Aberranta palpata Wolf, 1987 (additional source)
Acmira catherinae (Laubier, 1967) represented as Aricidea (Acmira) catherinae Laubier, 1967 (additional source)
Acmira cerrutii (Laubier, 1966) represented as Aricidea (Acmira) cerrutii Laubier, 1966 (basis of record)
Acmira finitima (Strelzov, 1973) represented as Aricidea (Acmira) finitima Strelzov, 1973 (basis of record)
Acmira lopezi (Berkeley & Berkeley, 1956) represented as Aricidea (Acmira) lopezi Berkeley & Berkeley, 1956 (basis of record)
Acmira philbinae (Brown, 1976) represented as Aricidea philbinae Brown, 1976 represented as Aricidea (Acmira) philbinae Brown, 1976 (basis of record)
Acmira simplex (Day, 1963) represented as Aricidea (Acmira) simplex Day, 1963 (additional source)
Acmira taylori (Pettibone, 1965) represented as Aricidea (Acmira) taylori Pettibone, 1965 (basis of record)
Acoetes pacifica (Treadwell, 1914) (additional source)
Acoetes pleei Audouin & Milne Edwards, 1832 (additional source)
Acrocirrus frontifilis (Grube, 1860) (additional source)
Admetella longipedata (McIntosh, 1885) (additional source)
Aglaophamus circinata (Verrill in Smith & Harger, 1874) (additional source)
Aglaophamus verrilli (McIntosh, 1885) (additional source)
Allia alisdairi (Hasan, 1960) (basis of record)
Allia bryani (Gaston & McClelland, 1995) (basis of record)
Allia quadrilobata (Webster & Benedict, 1887) (basis of record)
Allia suecia (Eliason, 1920) accepted as Aricidea suecica Eliason, 1920 represented as Aricidea (Strelzovia) suecica Eliason, 1920 (basis of record)
Allia trilobata (Imajima, 1973) (basis of record)
Amaeana trilobata (Sars, 1863) (additional source)
Americonuphis magna (Andrews, 1891) (additional source)
Ampharete acutifrons (Grube, 1860) (additional source)
Ampharete lindstroemi Hessle, 1917 (additional source)
Ampharete parvidentata Day, 1973 (additional source)
Amphicteis gunneri (M. Sars, 1835) (additional source)
Amphicteis scaphobranchiata Moore, 1906 (additional source)
Amphinome rostrata (Pallas, 1766) (additional source)
Anamobaea orstedii Krøyer, 1856 (additional source)
Ancistrosyllis carolinensis Gardiner, 1976 (additional source)
Ancistrosyllis commensalis Gardiner, 1976 (additional source)
Ancistrosyllis groenlandica McIntosh, 1878 (additional source)
Ancistrosyllis hartmanae Pettibone, 1966 (additional source)
Ancistrosyllis jonesi Pettibone, 1966 (additional source)
Ancistrosyllis papillosa (Jones, 1961) (basis of record)
Aonidella dayi López-Jamar, 1989 (additional source)
Aonides mayaguezensis Foster, 1969 (additional source)
Aonides paucibranchiata Southern, 1914 (additional source)
Aphelochaeta monilaris (Hartman, 1960) (additional source)
Aphelochaeta phillipsi Blake, 1996 (additional source)
Aphelochaeta williamsae Blake, 1996 (additional source)
Apoprionospio dayi Foster, 1969 (additional source)
Apoprionospio pygmaea (Hartman, 1961) (additional source)
Arabella iricolor (Montagu, 1804) (additional source)
Arabella multidentata (Ehlers, 1887) accepted as Arabella iricolor (Montagu, 1804) (basis of record)
Arabella mutans (Chamberlin, 1919) (additional source)
Arenicola cristata Stimpson, 1856 (additional source)
Arichlidon gathofi Watson Russell, 2000 (additional source)
Aricidea (Acesta) mirifica Strelzov, 1973 accepted as Aricidea (Acmira) mirifica Strelzov, 1973 (additional source)
Aricidea (Aricidea) longicirrata Hartmann-Schröder, 1965 (additional source)
Aricidea (Aricidea) minima Strelzov, 1973 (additional source)
Aricidea (Aricidea) pseudoarticulata Hobson, 1972 (additional source)
Aricidea claudiae Laubier, 1967 represented as Aricidea (Strelzovia) claudiae Laubier, 1967 (additional source)
Aricidea fragilis Webster, 1879 represented as Aricidea (Aricidea) fragilis Webster, 1879 (additional source)
