Abra longicallus (Scacchi, 1835) (additional source)
Acanthicolepis asperrima (M. Sars, 1861) (additional source)
Adyte pellucida (Ehlers, 1864) accepted as Subadyte pellucida (Ehlers, 1864) (basis of record)
Alentia gelatinosa (M. Sars, 1835) (additional source)
Altenaeum Spaink, 1972 (basis of record)
Altenaeum dawsoni (Jeffreys, 1864) (basis of record)
Alvania abyssicola (Forbes, 1850) accepted as Alvania testae (Aradas & Maggiore, 1844) (basis of record)
Alvania cimicoides (Forbes, 1844) (additional source)
Ampharete goesi Malmgren, 1866 (additional source)
Ampharete lindstroemi Hessle, 1917 (additional source)
Antinoe finmarchia [auctt. misspelling for finmarchica] accepted as Antinoe finmarchica Malmgren, 1867 (basis of record)
Antinoe finmarchica Malmgren, 1867 (additional source)
Arcopagia balaustina (Linnaeus, 1758) accepted as Arcopella balaustina (Linnaeus, 1758) (additional source)
Aricidea albatrossae Pettibone, 1957 represented as Aricidea (Aricidea) albatrossae Pettibone, 1957 (additional source)
Asclerocheilus intermedius (Saint-Joseph, 1894) (additional source)
Asperspina brambelli (Swedmark, 1968) (additional source)
Astarte borealis (Schumacher, 1817) accepted as Tridonta borealis Schumacher, 1817 (additional source)
Astarte elliptica (T. Brown, 1827) accepted as Tridonta elliptica (T. Brown, 1827) (additional source)
Astarte montagui (Dillwyn, 1817) accepted as Tridonta montagui (Dillwyn, 1817) (additional source)
Austrolaenilla mollis (Sars, 1872) (additional source)
Autolytus alexandri Malmgren, 1867 accepted as Epigamia alexandri (Malmgren, 1867) (additional source)
Autolytus brachycephalus (Marenzeller, 1874) accepted as Myrianida brachycephala (Marenzeller, 1874) (additional source)
Autolytus inermis Saint-Joseph, 1887 accepted as Myrianida inermis (Saint Joseph, 1887) (additional source)
Autolytus langerhansi Gidholm, 1967 accepted as Myrianida langerhansi (Gidholm, 1967) (basis of record)
Autolytus quinquedecimdentatus [auct. misspelling] accepted as Myrianida quindecimdentata (Langerhans, 1884) (additional source)
Autolytus rubrolineatus Gildhom, 1967 accepted as Myrianida irregularis (Imajima & Hartman, 1964) (additional source)
Bankia fimbriatula Moll & Roch, 1931 (additional source)
Bela brachystoma (R. A. Philippi, 1844) accepted as Sorgenfreispira brachystoma (R. A. Philippi, 1844) (additional source)
Berthella plumula (Montagu, 1803) (additional source)
Bispira crassicornis (Sars, 1851) (additional source)
Brachioteuthis riisei (Steenstrup, 1882) (additional source)
Brada inhabilis (Rathke, 1843) (additional source)
Branchiomma inconspicua (M. Sars in G.O. Sars, 1872) (additional source)
Brania limbata (Claparède, 1868) accepted as Salvatoria limbata (Claparède, 1868) (additional source)
Bylgides elegans (Théel, 1879) (additional source)
Bylgides groenlandicus (Malmgren, 1867) (additional source)
Bylgides sarsi (Kinberg in Malmgren, 1866) (additional source)
Cadulus subfusiformis (M. Sars, 1865) (additional source)
Caecum trachea (Montagu, 1803) (additional source)
Calliopaea bellula A. d'Orbigny, 1837 (additional source)
Capitella giardi (Mesnil, 1897) (additional source)
Capitella minima Langerhans, 1880 (additional source)
Cardiomya costellata (Deshayes, 1835) (additional source)
Caulleriella bioculata parva Gillandt, 1979 accepted as Caulleriella parva Gillandt, 1979 (additional source)
Caulleriella serrata Eliason, 1962 accepted as Kirkegaardia serrata (Eliason, 1962) (additional source)
Cerastoderma lamarcki (Reeve, 1845) accepted as Cerastoderma glaucum (Bruguière, 1789) (basis of record)
Chamelea striatula (da Costa, 1778) (additional source)
Chirimia Light, 1991 (additional source)
Chirimia biceps (M. Sars, 1861) (additional source)
