Amage Malmgren, 1866 (original description)
Amage auricula Malmgren, 1866 (original description)
Ampharete Malmgren, 1866 (original description)
Ampharete arctica Malmgren, 1866 accepted as Ampharete finmarchica (M. Sars, 1865) (original description)
Ampharete goesi Malmgren, 1866 (original description)
Ampharete gracilis Malmgren, 1866 accepted as Anobothrus gracilis (Malmgren, 1866) (original description)
Ampharete grubei Malmgren, 1865 (original description)
Ampharetidae Malmgren, 1866 (original description)
Amphicteis gunneri (M. Sars, 1835) (additional source)
Amphicteis sundevalli Malmgren, 1866 (original description)
Amphictene auricoma (O.F. Müller, 1776) (additional source)
Amphitrite Müller, 1771 (additional source)
Amphitrite affinis Malmgren, 1866 represented as Neoamphitrite affinis (Malmgren, 1866) (original description)
Amphitrite cirrata Müller, 1776 (additional source)
Amphitrite groenlandica Malmgren, 1866 represented as Neoamphitrite groenlandica (Malmgren, 1866) (original description)
Amphitrite johnstoni Malmgren, 1866 accepted as Neoamphitrite figulus (Dalyell, 1853) (original description)
Amphitritinae Malmgren, 1866 accepted as Terebellinae Johnston, 1846 (original description)
Aphrodita lepidota Pallas, 1766 accepted as Harmothoe imbricata (Linnaeus, 1767) (source of synonymy)
Artacama Malmgren, 1866 (original description)
Artacama proboscidea Malmgren, 1866 (original description)
Axionice Malmgren, 1866 (original description)
Axionice flexuosa (Grube, 1860) (new combination reference)
Chone Krøyer, 1856 (additional source)
Chone infundibuliformis Krøyer, 1856 (additional source)
Cistena pallassii Leach, 1816 accepted as Pectinaria belgica (Pallas, 1766) (source of synonymy)
Cistenides Malmgren, 1866 (original description)
Cistenides granulata (Linnaeus, 1767) (new combination reference)
Cistenides hyperborea Malmgren, 1866 (original description)
Crossostoma midas Gosse, 1855 accepted as Amphicteis midas (Gosse, 1855) (source of synonymy)
Euchone Malmgren, 1866 (original description)
Euchone analis (Krøyer, 1856) (new combination reference)
Euchone papillosa (Sars, 1851) (additional source)
Euchone rubrocincta (Sars, 1862) (additional source)
Lagis Malmgren, 1866 (original description)
Lagis koreni Malmgren, 1866 (original description)
Lanassa Malmgren, 1866 (original description)
Lanassa nordenskioldi Malmgren, 1866 (original description)
Lanice Malmgren, 1866 (original description)
Lanice conchilega (Pallas, 1766) (new combination reference)
Laonome Malmgren, 1866 (original description)
Laonome kroyeri Malmgren, 1866 (original description)
Laphania Malmgren, 1866 (original description)
Laphania boecki Malmgren, 1866 (original description)
Leaena Malmgren, 1866 (original description)
Leaena abranchiata Malmgren, 1866 accepted as Leaena ebranchiata (M. Sars, 1865) (original description)
Loimia Malmgren, 1866 (original description)
Loimia medusa (Savigny, 1822) (new combination reference)
Lysilla Malmgren, 1866 (original description)
Lysilla loveni Malmgren, 1866 (original description)
Lysippe Malmgren, 1866 (original description)
Lysippe labiata Malmgren, 1866 (original description)
Melinna Malmgren, 1866 (original description)
Melinna cristata (M. Sars, 1851) (new combination reference)
Myxicola steenstrupii Krøyer, 1856 (redescription)
Nicolea Malmgren, 1866 (original description)
Nicolea zostericola Örsted, 1844 (new combination reference)
Pectinaria belgica (Pallas, 1766) (additional source)
Pectinaria belgica sensu Malmgren, 1866 accepted as Pectinaria belgica (Pallas, 1766) (basis of record)
Petta Malmgren, 1866 (original description)
Petta pusilla Malmgren, 1866 (original description)
Pista Malmgren, 1866 (original description)
Pista cristata (Müller, 1776) (additional source)
Polycirrini Malmgren, 1866 (original description)
Polycirrus Grube, 1850 (additional source)
Polycirrus aurantiacus Grube, 1860 (additional source)
Potamilla Malmgren, 1866 (original description)
Potamilla neglecta (Sars, 1851) (new combination reference)
Potamilla torelli Malmgren, 1866 (original description)
Sabella crassicornis Sars, 1851 accepted as Bispira crassicornis (Sars, 1851) (additional source)
Sabella pavonia [auct. lapsus] accepted as Sabella pavonina Savigny, 1822 (basis of record)
Sabellides Milne Edwards in Lamarck, 1838 accepted as Ampharete Malmgren, 1866 (redescription)
Sabellides borealis M. Sars, 1856 accepted as Ampharete borealis (M. Sars, 1856) (additional source)
Sabellides octocirrata (M. Sars, 1835) accepted as Ampharete octocirrata (Sars, 1835) (additional source)
Samytha Malmgren, 1866 (original description)
Samytha sexcirrata (M. Sars, 1856) (new combination reference)
Sosane Malmgren, 1866 (original description)
Sosane sulcata Malmgren, 1866 (original description)
Spinther arcticus (M. Sars, 1851) (additional source)
Terebella Linnaeus, 1767 (additional source)
Terebella textrix Dalyell, 1853 accepted as Nicolea zostericola Örsted, 1844 (new combination reference)
Terebellides Sars, 1835 (additional source)
Terebellides stroemi [auctt. misspelling] accepted as Terebellides stroemii Sars, 1835 (additional source)
Thelepus Leuckart, 1849 (additional source)
Trichobranchidae Malmgren, 1866 (original description)
Trichobranchinae Malmgren, 1866 accepted as Trichobranchidae Malmgren, 1866 (original description)
Trichobranchus Malmgren, 1866 (original description)
Trichobranchus glacialis Malmgren, 1866 (original description)
Venusia Johnston, 1865 accepted as Thelepus Leuckart, 1849 (source of synonymy)
Venusia punctata Johnston, 1865 accepted as Thelepus cincinnatus (Fabricius, 1780) (source of synonymy)