Ampharete gracilis Malmgren, 1866 accepted as Anobothrus gracilis (Malmgren, 1866) (source of synonymy)
Anaitides maculata (Linnaeus, 1767) accepted as Phyllodoce maculata (Linnaeus, 1767) (basis of record)
Aphrodita squamata Linnaeus, 1758 accepted as Lepidonotus squamatus (Linnaeus, 1758) (source of synonymy)
Aricidea jeffreysi [auctt.] accepted as Aricidea jeffreysii [Auctt. (Non McIntosh, 1879)] accepted as Aricidea (Acmira) cerrutii Laubier, 1966 (basis of record)
Artacama proboscidea Malmgren, 1866 (additional source)
Autolytus lugens mediterraneus Cognetti, 1953 accepted as Myrianida quindecimdentata (Langerhans, 1884) (source of synonymy)
Autolytus quindecimdentatus Langerhans, 1884 accepted as Myrianida quindecimdentata (Langerhans, 1884) (additional source)
Calamyzinae Hartmann-Schröder, 1971 (original description)
Clymenura borealis (Arwidsson, 1906) (additional source)
Errantia (additional source)
Eteone flava (Fabricius, 1780) (additional source)
Eteone fucata M. Sars in G.O. Sars, 1872 accepted as Eteone flava (Fabricius, 1780) (source of synonymy)
Eteone lactea Claparède, 1868 accepted as Hypereteone lactea (Claparède, 1868) (basis of record)
Euclymene praetermissa (Malmgren, 1865) accepted as Praxillella praetermissa (Malmgren, 1865) (basis of record)
Eumida (Pirakia) fucescens [auct. misspelling] accepted as Eulalia fuscescens Saint-Joseph, 1888 (basis of record)
Eumida fusigera (Malmgren, 1865) accepted as Sige fusigera Malmgren, 1865 (additional source)
Euzonus flabelliferus (Ziegelmeier, 1955) accepted as Thoracophelia flabellifera Ziegelmeier, 1955 (basis of record)
Exogone (Exogone) dispar (Webster, 1879) accepted as Exogone dispar (Webster, 1879) (additional source)
Fabricia stellaris stellaris (O. F. Müller, 1774) (additional source)
Gyptis rosea (Malm, 1874) accepted as Neogyptis rosea (Malm, 1874) (taxonomy source)
Harmothoe micraspis Eliason, 1962 (additional source)
Hesioninae Grube, 1850 (status source)
Hesionura augeneri (Friedrich, 1937) accepted as Hesionura elongata (Southern, 1914) (additional source)
Jugaria Knight-Jones, 1978 represented as Bushiella (Jugaria) Knight-Jones, 1978 (additional source)
Lanassa venusta (Malm, 1874) (additional source)
Laphaniella venusta Malm, 1874 accepted as Lanassa venusta (Malm, 1874) (source of synonymy)
Leiochone borealis Arwidsson, 1906 accepted as Clymenura borealis (Arwidsson, 1906) (basis of record)
Macellicephalinae Hartmann-Schröder, 1971 (original description)
Microphthalmidae Hartmann-Schröder, 1971 (original description)
Microphthalmus aberrans (Webster & Benedict, 1887) (additional source)
Microphthalmus sczelkowii cantabrica Rioja, 1925 accepted as Microphthalmus aberrans (Webster & Benedict, 1887) (source of synonymy)
Microspio armata Thulin, 1957 accepted as Spio armata (Thulin, 1957) (source of synonymy)
Mysta picta (Quatrefages, 1866) (basis of record)
Nereis (Eunereis) elitoralis Eliason, 1962 accepted as Nereis elitoralis Eliason, 1962 (new combination reference)
Nereis irrorata (Malmgren, 1867) accepted as Neanthes nubila (Savigny, 1822) (source of synonymy)
Nereis reibischi Heinen, 1911 accepted as Alitta succinea (Leuckart, 1847) (source of synonymy)
Odontosyllis ctenostoma Claparède, 1868 (additional source)
Onuphis quadricuspis M. Sars in G.O. Sars, 1872 accepted as Paradiopatra quadricuspis (M. Sars in G.O. Sars, 1872) (source of synonymy)
Ophelia cluthensis McGuire, 1935 accepted as Ophelia rathkei McIntosh, 1908 (status source)
Ophelia remanei Augener, 1939 accepted as Ophelia rathkei McIntosh, 1908 (status source)
Opheliidae Malmgren, 1867 (taxonomy source)
Ophelininae Hartmann-Schröder, 1971 (original description)
Ophiodromus roseus Malm, 1874 accepted as Neogyptis rosea (Malm, 1874) (source of synonymy)
Ophryotrocha isochaeta Eliason, 1962 accepted as Parophryotrocha isochaeta (Eliason, 1962) (source of synonymy)
Paedophylax dispar Webster, 1879 accepted as Exogone dispar (Webster, 1879) (basis of record)
Paedophylax dispar Webster, 1879 accepted as Exogone dispar (Webster, 1879) (source of synonymy)
Paradoneis armata Glémarec, 1966 (additional source)
Paraonis gracilis (Tauber, 1879) accepted as Levinsenia gracilis (Tauber, 1879) (basis of record)
Parophryotrocha Hartmann-Schröder, 1971 (original description)
Parophryotrocha isochaeta (Eliason, 1962) (basis of record)
Petaloproctus tenuis borealis Arwidsson, 1906 accepted as Petaloproctus borealis Ardwisson, 1906 (basis of record)
Pirakia Bergström, 1914 accepted as Eumida Malmgren, 1865 (additional source)
Polydora (Polydora) coeca Örsted, 1843 accepted as Dipolydora coeca (Örsted, 1843) (basis of record)
Polydora (Pseudopolydora) antennata Claparède, 1868 accepted as Pseudopolydora antennata (Claparède, 1868) (additional source)
Polydora caeca (Örsted, 1843) accepted as Dipolydora coeca (Örsted, 1843) (additional source)
Polydora saintjosephi Eliason, 1920 accepted as Dipolydora saintjosephi (Eliason, 1920) (source of synonymy)
Polynoe (Enipo) Malmgren, 1866 accepted as Enipo Malmgren, 1865 (basis of record)
Polynoe nodosa Sars, 1861 accepted as Eunoe nodosa (M. Sars, 1861) (basis of record)
Pterosyllis formosa Claparède, 1863 accepted as Amblyosyllis spectabilis (Johnston in Baird, 1861) (new combination reference)
Raphidrilinae Hartmann-Schröder, 1971 (original description)
Scalibregmidae Malmgren, 1867 accepted as Scalibregmatidae Malmgren, 1867 (additional source)
Scionella lornensis Pearson, 1969 accepted as Pista lornensis (Pearson, 1969) (additional source)
Sedentaria (additional source)
Sosane gracilis (Malmgren, 1866) accepted as Anobothrus gracilis (Malmgren, 1866) (basis of record)
Sphaerodoridium philippi (Fauvel, 1911) accepted as Sphaerodoropsis philippi (Fauvel, 1911) (additional source)
Sthenelais jeffreysii [auctt. misspelling for jeffreysi] accepted as Sthenelais jeffreysi McIntosh, 1876 (additional source)
Thoracophelia flabellifera Ziegelmeier, 1955 (source of synonymy)
Travisiidae Hartmann-Schröder, 1971 (original description)
Wilsoniella Pettibone, 1993 accepted as Pettibonesia Nemésio, 2006 (additional source)

