Aglaophamus circinata (Verrill in Smith & Harger, 1874) (new combination reference)
Alentiana aurantiaca (Verrill, 1885) (additional source)
Amblyosyllis finmarchica (Malmgren, 1867) (additional source)
Anaitides maculata (Linnaeus, 1767) accepted as Phyllodoce maculata (Linnaeus, 1767) (additional source)
Aphrodita hastata Moore, 1905 (identification resource)
Apistobranchus typicus (Webster & Benedict, 1887) (additional source)
Autolytus cornutus Agassiz, 1862 accepted as Proceraea cornuta (Agassiz, 1862) (additional source)
Dysponetus pygmaeus Levinsen, 1879 (source of synonymy)
Enipo canadensis (McIntosh, 1874) (identification resource)
Eteone lactea Claparède, 1868 accepted as Hypereteone lactea (Claparède, 1868) (source of synonymy)
Eteone longa (Fabricius, 1780) (source of synonymy)
Eulalia bilineata (Johnston, 1840) (source of synonymy)
Eulalia viridis (Linnaeus, 1767) (additional source)
Eumida sanguinea (Örsted, 1843) (source of synonymy)
Eunice norvegica (Linnaeus, 1767) (source of synonymy)
Euphrosine armadillo M. Sars, 1851 (additional source)
Euphrosine borealis Örsted, 1843 (additional source)
Eusyllis blomstrandi Malmgren, 1867 (source of synonymy)
Exogone verugera (Claparède, 1868) (additional source)
Gattyana cirrhosa (Pallas, 1766) (redescription)
Grubea Quatrefages, 1866 accepted as Salvatoria McIntosh, 1885 (subsequent type designation)
Grubea dolichopoda Webster, 1879 accepted as Salvatoria clavata (Claparède, 1863) (source of synonymy)
Harmothoe fragilis Moore, 1910 (additional source)
Harmothoe imbricata (Linnaeus, 1767) (additional source)
Hipponoa gaudichaudi [Auct. genus misspelling] accepted as Hipponoe gaudichaudi Audouin & Milne Edwards, 1830 (source of synonymy)
Laetmonice filicornis Kinberg, 1856 (additional source)
Lagisca rarispina (Sars, 1861) accepted as Harmothoe rarispina (M. Sars, 1861) (additional source)
Lepidametria commensalis Webster, 1879 (redescription)
Lepidasthenia commensalis (Webster, 1879) accepted as Lepidametria commensalis Webster, 1879 (source of synonymy)
Lumbrineris Blainville, 1828 (taxonomy source)
Lumbrineris brevipes (McIntosh, 1903) accepted as Paraninoe brevipes (McIntosh, 1903) (additional source)
Lumbrineris fragilis (O.F. Müller, 1776) accepted as Scoletoma fragilis (O.F. Müller, 1776) (source of synonymy)
Marphysa sanguinea (Montagu, 1813) (additional source)
Microphthalmus sczelkowii Mecznikow, 1865 (taxonomy source)
Neanthes diversicolor (Müller, 1776) accepted as Hediste diversicolor (O.F. Müller, 1776) (new combination reference)
Nemidia Malmgren, 1865 accepted as Enipo Malmgren, 1865 (source of synonymy)
Nemidia torelli Malmgren, 1865 accepted as Enipo torelli (Malmgren, 1865) (source of synonymy)
Nephtys incisa Malmgren, 1865 (additional source)
Nephtys paradoxa Malm, 1874 (additional source)
Nereis (Hediste) diversicolor O.F. Müller, 1776 accepted as Hediste diversicolor (O.F. Müller, 1776) (additional source)
Odontosyllis fulgurans (Audouin & Milne Edwards, 1833) (source of synonymy)
Orbinia (Phylo) kupfferi (Ehlers, 1874) accepted as Phylo kupfferi (Ehlers, 1874) (additional source)
Paedophylax Claparède, 1868 accepted as Exogone Örsted, 1845 (subsequent type designation)
Paralacydonia Fauvel, 1913 (taxonomy source)
Paralacydoniidae Pettibone, 1963 (original description)
Paranaitis speciosa (Webster, 1879) (additional source)
Parapionosyllis longicirrata (Webster & Benedict, 1884) (additional source)
Phyllodoce arenae Webster, 1879 (source of synonymy)
Sphaerodorum gracilis (Rathke, 1843) (source of synonymy)
Sphaerosyllis erinaceus Claparède, 1863 accepted as Erinaceusyllis erinaceus (Claparède, 1863) (additional source)
Sphaerosyllis longicauda Webster & Benedict, 1887 accepted as Prosphaerosyllis longicauda (Webster & Benedict, 1887) (source of synonymy)
Spinther citrinus (Stimpson, 1853) (taxonomy source)
Sthenelais limicola (Ehlers, 1864) (additional source)
Streptosyllis varians Webster & Benedict, 1887 (additional source)
Syllides longocirrata (Örsted, 1845) accepted as Syllides longocirratus (Örsted, 1845) (source of synonymy)
Syllides setosa Verrill, 1882 (additional source)
Syllis cornuta Rathke, 1843 (source of synonymy)
Tomopteris helgolandica Greeff, 1879 represented as Tomopteris (Johnstonella) helgolandica (Greeff, 1879) (source of synonymy)
Trochochaeta Levinsen, 1884 (taxonomy source)
Trochochaetidae Pettibone, 1963 (original description)