Acanthicolepis asperrima (M. Sars, 1861) (redescription)
Aglaophamus malmgreni (Théel, 1879) (redescription)
Aglaophamus rubellus (Michaelsen, 1896) accepted as Aglaophamus agilis (Langerhans, 1880) (redescription)
Alentia gelatinosa (M. Sars, 1835) (redescription)
Alitta virens (M. Sars, 1835) (redescription)
Alkmaria romijni Horst, 1919 (source of synonymy)
Amaeana trilobata (Sars, 1863) (redescription)
Amage auricula Malmgren, 1866 (redescription)
Amagopsis Pergament & Khlebovich, 1964 accepted as Grubianella McIntosh, 1885 (source of synonymy)
Amagopsis klugei Pergament & Khlebovich, 1964 accepted as Grubianella klugei (Pergament & Khlebovich, 1964) (source of synonymy)
Ampharete acutifrons (Grube, 1860) (redescription)
Ampharete borealis (M. Sars, 1856) (basis of record)
Ampharete falcata Eliason, 1955 (redescription)
Ampharete finmarchica (M. Sars, 1865) (redescription)
Ampharete lindstroemi Hessle, 1917 (redescription)
Ampharete octocirrata (Sars, 1835) (basis of record)
Ampharete petersenae Jirkov, 1997 (redescription)
Ampharete sibirica (Wirén, 1883) (basis of record)
Ampharete vega (Wirén, 1883) (redescription)
Amphicteis gunneri (M. Sars, 1835) (redescription)
Amphicteis ninonae Jirkov, 1985 (redescription)
Amphicteis sundevalli Malmgren, 1866 (redescription)
Amphitrite affinis Malmgren, 1866 represented as Neoamphitrite affinis (Malmgren, 1866) (redescription)
Amphitrite cirrata Müller, 1776 (redescription)
Amphitrite groenlandica Malmgren, 1866 represented as Neoamphitrite groenlandica (Malmgren, 1866) (redescription)
Amphitritides gracilis (Grube, 1860) (redescription)
Amythasides macroglossus Eliason, 1955 (redescription)
Anobothrus gracilis (Malmgren, 1866) (redescription)
Anobothrus laubieri (Desbruyères, 1978) (basis of record)
Antinoella finmarchica (Malmgren, 1867) accepted as Antinoe finmarchica Malmgren, 1867 (status source)
Aonides oxycephala (Sars, 1862) (redescription)
Aonides paucibranchiata Southern, 1914 (redescription)
Aphrodita aculeata Linnaeus, 1758 (identification resource)
Apistobranchus tullbergi (Théel, 1879) (redescription)
Arenicola marina (Linnaeus, 1758) (redescription)
Aricidea abranchiata Hartman, 1965 (redescription)
Aricidea albatrossae Pettibone, 1957 represented as Aricidea (Aricidea) albatrossae Pettibone, 1957 (redescription)
Aricidea catherinae Laubier, 1967 represented as Aricidea (Acmira) catherinae Laubier, 1967 (redescription)
Aricidea quadrilobata Webster & Benedict, 1887 represented as Aricidea (Strelzovia) quadrilobata Webster & Benedict, 1887 (redescription)
Artacama proboscidea Malmgren, 1866 (redescription)
Asychis biceps (M. Sars, 1861) accepted as Chirimia biceps biceps (Sars, 1861) (redescription)
Austrolaenilla mollis (Sars, 1872) (redescription)
Axiothella catenata (Malmgren, 1865) (redescription)
Baffinia hesslei (Annenkova-Chlopina, 1924) (additional source)
Bispira crassicornis (Sars, 1851) (redescription)
Bispira fabricii (Krøyer, 1856) (redescription)
Bispira volutacornis (Montagu, 1804) (redescription)
Brada granulosa Hansen, 1880 (redescription)
