Acrocirrus frontifilis (Grube, 1860) (additional source)
Ampharete grubei Malmgren, 1865 (taxonomy source)
Amphiglena mediterranea (Leydig, 1851) (additional source)
Amphitrite floscula Dalyell, 1853 accepted as Myxicola infundibulum (Montagu, 1808) (source of synonymy)
Amphitrite johnstoni Malmgren, 1866 accepted as Neoamphitrite figulus (Dalyell, 1853) (additional source)
Apomatus globifer Théel, 1879 (source of synonymy)
Apomatus similis Marion & Bobretzky, 1875 (additional source)
Armandia cirrhosa Filippi, 1861 (additional source)
Armandia robertianae McIntosh, 1908 accepted as Polyophthalmus pictus (Dujardin, 1839) (source of synonymy)
Asychis biceps (M. Sars, 1861) accepted as Chirimia biceps biceps (Sars, 1861) (additional source)
Asychis jeffreysii McIntosh, 1915 accepted as Asychis biceps (M. Sars, 1861) accepted as Chirimia biceps biceps (Sars, 1861) (source of synonymy)
Axiothella constricta (Claparède, 1868) (additional source)
Bispira mariae Lo Bianco, 1893 (source of synonymy)
Bispira volutacornis (Montagu, 1804) (additional source)
Brada villosa (Rathke, 1843) accepted as Bradabyssa villosa (Rathke, 1843) (additional source)
Branchiomma vesiculosum (Montagu, 1815) accepted as Acromegalomma vesiculosum (Montagu, 1813) (additional source)
Capitella capitata (Fabricius, 1780) (additional source)
Caulleriella bioculata (Keferstein, 1862) (additional source)
Chaetopterus norvegicus M. Sars, 1835 (status source)
Chaetopterus sarsii Boeck in Sars, 1861 (source of synonymy)
Chaetopterus variopedatus (Renier, 1804) (additional source)
Chone infundibuliformis Krøyer, 1856 (source of synonymy)
Cirratulus caudatus Levinsen, 1893 (additional source)
Cirratulus filiformis Keferstein, 1862 accepted as Aphelochaeta filiformis (Keferstein, 1862) (additional source)
Clymene lophoseta Orlandi, 1898 accepted as Praxillella affinis (M. Sars in G.O. Sars, 1872) (additional source)
Clymenella cincta (Saint-Joseph, 1894) (additional source)
Ctenodrilus serratus (Schmidt, 1857) (additional source)
Dasybranchus caducus (Grube, 1846) (additional source)
Dinophilus gyrociliatus O. Schmidt, 1857 accepted as Dimorphilus gyrociliatus (O. Schmidt, 1857) (additional source)
Dinophilus vorticoides Schmidt, 1848 (additional source)
Diplocirrus glaucus (Malmgren, 1867) (additional source)
Dodecaceria concharum Örsted, 1843 (additional source)
Ehlersiella hirsuta Roule, 1896 (additional source)
Euclymene lombricoides (Quatrefages, 1866) (additional source)
Euclymene oerstedii (Claparède, 1863) (additional source)
Eumenia jeffreysii McIntosh, 1869 accepted as Lipobranchius jeffreysii (McIntosh, 1869) (source of synonymy)
Eupolymnia nesidensis (Delle Chiaje, 1828) (additional source)
Euspio gravieri McIntosh, 1915 accepted as Malacoceros tetracerus (Schmarda, 1861) (source of synonymy)
Euthelepus setubalensis McIntosh, 1885 (additional source)
Flabelligera affinis M. Sars, 1829 (additional source)
Harmothoe reticulata (Claparède, 1870) (additional source)
Heteromastus filiformis (Claparède, 1864) (additional source)
Hypsicomus phaeotaenia (Schmarda, 1861) accepted as Notaulax phaeotaenia (Schmarda, 1861) (additional source)
Jasmineira candela (Grube, 1863) accepted as Claviramus candelus (Grube, 1863) (additional source)
Johnstonia clymenoides Quatrefages, 1866 (additional source)
Lagis neapolitana (Claparède, 1869) (source of synonymy)
Lipobranchius jeffreysii (McIntosh, 1869) (basis of record)
Macrochaeta clavicornis (M. Sars, 1835) (additional source)
Malacoceros girardi Quatrefages, 1843 (source of synonymy)
