Amblyosyllis lineata Grube, 1863 (additional source)
Anaitis Malmgren, 1865 accepted as Paranaitis Southern, 1914 (source of synonymy)
Aonides paucibranchiata Southern, 1914 (original description)
Autolytus edwarsi Saint Joseph, 1887 accepted as Myrianida edwarsi (Saint Joseph, 1887) (additional source)
Autolytus ehbiensis Saint Joseph, 1887 accepted as Myrianida prolifera (O.F. Müller, 1788) (additional source)
Autolytus longeferiens Saint Joseph, 1887 accepted as Epigamia alexandri (Malmgren, 1867) (additional source)
Autolytus pictus (Ehlers, 1864) accepted as Proceraea picta Ehlers, 1864 (additional source)
Autolytus prolifer (O. F. Müller, 1788) accepted as Myrianida prolifera (O.F. Müller, 1788) (additional source)
Autolytus punctatus Saint Joseph, 1887 accepted as Myrianida brachycephala (Marenzeller, 1874) (additional source)
Autolytus rubropunctatus (Grube, 1860) accepted as Myrianida rubropunctata (Grube, 1860) (additional source)
Castalia Savigny, 1822 accepted as Nereimyra Blainville, 1828 (additional source)
Chaetozone zetlandica McIntosh, 1911 (redescription)
Chone filicaudata Southern, 1914 (original description)
Eteone caeca Ehlers, 1874 accepted as Hypereteone foliosa (Quatrefages, 1865) (source of synonymy)
Eteone foliosa Quatrefages, 1866 accepted as Hypereteone foliosa (Quatrefages, 1865) (additional source)
Euchone rosea Langerhans, 1884 (additional source)
Euphrosyne foliosa Audouin & Milne Edwards, 1833 accepted as Euphrosine foliosa Audouin & H Milne Edwards, 1833 (additional source)
Eurysyllis paradoxa (Claparède, 1864) accepted as Eurysyllis tuberculata Ehlers, 1864 (additional source)
Eusyllis blomstrandi Malmgren, 1867 (source of synonymy)
Eusyllis tubifex (Gosse, 1855) (additional source)
Exogone gemmifera Pagenstecher, 1862 accepted as Exogone naidina Örsted, 1845 (additional source)
Gattyana cirrosa [auctt. misspelling] accepted as Gattyana cirrhosa (Pallas, 1766) (additional source)
Grubea clavata (Claparède, 1863) accepted as Salvatoria clavata (Claparède, 1863) (additional source)
Grubea pusilla (Dujardin, 1851) accepted as Brania pusilla (Dujardin, 1851) (additional source)
Halosydna gelatinosa (Sars, 1835) accepted as Alentia gelatinosa (M. Sars, 1835) (additional source)
Harmothoe imbricata (Linnaeus, 1767) (additional source)
Harmothoe lunulata (Delle Chiaje, 1830) accepted as Malmgrenia lunulata (Delle Chiaje, 1830) (additional source)
Harmothoe spinifera (Ehlers, 1864) (additional source)
Harmothoe zetlandica McIntosh, 1876 accepted as Malmgrenia ljungmani (Malmgren, 1867) (additional source)
Lagisca floccosa (Savigny, 1818) (additional source)
Lepidonotus clava (Montagu, 1808) (additional source)
Lepidonotus squamatus (Linnaeus, 1758) (additional source)
Marphysa fallax Marion & Bobretzky, 1875 accepted as Paucibranchia fallax (Marion & Bobretzky, 1875) (additional source)
Microphthalmus Mecznikow, 1865 (additional source)
Microphthalmus sczelkowii Mecznikow, 1865 (additional source)
Myrianida pinnigera (Montagu, 1808) (additional source)
Nerilla antennata Schmidt, 1848 (additional source)
Nicomache maculata Arwidsson, 1911 (additional source)
Odontosyllis ctenostoma Claparède, 1868 (additional source)
Odontosyllis gibba Claparède, 1863 (additional source)
Ophiodromus flexuosus (Delle Chiaje, 1827) accepted as Oxydromus flexuosus (Delle Chiaje, 1827) (additional source)
Opisthodonta Langerhans, 1879 (additional source)
