Amblyosyllis lineolata (A. Costa, 1864) accepted as Amblyosyllis spectabilis (Johnston in Baird, 1861) (additional source)
Anaitides groenlandica (Örsted, 1842) accepted as Phyllodoce groenlandica Örsted, 1842 (additional source)
Anaitides maculata (Linnaeus, 1767) accepted as Phyllodoce maculata (Linnaeus, 1767) (additional source)
Autolytus agassizii Quatrefages, 1866 accepted as Myrianida prolifera (O.F. Müller, 1788) (source of synonymy)
Autolytus aurantiacus (Claparède, 1868) accepted as Proceraea aurantiaca Claparède, 1868 (additional source)
Autolytus fallax Malmgren, 1867 accepted as Proceraea cornuta (Agassiz, 1862) (source of synonymy)
Autolytus prolifera (O.F. Müller, 1788) accepted as Myrianida prolifera (O.F. Müller, 1788) (additional source)
Eteone spetsbergensis Malmgren, 1865 (additional source)
Eulalia aurea Gravier, 1896 (source of synonymy)
Eulalia ellipsis (Dalyell, 1853) (basis of record)
Eulalia nebulosa Parfitt, 1867 in McIntosh, 1908 accepted as Eumida punctifera (Grube, 1860) (original description)
Eulalia ornata Saint-Joseph, 1888 (source of synonymy)
Eulalia viridis (Linnaeus, 1767) (additional source)
Eulalia viridis aurea Gravier, 1896 accepted as Eulalia aurea Gravier, 1896 (basis of record)
Eulalia viridis ornata Saint-Joseph, 1888 accepted as Eulalia ornata Saint-Joseph, 1888 (basis of record)
Eumida sanguinea (Örsted, 1843) (additional source)
Eusyllis tubifex (Gosse, 1855) (additional source)
Exogone gemmifera echarffi McIntosh, 1908 (original description)
Exogone naidina Örsted, 1845 (basis of record)
Genetyllis hibernica McIntosh, 1908 (original description)
Haplosyllis spongicola (Grube, 1855) (additional source)
Ioda macrophthalma [auctt.] accepted as Ioida macrophthalma Johnston, 1840 accepted as Syllis armillaris (O.F. Müller, 1776) (source of synonymy)
Microsyllis marenzelleri McIntosh, 1908 accepted as Exogone marenzelleri McIntosh, 1908 (original description)
Myrianida fasciata Milne Edwards, 1845 accepted as Myrianida pinnigera (Montagu, 1808) (source of synonymy)
Myrianida pinnigera (Montagu, 1808) (additional source)
Mystides lizziae McIntosh, 1908 accepted as Paranaitis kosteriensis (Malmgren, 1867) (original description)
Nephthys hombergi [auct. misspellings] accepted as Nephtys hombergii Savigny in Lamarck, 1818 (source of synonymy)
Nephthys hombergi var. kersivalensis McIntosh, 1908 accepted as Nephtys kersivalensis McIntosh, 1908 (original description)
Nephtys caeca (Fabricius, 1780) (additional source)
Nereimyra punctata (Müller, 1788) (additional source)
Nereiphylla paretti Blainville, 1828 (additional source)
Nereis ellipsis Dalyell, 1853 accepted as Eulalia ellipsis (Dalyell, 1853) (source of synonymy)
Nereis foliosa Leach in Johnston, 1865 accepted as Phyllodoce lamelligera (Gmelin in Linnaeus, 1788) (source of synonymy)
Nereis maculosa Montagu, 1813 accepted as Myrianida pinnigera (Montagu, 1808) (source of synonymy)
Nereis remex Dalyell, 1853 accepted as Phyllodoce lamelligera (Gmelin in Linnaeus, 1788) (source of synonymy)
Notophyllum foliosum (Sars, 1835) (additional source)
Odontosyllis ctenostoma Claparède, 1868 (additional source)
Odontosyllis gibba Claparède, 1863 (taxonomy source)
Odontosyllis gibba robertianae McIntosh, 1908 (original description)
Odontosyllis virescens Marenzeller, 1874 accepted as Odontosyllis ctenostoma Claparède, 1868 (source of synonymy)
Ophiodromus flexuosus (Delle Chiaje, 1827) accepted as Oxydromus flexuosus (Delle Chiaje, 1827) (additional source)
Phyllodoce attenuata Carrington, 1865 (source of synonymy)
Phyllodoce cordifolia Johnston, 1865 (basis of record)
Phyllodoce gervillei Audouin & Milne Edwards, 1833 accepted as Eulalia viridis (Linnaeus, 1767) (source of synonymy)
Phyllodoce griffithsii Johnston, 1865 (basis of record)
Phyllodoce lamelligera (Gmelin in Linnaeus, 1788) (source of synonymy)
Phyllodoce maculata (Linnaeus, 1767) (source of synonymy)
Pionosyllis divaricata (Keferstein, 1862) accepted as Nudisyllis divaricata (Keferstein, 1862) (basis of record)
Pionosyllis longocirrata Saint-Joseph, 1887 accepted as Opisthodonta longocirrata (Saint-Joseph, 1887) (source of synonymy)
Pionosyllis prolifera (Krohn, 1852) accepted as Syllis prolifera Krohn, 1852 (source of synonymy)
Proceraea luxurians Marenzeller, 1874 accepted as Myrianida brachycephala (Marenzeller, 1874) (source of synonymy)
Psamathe fusca Johnston, 1836 (additional source)
Psamathe fusca Johnston, 1836 (source of synonymy)
Syllis armillaris (O.F. Müller, 1776) (source of synonymy)
Syllis brevicirrata McIntosh, 1908 (original description)
Syllis brevicornis Grube, 1863 accepted as Odontosyllis gibba Claparède, 1863 (source of synonymy)
Syllis buskii McIntosh, 1908 accepted as Syllis vittata Grube, 1840 (original description)
Syllis cornuta collingsii McIntosh, 1908 (original description)
Syllis cucullata McIntosh, 1908 accepted as Odontosyllis cucullata (McIntosh, 1908) (original description)
Syllis cunninghami McIntosh, 1908 accepted as Syllis amica Quatrefages, 1866 (original description)
Syllis divaricata Keferstein, 1862 accepted as Nudisyllis divaricata (Keferstein, 1862) (source of synonymy)
Syllis longiseta Gosse, 1855 accepted as Exogone naidina Örsted, 1845 (source of synonymy)
Syllis normannica Claparède, 1863 accepted as Nudisyllis divaricata (Keferstein, 1862) (source of synonymy)
Syllis oligochaeta Bobretzky, 1870 accepted as Haplosyllis spongicola (Grube, 1855) (source of synonymy)