Aricidea nolani Webster & Benedict, 1887 (additional source)
Aricidea wassi Pettibone, 1965 represented as Aricidea (Aricidea) wassi Pettibone, 1965 (additional source)
Armandia agilis (Andrews, 1891) (additional source)
Armandia maculata (Webster, 1884) (additional source)
Asclerocheilus beringianus Uschakov, 1955 (additional source)
Asclerocheilus mexicanus Kudenov, 1985 (additional source)
Asychis carolinae Day, 1973 accepted as Sabaco carolinae (Day, 1973) (additional source)
Augeneria bidens (Ehlers, 1887) accepted as Lumbrineris bidens Ehlers, 1887 (basis of record)
Autolytus dentalius Imajima, 1966 accepted as Myrianida dentalia (Imajima, 1966) (additional source)
Axiothella mucosa (Andrews, 1891) accepted as Clymenella mucosa (Andrews, 1891) (additional source)
Barantolla lepte Hutchings, 1974 (additional source)
Bhawania goodei Webster, 1884 (additional source)
Bhawania heteroseta Perkins, 1985 (basis of record)
Bispira brunnea (Treadwell, 1917) (additional source)
Bispira melanostigma (Schmarda, 1861) (additional source)
Bispira nigromaculata (Baird, 1865) accepted as Branchiomma nigromaculatum (Baird, 1865) (basis of record)
Boccardia hamata (Webster, 1879) accepted as Boccardiella hamata (Webster, 1879) (additional source)
Boguea enigmatica Hartman, 1945 (additional source)
Brada villosa (Rathke, 1843) accepted as Bradabyssa villosa (Rathke, 1843) (additional source)
Branchiomma arenosa (Treadwell, 1924) accepted as Branchiomma conspersum (Ehlers, 1887) (additional source)
Branchiomma bairdi (McIntosh, 1885) (additional source)
Branchiomma conspersum (Ehlers, 1887) (additional source)
Branchiosyllis diazi Rioja, 1958 (additional source)
Branchiosyllis exilis (Gravier, 1900) (additional source)
Branchiosyllis oculata Ehlers, 1887 (additional source)
Branchipolynoe seepensis Pettibone, 1986 (additional source)
Brania clavata (Claparède, 1863) accepted as Salvatoria clavata (Claparède, 1863) (additional source)
Brania gallagheri Perkins, 1981 (additional source)
Brania swedmarki Gidholm, 1962 accepted as Salvatoria swedmarki (Gidholm, 1962) (additional source)
Brania wellfleetensis Pettibone, 1956 (additional source)
Cabira incerta Webster, 1879 (additional source)
Califia calida Hartman, 1957 (additional source)
Capitella capitata (Fabricius, 1780) (additional source)
Carazziella hobsonae Blake, 1979 (additional source)
Caulleriella alata (Southern, 1914) (additional source)
Caulleriella killariensis (Southern, 1914) accepted as Tharyx killariensis (Southern, 1914) (additional source)
Caulleriella zetlandica (McIntosh, 1911) accepted as Chaetozone zetlandica McIntosh, 1911 (additional source)
Cenogenus brevipes (McIntosh, 1903) (additional source)
Ceratocephale oculata Banse, 1977 (additional source)
Ceratonereis irritabilis (Webster, 1879) accepted as Parasetia irritabilis (Webster, 1879) (additional source)
Ceratonereis longicirrata Perkins, 1980 (additional source)
Ceratonereis mirabilis Kinberg, 1865 (additional source)
Ceratonereis singularis Treadwell, 1929 (additional source)
Ceratonereis versipedata (Ehlers, 1887) accepted as Composetia versipedata (Ehlers, 1887) (additional source)
Chaetopterus variopedatus (Renier, 1804) (additional source)
Chaetozone columbiana Blake, 1996 (additional source)
Chaetozone commonalis Blake, 1996 (additional source)

 New combination

 for Nicon aestuariensis Knox, 1951

The species appears under the new combination Nereis aestuarensis [sic] in Fauchald et al. (2009: 771). However, no ... [details]

 Spelling

 for Dorvillea jumarsii (Blake, 1985)

Clearly a proof-reading lapsus. Misspelled, and a non-existent combination as an entry in a checklist. No ... [details]