, 2000 (extant flag source)
Abyssoninoe Orensanz, 1990 (habitat flag source)
Acanthicolepis McIntosh, 1900 (habitat flag source)
Acanthopale San Martín, 1986 (habitat flag source)
Acholoe Claparède, 1870 (habitat flag source)
Aciculomarphysa Hartmann-Schröder in Hartmann-Schröder & Zibrowius, 1998 (extant flag source)
Aciculomarphysa Hartmann-Schröder in Hartmann-Schröder & Zibrowius, 1998 (habitat flag source)
Aclymeme Buzhinskaja, 1995 (habitat flag source)
Aclymeme Buzhinskaja, 1995 (extant flag source)
Aclymeme Buzhinskaja, 1995 (name verified source)
Aclymeme Buzhinskaja, 1995 (current name source)
Aclymeme Buzhinskaja, 1995 (basis of record)
Acmira Hartley, 1981 accepted as Aricidea Webster, 1879 (habitat flag source)
Acoetes Audouin & Milne Edwards, 1832 (habitat flag source)
Acrocirrus Grube, 1873 (habitat flag source)
Adercodon Mackie, 1994 (habitat flag source)
Admetella McIntosh, 1885 (habitat flag source)
Adyte Saint-Joseph, 1899 (habitat flag source)
Adyte Saint-Joseph, 1899 (extant flag source)
Aedicira Hartman, 1957 accepted as Aricidea Webster, 1879 (habitat flag source)
Aeolosoma Ehrenberg, 1831 (habitat flag source)
Afronerilla Faubel, 1978 (habitat flag source)
Aglaophamus Kinberg, 1865 (habitat flag source)
Aglaura Savigny in Lamarck, 1818 (extant flag source)
Aglaura Savigny in Lamarck, 1818 (habitat flag source)
Aglaurides Ehlers, 1866 accepted as accepted as Oenone Lamarck, 1818 (habitat flag source)
Akessoniella Tzetlin & Larionov, 1988 (name verified source)
Akessoniella Tzetlin & Larionov, 1988 (habitat flag source)
Akessoniella Tzetlin & Larionov, 1988 (basis of record)
Akessoniella Tzetlin & Larionov, 1988 (extant flag source)
Akessoniella Tzetlin & Larionov, 1988 (current name source)
Alaysia Southward, 1991 (habitat flag source)
Alcandra Kinberg, 1866 accepted as Scoloplos Blainville, 1828 (habitat flag source)
Alcandra Kinberg, 1866 accepted as Scoloplos Blainville, 1828 (extant flag source)
Alciopa Audouin & Milne-Edwards, 1833 (habitat flag source)
Alciope Viguier, 1886 (habitat flag source)
Alciope Viguier, 1886 (extant flag source)
Alciopina Claparède & Panceri, 1867 (habitat flag source)
Alcyonosyllis Glasby & Watson, 2001 (habitat flag source)
Alcyonosyllis Glasby & Watson, 2001 (extant flag source)
Alentia Malmgren, 1866 (habitat flag source)
Alentiana Hartman, 1942 (habitat flag source)
Alitta Kinberg, 1865 (extant flag source)
Alitta Kinberg, 1865 (habitat flag source)
Alkmaria Horst, 1919 (habitat flag source)
Allia Strel'tzov, 1973 accepted as Aricidea Webster, 1879 (habitat flag source)
Allmaniella McIntosh, 1885 (habitat flag source)
Aloysina Claparède, 1864 (habitat flag source)
Aloysina Claparède, 1864 (extant flag source)
Alvinella Desbruyères & Laubier, 1980 (habitat flag source)
Amaea Malmgren, 1866 accepted as Amaeana Hartman, 1959 (habitat flag source)
Amaea Malmgren, 1866 accepted as Amaeana Hartman, 1959 (extant flag source)
Amaeana Hartman, 1959 (habitat flag source)
Amage Malmgren, 1866 (habitat flag source)
Amagopsis Pergament & Khlebovich, 1964 accepted as Grubianella McIntosh, 1885 (habitat flag source)
Amastigos Piltz, 1977 (habitat flag source)
Amathys Desbruyères & Laubier, 1996 accepted as Amphisamytha Hessle, 1917 (habitat flag source)
Amathys Desbruyères & Laubier, 1996 accepted as Amphisamytha Hessle, 1917 (extant flag source)
Amblosyllis Grube, 1857 (habitat flag source)
Amblosyllis Grube, 1857 (extant flag source)
Amblyosyllis Grube, 1857 (habitat flag source)
Ambo Chamberlin, 1918 accepted as Timarete Kinberg, 1866 (habitat flag source)
Amelinna Hartman, 1969 accepted as Melinnopsis McIntosh, 1885 (habitat flag source)
Americonuphis Fauchald, 1973 (habitat flag source)
Ammochares Grube, 1846 accepted as Owenia delle Chiaje, 1844 (extant flag source)
Ammochares Grube, 1846 accepted as Owenia delle Chiaje, 1844 (habitat flag source)
Ammotrypane Rathke, 1843 accepted as Ophelina Örsted, 1843 (habitat flag source)
Ammotrypanella McIntosh, 1878 (habitat flag source)
Amocrodorum Kudenov, 1987 (basis of record)
Amocrodorum Kudenov, 1987 (name verified source)
Amocrodorum Kudenov, 1987 (current name source)
Ampharana Hartman, 1967 (habitat flag source)
Ampharete Malmgren, 1866 (habitat flag source)
Ampharetides Ehlers, 1913 accepted as Terebellides Sars, 1835 (extant flag source)
Ampharetides Ehlers, 1913 accepted as Terebellides Sars, 1835 (habitat flag source)
Amphelothrix Chamberlin, 1919 accepted as Marphysa Quatrefages, 1866 (habitat flag source)
Amphelothrix Chamberlin, 1919 accepted as Marphysa Quatrefages, 1866 (extant flag source)
Amphicorina Claparède, 1864 (habitat flag source)
Amphicorina Claparède, 1864 (extant flag source)
Amphicteis Grube, 1850 (habitat flag source)
Amphictene Savigny, 1822 (habitat flag source)
Amphidromus Hessle, 1925 accepted as Amphiduros Hartman, 1959 (habitat flag source)
Amphidromus Hessle, 1925 accepted as Amphiduros Hartman, 1959 (extant flag source)
Amphiduropsis Pleijel, 2001 (habitat flag source)
Amphiduropsis Pleijel, 2001 (extant flag source)
Amphiduros Hartman, 1959 (habitat flag source)
Amphiglena Claparède, 1864 (habitat flag source)
Amphinome Bruguière, 1789 (habitat flag source)
Amphiro Kinberg, 1865 accepted as Marphysa Quatrefages, 1866 (habitat flag source)
Amphiro Kinberg, 1865 accepted as Marphysa Quatrefages, 1866 (extant flag source)
Amphisamytha Hessle, 1917 (habitat flag source)
Amphitrite Müller, 1771 (habitat flag source)
Amphitritides Augener, 1922 (habitat flag source)
Amphitritoites Costa, 1862 (habitat flag source)
Amphitritoites Costa, 1862 (extant flag source)
Amplaria Knight-Jones, 1973 accepted as Amplicaria Knight-Jones, 1984 (habitat flag source)
Amplicaria Knight-Jones, 1984 (habitat flag source)