Abarenicola Wells, 1959 (habitat flag source)
Aberranta Hartman, 1965 (habitat flag source)
Abyssocapitella Buzhinskaja & Smirnov, 2000 (extant flag source)
Abyssocapitella Buzhinskaja & Smirnov, 2000 (habitat 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 (habitat flag source)
Aciculomarphysa Hartmann-Schröder in Hartmann-Schröder & Zibrowius, 1998 (extant flag source)
Aclymeme Buzhinskaja, 1995 accepted as Aclymene Buzhinskaja, 1995 (name verified source)
Aclymeme Buzhinskaja, 1995 accepted as Aclymene Buzhinskaja, 1995 (extant flag source)
Aclymeme Buzhinskaja, 1995 accepted as Aclymene Buzhinskaja, 1995 (current name source)
Aclymeme Buzhinskaja, 1995 accepted as Aclymene Buzhinskaja, 1995 (basis of record)
Aclymeme Buzhinskaja, 1995 accepted as Aclymene Buzhinskaja, 1995 (habitat flag source)
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 (extant flag source)
Adyte Saint-Joseph, 1899 (habitat 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 Tsetlin & Larionov, 1988 accepted as Nerillidium Remane, 1925 (basis of record)
Akessoniella Tsetlin & Larionov, 1988 accepted as Nerillidium Remane, 1925 (habitat flag source)
Akessoniella Tsetlin & Larionov, 1988 accepted as Nerillidium Remane, 1925 (name verified source)
Akessoniella Tsetlin & Larionov, 1988 accepted as Nerillidium Remane, 1925 (current name source)
Akessoniella Tsetlin & Larionov, 1988 accepted as Nerillidium Remane, 1925 (extant flag source)
Alaysia Southward, 1991 (habitat flag source)
Alcandra Kinberg, 1866 accepted as Scoloplos Blainville, 1828 (extant flag source)
Alcandra Kinberg, 1866 accepted as Scoloplos Blainville, 1828 (habitat 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 (habitat flag source)
Alitta Kinberg, 1865 (extant 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 (extant flag source)
Aloysina Claparède, 1864 (habitat flag source)
Alvinella Desbruyères & Laubier, 1980 (habitat flag source)
Amaea Malmgren, 1866 accepted as Amaeana Hartman, 1959 (extant flag source)
Amaea Malmgren, 1866 accepted as Amaeana Hartman, 1959 (habitat 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 (extant flag source)
Amathys Desbruyères & Laubier, 1996 accepted as Amphisamytha Hessle, 1917 (habitat flag source)
Amblosyllis Grube, 1857 accepted as Amblyosyllis Grube, 1857 (extant flag source)
Amblosyllis Grube, 1857 accepted as Amblyosyllis Grube, 1857 (habitat 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 accepted as Amacrodorum Kudenov, 1987 accepted as Euritmia Sarda-Borroy, 1987 (basis of record)
Amocrodorum Kudenov, 1987 accepted as Amacrodorum Kudenov, 1987 accepted as Euritmia Sarda-Borroy, 1987 (name verified source)
Amocrodorum Kudenov, 1987 accepted as Amacrodorum Kudenov, 1987 accepted as Euritmia Sarda-Borroy, 1987 (current name source)
Ampharana Hartman, 1967 (habitat flag source)
Ampharete Malmgren, 1866 (habitat flag source)
Ampharetides Ehlers, 1913 accepted as Terebellides Sars, 1835 (habitat flag source)
Ampharetides Ehlers, 1913 accepted as Terebellides Sars, 1835 (extant 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 (extant flag source)
Amphiduropsis Pleijel, 2001 (habitat 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 accepted as Amphitritoides Costa, 1862 accepted as Eupolymnia Verrill, 1900 (habitat flag source)
Amphitritoites Costa, 1862 accepted as Amphitritoides Costa, 1862 accepted as Eupolymnia Verrill, 1900 (extant flag source)
Amplaria Knight-Jones, 1973 accepted as Amplicaria Knight-Jones, 1984 (habitat flag source)
Amplicaria Knight-Jones, 1984 (extant flag source)