Brada incrustata Støp-Bowitz, 1948 (redescription)
Brada inhabilis (Rathke, 1843) (redescription)
Brada rugosa (Hansen, 1880) accepted as Bradabyssa rugosa (Hansen, 1880) (redescription)
Brada villosa (Rathke, 1843) accepted as Bradabyssa villosa (Rathke, 1843) (redescription)
Bushiella (Bushiella) evoluta (Bush, 1905) accepted as Bushiella (Bushiella) verruca (Fabricius in Mörch, 1863) (redescription)
Bushiella (Bushiella) verruca (Fabricius in Mörch, 1863) (redescription)
Bushiella (Jugaria) granulata (Linnaeus, 1767) accepted as Janua heterostropha (Montagu, 1803) (redescription)
Bushiella (Jugaria) kofiadii Rzhavsky, 1988 (redescription)
Bushiella (Jugaria) similis (Bush, 1905) (redescription)
Bylgides annenkovae Pettibone, 1993 (redescription)
Bylgides elegans (Théel, 1879) (redescription)
Bylgides groenlandicus (Malmgren, 1867) (redescription)
Bylgides promamme (Malmgren, 1867) (redescription)
Ceratocephale loveni Malmgren, 1867 (redescription)
Chaetoparia nilssoni Malmgren, 1867 (redescription)
Chitinopoma serrula (Stimpson, 1853) (redescription)
Circeis spirillum (Linnaeus, 1758) (redescription)
Cirrophorus branchiatus Ehlers, 1908 (redescription)
Clymenura borealis (Arwidsson, 1906) (redescription)
Clymenura polaris (Théel, 1879) (redescription)
Diplocirrus glaucus (Malmgren, 1867) (redescription)
Diplocirrus hirsutus (Hansen, 1878) accepted as Saphobranchia hirsuta (Hansen, 1878) (redescription)
Diplocirrus longisetosus (Marenzeller, 1890) accepted as Saphobranchia longisetosa (Marenzeller, 1890) (redescription)
Ditrupa arietina (O. F. Müller, 1776) (redescription)
Drilonereis filum (Claparède, 1868) (redescription)
Dysponetus pygmaeus Levinsen, 1879 (redescription)
Eclysippe Eliason, 1955 (source of synonymy)
Enipo torelli (Malmgren, 1865) (redescription)
Eteone barbata (Malmgren, 1865) accepted as Mysta barbata Malmgren, 1865 (redescription)
Eteone flava (Fabricius, 1780) (redescription)
Eteone foliosa Quatrefages, 1866 accepted as Hypereteone foliosa (Quatrefages, 1865) (redescription)
Eteone suecica Bergström, 1914 (redescription)
Euchone analis (Krøyer, 1856) (redescription)
Euchone papillosa (Sars, 1851) (redescription)
Euclymene droebachiensis (Sars, 1872) (redescription)
Eucranta villosa Malmgren, 1865 (redescription)
Eulalia bilineata (Johnston, 1840) (redescription)
Eulalia expusilla Pleijel, 1987 (redescription)
Eulalia hanssoni Pleijel, 1987 (redescription)
Eulalia microoculata Pleijel, 1987 (redescription)
Eulalia mustela Pleijel, 1987 (redescription)
Eulalia tjalfiensis Ditlevsen, 1917 (redescription)
Eulalia viridis (Linnaeus, 1767) (redescription)
Eumida arctica (Annenkova, 1946) (additional source)
Eumida bahusiensis Bergstrom, 1914 (redescription)
Eumida ockelmanni Eibye-Jacobsen, 1987 (redescription)
Eumida sanguinea (Örsted, 1843) (redescription)
Eunereis longissima (Johnston, 1840) (redescription)
Eunice dubitata Fauchald, 1974 (redescription)
Eunice norvegica (Linnaeus, 1767) (redescription)
Eunice pennata (Müller, 1776) (redescription)
Eunoe nodosa (M. Sars, 1861) (redescription)