Maldane glebifex Grube, 1860 (additional source)
Megalomma vesiculosum (Montagu, 1813) accepted as Acromegalomma vesiculosum (Montagu, 1813) (additional source)
Myxicola aesthetica (Claparède, 1870) (additional source)
Myxicola infundibulum (Montagu, 1808) (additional source)
Myxicola sarsii Krøyer, 1856 accepted as Myxicola infundibulum (Montagu, 1808) (source of synonymy)
Myxicola steenstrupii Krøyer, 1856 (source of synonymy)
Nerilla antennata Schmidt, 1848 (source of synonymy)
Notomastus profundus Eisig, 1887 (additional source)
Ophelia neglecta Schneider, 1887 (additional source)
Ophelia radiata (Delle Chiaje, 1828) (additional source)
Ophelia radiata barquii Fauvel, 1927 accepted as Ophelia barquii Fauvel, 1927 (original description)
Owenia fusiformis Delle Chiaje, 1844 (additional source)
Paraonis fulgens (Levinsen, 1884) (additional source)
Petaloproctus terricola Quatrefages, 1866 accepted as Petaloproctus terricolus Quatrefages, 1866 (additional source)
Pherusa eruca (Claparède, 1869) accepted as Piromis eruca (Claparède, 1869) (additional source)
Pherusa monilifera (Delle Chiaje, 1841) accepted as Stylarioides moniliferus Delle Chiaje, 1841 (additional source)
Pherusa plumosa (Müller, 1776) (additional source)
Pista cretacea (Grube, 1860) (additional source)
Polychaeta (identification resource)
Polycirrus arenivorus Caullery, 1916 (additional source)
Polycirrus haematodes (Claparède, 1864) (additional source)
Polycirrus pallidus (Claparède, 1864) (additional source)
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)
Polygordius lacteus Schneider, 1868 (additional source)
Polyophthalmus pictus (Dujardin, 1839) (additional source)
Pomatoceros lamarckii (Quatrefages, 1866) accepted as Pomatoceros lamarcki (Quatrefages, 1866) accepted as Spirobranchus lamarcki (Quatrefages, 1866) (additional source)
Pomatoceros triqueter (Linnaeus, 1758) accepted as Spirobranchus triqueter (Linnaeus, 1758) (additional source)
Potamilla reniformis (Bruguière, 1789) accepted as Pseudopotamilla reniformis (Bruguière, 1789) (taxonomy source)
Potamilla torelli Malmgren, 1866 (additional source)
Praxillella affinis (M. Sars in G.O. Sars, 1872) (additional source)
Prionospio decipiens Söderström, 1920 (additional source)
Protula intestinum (Lamarck, 1818) (additional source)
Protula lusitanica McIntosh, 1885 (status source)
Pseudomalacoceros cantabra (Rioja, 1918) accepted as Scolelepis (Scolelepis) cantabra (Rioja, 1918) (additional source)
Raphidrilus nemasoma Monticelli, 1910 (basis of record)
Sabella pavonina Savigny, 1822 (additional source)
Sabellaria alveolata (Linnaeus, 1767) (additional source)
Sabellides octocirrata (M. Sars, 1835) accepted as Ampharete octocirrata (Sars, 1835) (additional source)
Scolelepis ciliata (Keferstein, 1862) accepted as Malacoceros tetracerus (Schmarda, 1861) (additional source)
Scolelepis girardi (Quatrefages, 1843) accepted as Malacoceros girardi Quatrefages, 1843 (additional source)
Scoloplos armiger (Müller, 1776) (additional source)
Serpula vermicularis Linnaeus, 1767 (additional source)
Siphonostoma buskii McIntosh, 1869 accepted as Flabelligera affinis M. Sars, 1829 (source of synonymy)
Spio filicornis (Müller, 1776) (additional source)
Spio multioculata (Rioja, 1918) (additional source)
Spiophanes bombyx (Claparède, 1870) (additional source)
Spirographis spallanzanii (Gmelin, 1791) accepted as Sabella spallanzanii (Gmelin, 1791) (source of synonymy)
Sternaspis scutata (Ranzani, 1817) (source of synonymy)
Streblospio shrubsolii (Buchanan, 1890) (additional source)