Opisthodonta pterochaeta Southern, 1914 accepted as Streptodonta pterochaeta (Southern, 1914) (original description)
Paedophylax hebes Webster & Benedict, 1884 accepted as Parexogone hebes (Webster & Benedict, 1884) (new combination reference)
Paranaitis Southern, 1914 (original description)
Paranaitis kosteriensis (Malmgren, 1867) (additional source)
Paranaitis wahlbergi (Malmgren, 1865) (new combination reference)
Pholoe tuberculata Southern, 1914 accepted as Pholoe baltica Örsted, 1843 (original description)
Pionosyllis lamelligera Saint Joseph, 1887 accepted as Synmerosyllis lamelligera (Saint-Joseph, 1887) (additional source)
Pionosyllis pulligera (Krohn, 1852) accepted as Nudisyllis pulligera (Krohn, 1852) (basis of record)
Pionosyllis serrata Southern, 1914 accepted as Nudisyllis pulligera (Krohn, 1852) (original description)
Pisionidae Ehlers, 1901 accepted as Pisioninae Ehlers, 1901 (additional source)
Polygordius appendiculatus Fraipont, 1887 (additional source)
Polygordius lacteus Schneider, 1868 (additional source)
Proclea graffi [auctt.] accepted as Proclea graffii (Langerhans, 1884) (basis of record)
Scalisetosus communis (Delle Chiaje, 1841) accepted as Lysidice communis Delle Chiaje, 1841 (additional source)
Sphaerosyllis bulbosa Southern, 1914 (original description)
Sphaerosyllis erinaceus Claparède, 1863 accepted as Erinaceusyllis erinaceus (Claparède, 1863) (additional source)
Sphaerosyllis hystrix Claparède, 1863 (additional source)
Spio martinensis Mesnil, 1896 (additional source)
Sthenelais zetlandica McIntosh, 1876 accepted as Fimbriosthenelais zetlandica (McIntosh, 1876) (additional source)
Streptosyllis Webster & Benedict, 1884 (redescription)
Streptosyllis bidentata Southern, 1914 (original description)
Streptosyllis websteri Southern, 1914 (original description)
Syllis (Ehlersia) cornuta Rathke, 1843 accepted as Syllis cornuta Rathke, 1843 (additional source)
Syllis (Ehlersia) ferrugina (Langerhans, 1881) accepted as Paraehlersia ferrugina (Langerhans, 1881) (additional source)
Syllis (Ehlersia) simplex (Langerhans, 1879) accepted as Syllis amica Quatrefages, 1866 (additional source)
Syllis (Haplosyllis) spongicola Grube, 1855 accepted as Haplosyllis spongicola (Grube, 1855) (new combination reference)
Syllis (Syllis) gracilis Grube, 1840 accepted as Syllis gracilis Grube, 1840 (additional source)
Syllis (Typosyllis) alternosetosa Saint Joseph, 1887 accepted as Syllis armillaris (O.F. Müller, 1776) (source of synonymy)
Syllis (Typosyllis) armillaris (O.F. Müller, 1776) accepted as Syllis armillaris (O.F. Müller, 1776) (additional source)
Syllis (Typosyllis) hyalina Grube, 1863 accepted as Syllis hyalina Grube, 1863 (additional source)
Syllis (Typosyllis) krohnii Ehlers, 1864 accepted as Syllis krohnii Ehlers, 1864 (additional source)
Syllis (Typosyllis) prolifera Krohn, 1852 accepted as Syllis prolifera Krohn, 1852 (additional source)
Syllis (Typosyllis) variegata Grube, 1860 accepted as Syllis variegata Grube, 1860 (additional source)
Syllis (Typosyllis) vittata Grube, 1840 accepted as Syllis vittata Grube, 1840 (additional source)
Syllis pulligera Krohn, 1852 accepted as Nudisyllis pulligera (Krohn, 1852) (source of synonymy)
Trypanosyllis coeliaca Claparède, 1868 accepted as Pseudosyllis brevipennis Grube, 1863 (additional source)
Trypanosyllis zebra (Grube, 1860) (additional source)