Apomatus globifer Théel, 1879 (source of synonymy)
Apomatus similis Marion & Bobretzky, 1875 (additional source)
Asychis biceps (M. Sars, 1861) accepted as Chirimia biceps biceps (Sars, 1861) (additional source)
Brada villosa (Rathke, 1843) accepted as Bradabyssa villosa (Rathke, 1843) (additional source)
Capitella capitata (Fabricius, 1780) (additional source)
Chone infundibuliformis Krøyer, 1856 (source of synonymy)
Dinophilus vorticoides Schmidt, 1848 (additional source)
Diplocirrus glaucus (Malmgren, 1867) (additional source)
Dodecaceria concharum Örsted, 1843 (additional source)
Eupolymnia nesidensis (Delle Chiaje, 1828) (additional source)
Flabelligera affinis M. Sars, 1829 (additional source)
Heteromastus filiformis (Claparède, 1864) (additional source)
Myxicola infundibulum (Montagu, 1808) (additional source)
Myxicola sarsii Krøyer, 1856 accepted as Myxicola infundibulum (Montagu, 1808) (source of synonymy)
Nerilla antennata Schmidt, 1848 (source of synonymy)
Owenia fusiformis Delle Chiaje, 1844 (additional source)
Pherusa plumosa (Müller, 1776) (additional source)
Polychaeta (identification resource)
Polydora caeca (Örsted, 1843) accepted as Dipolydora coeca (Örsted, 1843) (additional source)
Polydora ciliata (Johnston, 1838) (additional source)
Polydora flava Claparède, 1870 accepted as Dipolydora flava (Claparède, 1870) (additional source)
Pomatoceros triqueter (Linnaeus, 1758) accepted as Spirobranchus triqueter (Linnaeus, 1758) (additional source)
Potamilla torelli Malmgren, 1866 (additional source)
Praxillella affinis (M. Sars in G.O. Sars, 1872) (additional source)
Sabella pavonina Savigny, 1822 (additional source)
Scoloplos armiger (Müller, 1776) (additional source)
Spio filicornis (Müller, 1776) (additional source)
Spiophanes bombyx (Claparède, 1870) (additional source)
Sternaspis scutata (Ranzani, 1817) (source of synonymy)
Thelepus cincinnatus (Fabricius, 1780) (source of synonymy)