Amblyosyllis formosa (Claparède, 1863) accepted as Amblyosyllis spectabilis (Johnston in Baird, 1861) (additional source)
Aphrodita aculeata Linnaeus, 1758 (additional source)
Erinaceusyllis erinaceus (Claparède, 1863) (additional source)
Eulalia bilineata (Johnston, 1840) (additional source)
Eulalia viridis (Linnaeus, 1767) (additional source)
Eumida sanguinea (Örsted, 1843) (additional source)
Eusyllinae Malaquin, 1893 (additional source)
Eusyllis Malmgren, 1867 (additional source)
Eusyllis assimilis Marenzeller, 1875 (additional source)
Eusyllis blomstrandi Malmgren, 1867 (additional source)
Eusyllis lamelligera Marion & Bobretzky, 1875 (additional source)
Exogone gemmifera Pagenstecher, 1862 accepted as Exogone naidina Örsted, 1845 (source of synonymy)
Exogone gemmifera Pagenstecher, 1862 accepted as Exogone naidina Örsted, 1845 (additional source)
Exogoninae Langerhans, 1879 (additional source)
Glycera alba (O.F. Müller, 1776) (additional source)
Glycera capitata Örsted, 1842 (additional source)
Harmothoe impar (Johnston, 1839) (source of synonymy)
Harmothoe longisetis (Grube, 1863) (source of synonymy)
Harmothoe longisetis Auctt. non Grube, 1863 accepted as Harmothoe glabra (Malmgren, 1865) (source of synonymy)
Kefersteinia Quatrefages, 1866 accepted as Psamathe Johnston, 1836 (additional source)
Kefersteinia cirrhata (Keferstein, 1862) accepted as Psamathe cirrhata Keferstein, 1862 (additional source)
Laetmonice filicornis Kinberg, 1856 (additional source)
Nereis pelagica Linnaeus, 1758 (additional source)
Nereis zonata Malmgren, 1867 (additional source)
Onuphis conchylega M. Sars, 1835 accepted as Nothria conchylega (Sars, 1835) (source of synonymy)
Ophryotrocha puerilis Claparède & Mecznikow, 1869 (additional source)
Ophryotrocha puerilis siberti (McIntosh, 1885) accepted as Ophryotrocha siberti (McIntosh, 1885) (status source)
Pionosyllis Malmgren, 1867 (additional source)
Polychaeta (identification resource)
Syllides Örsted, 1845 (additional source)
Syllides longocirrata (Örsted, 1845) accepted as Syllides longocirratus (Örsted, 1845) (taxonomy source)
Syllides longocirratus (Örsted, 1845) (additional source)
Syllinae Grube, 1850 (additional source)
Syllis cornuta Rathke, 1843 (additional source)