Chlamys sulcata (O. F. Müller, 1776) accepted as Pseudamussium sulcatum (O. F. Müller, 1776) accepted as Karnekampia sulcata (O. F. Müller, 1776) (additional source)
Chone longocirrata M. Sars in G.O. Sars, 1872 accepted as Chone duneri Malmgren, 1867 (additional source)
Chrysallida indistincta (Montagu, 1808) accepted as Parthenina indistincta (Montagu, 1808) (additional source)
Chrysallida nivosa (Montagu, 1803) accepted as Jordaniella nivosa (Montagu, 1803) (additional source)
Chrysallida pellucida (Dillwyn, 1817) accepted as Spiralinella spiralis (Montagu, 1803) accepted as Spiralina spiralis (Montagu, 1803) (additional source)
Clymenella cincta (Saint-Joseph, 1894) (additional source)
Clymenella torquata (Leidy, 1855) (additional source)
Clymenura lankesteri (McIntosh, 1885) (additional source)
Commensodorum commensalis (Lützen, 1961) (additional source)
Corambe obscura (A. E. Verrill, 1870) (additional source)
Coryphella browni Picton, 1980 (additional source)
Coryphella gracilis (Alder & Hancock, 1844) (additional source)
Coryphella pedata (Montagu, 1816) accepted as Edmundsella pedata (Montagu, 1816) (basis of record)
Coryphella verrucosa (M. Sars, 1829) (additional source)
Crassadoma pusio (Linnaeus, 1758) accepted as Talochlamys pusio (Linnaeus, 1758) (additional source)
Crassostrea virginica (Gmelin, 1791) (additional source)
Ctenodrilus serratus (Schmidt, 1857) (additional source)
Cuspidaria costellata (Deshayes, 1835) accepted as Cardiomya costellata (Deshayes, 1835) (source of synonymy)
Cuthona pustulata (Alder & Hancock, 1854) accepted as Zelentia pustulata (Alder & Hancock, 1854) (additional source)
Cylichnina umbilicata (Montagu, 1803) accepted as Retusa umbilicata (Montagu, 1803) (additional source)
Dasybranchus caducus (Grube, 1846) (additional source)
Dinophilus gyrociliatus O. Schmidt, 1857 accepted as Dimorphilus gyrociliatus (O. Schmidt, 1857) (additional source)
Dinophilus taeniatus Harmer, 1889 (additional source)
Discocelides Bergendal, 1893 (additional source)
Discocelides langi Bergendal, 1893 (additional source)
Diurodrilus subterraneus Remane, 1934 (additional source)
Drilonereis brattstroemi Fauchald, 1972 (additional source)
Dunkeria jeffreysii (Jeffreys, 1848) accepted as Pyrgiscus jeffreysii (Jeffreys, 1848) (basis of record)
Dysponetus caecus (Langerhans, 1880) (additional source)
Dysponetus paleophorus Hartmann-Schröder, 1974 (basis of record)
Enipo elisabethae McIntosh, 1900 (additional source)
Ensis americanus (A. Gould, 1870) accepted as Ensis leei M. Huber, 2015 (basis of record)
Erycina (Hemilepton) nitidum (W. Turton, 1822) accepted as Hemilepton nitidum (W. Turton, 1822) (additional source)
Eubranchus doriae (Trinchese, 1874) accepted as Capellinia doriae Trinchese, 1874 (additional source)
Eubranchus vittatus (Alder & Hancock, 1842) (additional source)
Euclymene lindrothi Eliason, 1962 (additional source)
Eucranta villosa Malmgren, 1865 (additional source)
Eulalia clavigera (Audouin & Milne Edwards, 1833) (additional source)
Eulalia hanssoni Pleijel, 1987 (additional source)
Eulalia tjalfiensis Ditlevsen, 1917 (additional source)
Eulalia tripunctata McIntosh, 1874 (additional source)
Eulima glabra (da Costa, 1778) (additional source)
Eulimella scillae (Scacchi, 1835) (additional source)
Eulimella ventricosa (Forbes, 1844) (additional source)
Eumida arctica (Annenkova, 1946) (additional source)
Eumida ockelmanni Eibye-Jacobsen, 1987 (additional source)
Eunice dubitata Fauchald, 1974 (additional source)
Eunice norvegica (Linnaeus, 1767) (additional source)
Euphrosine armadillo M. Sars, 1851 (additional source)
Euphrosine borealis Örsted, 1843 (additional source)
Eurylepta Ehrenberg, 1831 (additional source)