Aphrodita aculeata Linnaeus, 1758 (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 blomstrandi Malmgren, 1867 (additional source)
Exogone (Parexogone) hebes (Webster & Benedict, 1884) accepted as Parexogone hebes (Webster & Benedict, 1884) (additional source)
Exogoninae Langerhans, 1879 (additional source)
Glycera alba (O.F. Müller, 1776) (additional source)
Glycera capitata Örsted, 1842 (additional source)
Glycera convoluta Keferstein, 1862 accepted as Glycera tridactyla Schmarda, 1861 (additional source)
Harmothoe impar (Johnston, 1839) (source of synonymy)
Harmothoe spinifera (Ehlers, 1864) (additional source)
Lagisca extenuata (Grube, 1840) accepted as Harmothoe extenuata (Grube, 1840) (additional source)
Neanthes succinea (Leuckart, 1847) accepted as Alitta succinea (Leuckart, 1847) (additional source)
Nereis pelagica Linnaeus, 1758 (additional source)
Ophiodromus flexuosus (Delle Chiaje, 1827) accepted as Oxydromus flexuosus (Delle Chiaje, 1827) (additional source)
Opisthodonta Langerhans, 1879 (additional source)
Phyllodoce laminosa Savigny in Lamarck, 1818 (source of synonymy)
Phyllodoce lineata (Claparède, 1870) (source of synonymy)
Polychaeta (identification resource)
Sphaerosyllis hystrix Claparède, 1863 (additional source)
Sthenelais boa (Johnston, 1833) (additional source)
Streptodonta pterochaeta (Southern, 1914) (additional source)
Streptosyllis Webster & Benedict, 1884 (additional source)
Streptosyllis websteri Southern, 1914 (additional source)
Syllinae Grube, 1850 (additional source)
Syllis gracilis Grube, 1840 (additional source)