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 arctica gagarae Uschakov, 1950 accepted as Ampharete gagarae Uschakov, 1950 accepted as Anobothrus gracilis (Malmgren, 1866) (additional source)
Ampharete borealis (M. Sars, 1856) (basis of record)
Ampharete crassiseta Annenkova, 1929 (redescription)
Ampharete falcata Eliason, 1955 (redescription)
Ampharete finmarchica (M. Sars, 1865) (redescription)
Ampharete gagarae Uschakov, 1950 accepted as Anobothrus gracilis (Malmgren, 1866) (additional source)
Ampharete goeesi [auct.] accepted as Ampharete goesi Malmgren, 1866 (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 fragilis Wollebaek, 1912 accepted as Lysippe fragilis (Wollebaek, 1912) (source of synonymy)
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 figulus (Dalyell, 1853) represented as Neoamphitrite figulus (Dalyell, 1853) (redescription)
Amphitrite grayi Malmgren, 1866 represented as Neoamphitrite grayi (Malmgren, 1866) (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)
Arcteobia anticostiensis (Mcintosh, 1874) (redescription)
Arcteobia spinelytris Uschakov in Annenkova, 1937 (redescription)
Arctonoe vittata (Grube, 1855) (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 hartmanae (Strelzov, 1968) (redescription)
Aricidea nolani Webster & Benedict, 1887 (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)
Bathycanadia diaphana Levenstein, 1981 (redescription)
Bathymiranda microcephala Levenstein, 1981 (redescription)
Bathypolaria carinata Levenstein, 1981 (redescription)
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 nuda Annenkova-Chlopina, 1922 accepted as Bradabyssa nuda (Annenkova-Chlopina, 1922) (redescription)
Brada ochotensis Annenkova-Chlopina, 1922 (redescription)
Brada rugosa (Hansen, 1880) accepted as Bradabyssa rugosa (Hansen, 1880) (redescription)
Brada sachalina Annenkova-Chlopina, 1922 accepted as Bradabyssa sachalina (Annenkova-Chlopina, 1922) (redescription)
Brada strelzovi Jirkov & Filippova in Jirkov, 2001 accepted as Bradabyssa strelzovi (Jirkov & Filippova in Jirkov, 2001) (original description)
Brada tzetlini Jirkov & Filippova in Jirkov, 2001 (original description)
Brada villosa (Rathke, 1843) accepted as Bradabyssa villosa (Rathke, 1843) (redescription)
Branchiomaldane labradorensis Fournier & Barrie, 1987 (redescription)
Branchiomma arctica (Ditlevsen, 1937) accepted as Branchiomma arcticum (Ditlevsen, 1937) (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) quadrangularis (Stimpson, 1853) (redescription)
Bushiella (Jugaria) similis (Bush, 1905) (redescription)
Bylgides acutiseris [auctt., misspelling for acutisetis] accepted as Bylgides acutisetis Loshamn, 1981 (basis of record)
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)
Chauvinelia arctica Averincev, 1980 (additional source)
Chitinopoma serrula (Stimpson, 1853) (redescription)
Circeis spirillum (Linnaeus, 1758) (redescription)
Cirrophorus branchiatus Ehlers, 1908 (redescription)
Cirrophorus lyra (Southern, 1914) represented as Paradoneis lyra (Southern, 1914) (redescription)
Clymenura borealis (Arwidsson, 1906) (redescription)
Clymenura polaris (Théel, 1879) (redescription)
Cryptosclerocheilus Blake, 1972 accepted as Polyphysia Quatrefages, 1866 (source of synonymy)
Cryptosclerocheilus baffinensis Blake, 1972 accepted as Polyphysia baffinensis (Blake, 1972) (source of synonymy)
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)

 Editor's comment

 for Grubianella cirratus (Kucheruk, 1976)

Basionym is orphan taxon in synonymised genus. Awaiting revision. Possibly a synonym. Close to G. antarctica fide ... [details]

 Editor's comment

 for Owenia lobopygidiata Uschakov, 1950

data-entry spelling error in species epithet of 'lobopygidata' corrected to 'lobopygidiata' [GBR June 2016] [details]

 Editor's comment

 for Poylphysia [auct. misspelling for 'Polyphysia']

Could not find a literature usage of the misspelling. It appears to be an original data-entry lapsus by Fauchald. [details]

 Editor's comment

 for Pterolysippe vanelli (Fauvel, 1936)

In the original database data entry for aphia 334692 Fauchald recorded the authority of Pterolysippe vanelli as ... [details]

 Editor's comment

 for Spio armata (Thulin, 1957)

As known records are from the shallows in the Baltic Sea, a deepsea presence seems unlikely. Inclusion as a deepsea ... [details]

 Etymology

 for Laetmonice uschakovi Jirkov, 1989

The species is named after Pavel Vladimirovich Uschakov [details]

 Homonymy

 for Sosane wireni Caullery, 1944

The recombination of Sosanopsis wireni Hessle, 1917 into Sosane makes Sosane wireni Caullery, 1944 an unreplaced ... [details]

 New combination

 for Nereis gracilis (Hansen, 1879)

As Nereis gracilis comb nov.. Jirkov gets the original genus spelling, and the original date wrong. He has ... [details]

 Spelling

 for Paramphinome jeffreisii [auctt.]

lapsus introduced in Jirkov (2001:248). [details]

 Synonymy

 for Eclysippe Eliason, 1955

Day (1964:118) tentatively placed Eclysippe in Samythella Verrill, and later (1973:113) confirmed this synonymy. ... [details]

 Synonymy

 for Lysippe sexcirrata (Sars, 1856)

Combination suggested if Samytha is synonym of Lysippe, but the proposal of this by Jirkov currently appears not to ... [details]

 Synonymy

 for Paramphitrite tetrabranchia Holthe, 1976

May be a junior synonym of Paramphitrite birulai (Ssolowiew, 1899) according to Jirkov (2001: 519). Subsequently ... [details]

 Synonymy

 for Sosanopsis Hessle, 1917

Although multiple authors regarded Sosanopsis as valid, including up to Hilbig (2000), in 2001 Jirkov merged it ... [details]

 Taxonomy

 for Eunoe barbata Moore, 1910

Pettibone 1954 included Eunoe barbata in Eunoe oerstedi. However Jirkov 2001 describes both and treats E. barbata ... [details]

 Taxonomy

 for Proclea malmgreni (Ssolowiew, 1899)

Solowetia malmgreni Ssolowiew, 1899 was considered to be a junior synonym of Proclea graffii (Langerhans, 1884) by ... [details]

 Taxonomy

 for Solowetia malmgreni Ssolowiew, 1899

Solowetia malmgreni Ssolowiew, 1899 was considered to be a junior synonym of Proclea graffii (Langerhans, 1884) by ... [details]