ARMS Taxon list
Abyssoninoe Orensanz, 1990
Abyssoninoe hibernica (McIntosh, 1903)
Abyssoninoe scopa (Fauchald, 1974)
Aciculata accepted as Errantia
Acrocirridae Banse, 1969
Actaedrilus Jimi, Fujimoto & Imura, 2020
Actaedrilus polyonyx (Eliason, 1962)
Aglaophamus Kinberg, 1866
Aglaophamus malmgreni (Théel, 1879)
Alitta Kinberg, 1865
Alitta virens (M. Sars, 1835)
Amaeana Hartman, 1959
Amaeana trilobata (Sars, 1863)
Amage Malmgren, 1866
Amage auricula Malmgren, 1866
Amage gallasii Marion, 1875
Amage gallasii Marion, 1876 accepted as Amage gallasii Marion, 1875
Amaginae Holthe, 1986
Amagopsis Pergament & Khlebovich, 1964 accepted as Grubianella McIntosh, 1885
Amagopsis klugei Pergament & Khlebovich, 1964 accepted as Grubianella klugei (Pergament & Khlebovich, 1964)
Amblyosyllis Grube, 1857
Amblyosyllis finmarchica (Malmgren, 1867)
Amblyosyllis formosa (Claparède, 1863) accepted as Amblyosyllis spectabilis (Johnston in Baird, 1861)
Amblyosyllis spectabilis (Johnston in Baird, 1861)
Ampharete Malmgren, 1866
Ampharete acutifrons (Grube, 1860)
Ampharete baltica Eliason, 1955
Ampharete borealis (M. Sars, 1856)
Ampharete eupalea Chamberlin, 1920
Ampharete falcata Eliason, 1955
Ampharete finmarchica (M. Sars, 1865)
Ampharete goesi Malmgren, 1866
Ampharete lindstroemi Hessle, 1917
Ampharete sibirica (Wirén, 1883)
Ampharete vega (Wirén, 1883)
Ampharetidae Malmgren, 1866
Ampharetinae Malmgren, 1866
Ampharetini Holthe, 1986
Amphicorina Claparède, 1864
Amphicteis Grube, 1850
Amphicteis gunneri (M. Sars, 1835)
Amphicteis ninonae Jirkov, 1985
Amphicteis sundevalli Malmgren, 1866
Amphictene Savigny, 1822
Amphictene auricoma (O.F. Müller, 1776)
Amphinomida
Amphinomidae Lamarck, 1818
Amphinominae Lamarck, 1818
Amphitrite Müller, 1771
Amphitrite birulai Ssolowiew, 1899 accepted as Paramphitrite birulai (Ssolowiew, 1899)
Amphitrite cirrata Müller, 1776
Amphitritinae Malmgren, 1866 accepted as Terebellinae Johnston, 1846
Anaitides Czerniavsky, 1882 accepted as Phyllodoce Lamarck, 1818
Anaitides citrina (Malmgren, 1865) accepted as Phyllodoce citrina Malmgren, 1865
Anaspio Chamberlin, 1920 accepted as Prionospio Malmgren, 1867
Anaspio boreus Chamberlin, 1920 (uncertain > nomen dubium )
Annenkova Salazar-Vallejo, 2012
Annenkova mastigophora (Annenkova, 1952)
Anobothrus Levinsen, 1884
Anobothrus gracilis (Malmgren, 1866)
Anobothrus laubieri (Desbruyères, 1978)
Anoplosyllinae Aguado & San Martín, 2009
Antinoella Augener, 1928 accepted as Bylgides Chamberlin, 1919
Antinoella badia (Théel, 1879) accepted as Bylgides promamme (Malmgren, 1867)
Antinoella sarsi (Kinberg in Malmgren, 1866) accepted as Bylgides sarsi (Kinberg in Malmgren, 1866)
Aonides Claparède, 1864
Aonides oxycephala (Sars, 1862)
Aonides paucibranchiata Southern, 1914
Aphelochaeta Blake, 1991
Aphelochaeta marioni (Saint-Joseph, 1894)
Aphrodita Linnaeus, 1758
Aphrodita aculeata Linnaeus, 1758
Aphroditidae Malmgren, 1867
Aphroditiformia
Aphroditoidea (uncertain > nomen dubium )
Apistobranchidae Mesnil & Caullery, 1898
Apistobranchus Levinsen, 1884
Apistobranchus tullbergi (Théel, 1879)
Apomatus Philippi, 1844
Apomatus globifer Théel, 1879
Apomatus similis Marion & Bobretzky, 1875
Arcteobia Annenkova, 1937
Arcteobia anticostiensis (Mcintosh, 1874)
Arctonoe Chamberlin, 1920
Arctonoe vittata (Grube, 1855)
Arctonoinae Hanley, 1989
Arenicola Lamarck, 1801
Arenicola cristata Stimpson, 1856
Arenicola marina (Linnaeus, 1758)
Arenicola marina glacialis Murdich, 1885
Arenicolidae Johnston, 1835
Arenotrocha Westheide & von Nordheim, 1985
Arenotrocha minuta (Lévi, 1954)
Aricidea Webster, 1879
Aricidea (Acmira) Hartley, 1981
Aricidea (Acmira) catherinae Laubier, 1967
Aricidea (Acmira) cerrutii Laubier, 1966
Aricidea (Strelzovia) Aguirrezabalaga, 2012
Aricidea (Strelzovia) quadrilobata Webster & Benedict, 1887
Aricidea abranchiata Hartman, 1965