Acrocirrus frontifilis (Grube, 1860) (additional source)
Ampharete grubei Malmgren, 1865 (taxonomy source)
Ampharete intermedia (Marion, 1875) (source of synonymy)
Amphiglena mediterranea (Leydig, 1851) (additional source)
Amphitrite gracilis (Grube, 1860) represented as Amphitritides gracilis (Grube, 1860) (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)
Aricia cuvieri [auct.] accepted as Orbinia cuvierii (Audouin & Milne Edwards, 1833) accepted as Orbinia sertulata (Savigny, 1822) (source of synonymy)
Aricia latreillii Audouin & Milne Edwards, 1833 accepted as Orbinia latreillii (Audouin & H Milne Edwards, 1833) (source of synonymy)
Armandia cirrhosa Filippi, 1861 (additional source)
Asychis biceps (M. Sars, 1861) accepted as Chirimia biceps biceps (Sars, 1861) (additional source)
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 brevis Lespés, 1872 (source of synonymy)
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)
Clymene modesta Quatrefages, 1866 accepted as Euclymene lombricoides (Quatrefages, 1866) (source of synonymy)
Clymene uranthus Savigny, 1822 (additional source)
Clymenella cincta (Saint-Joseph, 1894) (additional source)
Ctenodrilus serratus (Schmidt, 1857) (additional source)
Dasybranchus caducus (Grube, 1846) (additional source)
Dasychone bombyx (Dalyell, 1853) accepted as Branchiomma bombyx (Dalyell, 1853) (source of synonymy)
Dasychone lucullana (Delle Chiaje, 1828) accepted as Branchiomma lucullanum (Delle Chiaje, 1828) (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)
Euclymene lombricoides (Quatrefages, 1866) (additional source)
Euclymene oerstedii (Claparède, 1863) (additional source)
Euclymene santanderensis (Rioja, 1917) accepted as Macroclymene santanderensis (Rioja, 1917) (additional source)
Eupolymnia nesidensis (Delle Chiaje, 1828) (additional source)
Euthelepus setubalensis McIntosh, 1885 (additional source)
Flabelligera affinis M. Sars, 1829 (additional source)
Harmothoe reticulata (Claparède, 1870) (additional source)
Heterocirrus bioculatus (Keferstein, 1862) accepted as Caulleriella bioculata (Keferstein, 1862) (source of synonymy)
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)
Leiochone clypeata Saint-Joseph, 1894 accepted as Leiochone leiopygos (Grube, 1860) (additional source)
Lipobranchius jeffreysii (McIntosh, 1869) (basis of record)
Macrochaeta clavicornis (M. Sars, 1835) (additional source)
Malacoceros girardi Quatrefages, 1843 (source of synonymy)
Maldane cincta Saint-Joseph, 1894 (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)
Nerinides cantabra Rioja, 1918 accepted as Scolelepis (Scolelepis) cantabra (Rioja, 1918) (source of synonymy)
Nerinides cantabra Rioja, 1918 accepted as Scolelepis (Scolelepis) cantabra (Rioja, 1918) (basis of record)
Notomastus profundus Eisig, 1887 (additional source)
Ophelia neglecta Schneider, 1887 (additional source)
Ophelia radiata (Delle Chiaje, 1828) (additional source)
Oridia armandi (Claparède, 1864) accepted as Amphicorina armandi (Claparède, 1864) (basis of record)
Owenia filiformis Claparède, 1870 accepted as Owenia fusiformis Delle Chiaje, 1844 (source of synonymy)
Owenia fusiformis Delle Chiaje, 1844 (additional source)
Paraonis fulgens (Levinsen, 1884) (additional source)
Paraonis tenera Grube, 1873 (additional source)
Pectinaria bifurcata Blainville, 1828 (basis of record)
Pherusa incrustata Quatrefages, 1866 (source of synonymy)
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)
Polycirrus pellucida (Quatrefages, 1866) (basis of record)
Polydora (Boccardia) ligerica (Ferronnière, 1898) accepted as Boccardiella ligerica (Ferronnière, 1898) (basis of record)
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)
Polymnia nebulosa (Montagu, 1819) accepted as Eupolymnia nebulosa (Montagu, 1819) (source of synonymy)
Polyophthalmus pictus (Dujardin, 1839) (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 stichophthalmos (Grube, 1863) accepted as Hypsicomus stichophthalmos (Grube, 1863) (basis of record)
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)
Pseudomalacoceros cantabra (Rioja, 1918) accepted as Scolelepis (Scolelepis) cantabra (Rioja, 1918) (additional source)
Raphidrilus nemasoma Monticelli, 1910 (basis of record)
Sabella cucullus Quatrefages, 1866 (basis of record)