Belte for Aphrodita aculeata Linnaeus, 1758  (doubtful)
Kattegat for Aphrodita aculeata Linnaeus, 1758  (doubtful)
North Sea for Aphrodita aculeata Linnaeus, 1758  (doubtful)
Öresund for Aphrodita aculeata Linnaeus, 1758  (doubtful)
Skagerrak for Aphrodita aculeata Linnaeus, 1758 

 Classification

 for Opheliidae Malmgren, 1867

See Travisiidae for Travisia species, and comments on their transfer out of a former position in Opheliidae to ... [details]

 Diagnosis

 for Macellicephalinae Hartmann-Schröder, 1971

Original diagnosis: "Eine unpaare Antenne oder auch diese fehlend; keine latteralen Antennen. Vordere ... [details]

 Homonymy

 for Wilsoniella Pettibone, 1993

Wilsoniella Pettibone, 1993 is preoccupied by Wilsoniella Khalfin, 1939, a genus within the Rhynchonellida ... [details]

 Publication date

 for Sosane gracilis (Malmgren, 1866)

(Malmgren, 1865) [details]

 Spelling

 for Gyptis brevipalapa [auct. lapsus]

careless checklist misspelling of no significance [details]

 Spelling

 for Proclea grafii [auctt.]

P. graffii [details]

 Synonymy

 for Lumbriconereis impatiens Claparède, 1868

Syn. To Lumbrineris tetraura (Schmarda, 1861) by Hartmann-Schröder but needed confirmation - possibly ... [details]

 Validity

 for Ophelina norvegica Støp-Bowitz, 1945

Valid as Orbinia (Phylo) norvegica (M. Sars, 1872) [details]