Abietinaria abietina (Linnaeus, 1758) (additional source)
Aetea anguina (Linnaeus, 1758) (additional source)
Aglaophamus malmgreni (Théel, 1879) (additional source)
Alcyonidium diaphanum (Hudson, 1778) (additional source)
Amage auricula Malmgren, 1866 (additional source)
Ampelisca macrocephala Liljeborg, 1853 (additional source)
Ampharete acutifrons (Grube, 1860) (additional source)
Ampharete baltica Eliason, 1955 (additional source)
Ampharete finmarchica (M. Sars, 1865) (additional source)
Ampharete lindstroemi Hessle, 1917 (additional source)
Amphiblestrum flemingii (Busk, 1854) (additional source)
Amphicteis gunneri (M. Sars, 1835) (additional source)
Amphilochus manudens Spence Bate & Westwood, 1862 (additional source)
Amphitrite Müller, 1771 (additional source)
Amphitrite cirrata Müller, 1776 (additional source)
Anaitides groenlandica (Örsted, 1842) accepted as Phyllodoce groenlandica Örsted, 1842 (additional source)
Anaitides maculata (Linnaeus, 1767) accepted as Phyllodoce maculata (Linnaeus, 1767) (additional source)
Anaitides mucosa (Örsted, 1843) accepted as Phyllodoce mucosa Örsted, 1843 (additional source)
Anobothrus gracilis (Malmgren, 1866) (additional source)
Anonyx lilljeborgi Boeck, 1871 (additional source)
Apherusa bispinosa (Spence Bate, 1857) (additional source)
Arabella iricolor (Montagu, 1804) (additional source)
Arenicola marina (Linnaeus, 1758) (additional source)
Argissa hamatipes (Norman, 1869) (additional source)
Aricidea Webster, 1879 (additional source)
Aricidea (Aricidea) albatrossae Pettibone, 1957 (additional source)
Aricidea suecica Eliason, 1920 represented as Aricidea (Strelzovia) suecica Eliason, 1920 (additional source)
Arrhis phyllonyx (M. Sars, 1858) (additional source)
Ascidia Linnaeus, 1767 (additional source)
Ascidia obliqua Alder, 1863 (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)
Atlantopandalus propinqvus (G.O. Sars, 1870) (basis of record)
Autolytus Grube, 1850 accepted as Myrianida Milne Edwards, 1845 (additional source)
Balanus balanus (Linnaeus, 1758) (additional source)
Balanus crenatus Bruguière, 1789 (additional source)
Balanus improvisus Darwin, 1854 accepted as Amphibalanus improvisus (Darwin, 1854) (additional source)
Bathymedon longimanus (Boeck, 1871) (additional source)
Bicellariella ciliata (Linnaeus, 1758) (additional source)
Bolocera tuediae (Johnston, 1832) (additional source)
Bougainvillia Lesson, 1830 (additional source)
Brachydiastylis resima (Krøyer, 1846) (additional source)
Brada inhabilis (Rathke, 1843) (additional source)
Brada villosa (Rathke, 1843) accepted as Bradabyssa villosa (Rathke, 1843) (additional source)
Brania clavata (Claparède, 1863) accepted as Salvatoria clavata (Claparède, 1863) (additional source)
Bugula flabellata (Thompson in Gray, 1848) accepted as Bugulina flabellata (Thompson in Gray, 1848) (additional source)
Bugula plumosa (Pallas, 1766) accepted as Crisularia plumosa (Pallas, 1766) (additional source)
Byblis gaimardi (Krøyer, 1846) accepted as Byblis gaimardii (Krøyer, 1846) (additional source)
Calliopius laeviusculus (Krøyer, 1838) (additional source)
Callopora aurita (Hincks) accepted as Amphiblestrum auritum (Hincks, 1877) (additional source)
Callopora dumerilii (Audouin, 1826) (additional source)
Callopora lineata (Linnaeus, 1767) (additional source)
Calycella syringa (Linnaeus, 1767) (additional source)
Campanularia hincksii Alder, 1856 (additional source)
Campylaspis rubicunda (Liljeborg, 1855) (additional source)
Capitella Blainville, 1828 (additional source)
Capitella capitata (Fabricius, 1780) (additional source)
Cellepora pumicosa (Pallas, 1766) (additional source)
Ceratocephale loveni Malmgren, 1867 (additional source)
Cerebratulus [Renier], [1804] (additional source)
Cerianthus Delle Chiaje, 1841 (additional source)
Chaetopterus Cuvier, 1830 (additional source)
Chaetozone setosa Malmgren, 1867 (additional source)
Chirona hameri (Ascanius, 1767) (additional source)
Chone Krøyer, 1856 (additional source)
Chone duneri Malmgren, 1867 (additional source)
Chone infundibuliformis Krøyer, 1856 (additional source)
Circeis spirillum (Linnaeus, 1758) (additional source)
Cirratulus Lamarck, 1818 (additional source)
Cirratulus cirratus (O. F. Müller, 1776) (additional source)
Cirratulus filiformis Keferstein, 1862 accepted as Aphelochaeta filiformis (Keferstein, 1862) (additional source)
Cirrophorus branchiatus Ehlers, 1908 (additional source)
Cirrophorus furcatus (Hartman, 1957) (additional source)
Clathrina coriacea (Montagu, 1814) (additional source)
Cliona celata Grant, 1826 (additional source)
Clymenella Verrill, 1873 (additional source)
Clymenella torquata (Leidy, 1855) (additional source)
Clymenura Verrill, 1900 (additional source)
Clymenura borealis (Arwidsson, 1906) (additional source)
Clytia Lamouroux, 1812 (additional source)
Clytia hemisphaerica (Linnaeus, 1767) (additional source)
Conopeum reticulum (Linnaeus, 1767) (additional source)
Corophium crassicorne Bruzelius, 1859 accepted as Crassicorophium crassicorne (Bruzelius, 1859) (additional source)
Corophium insidiosum Crawford, 1937 accepted as Monocorophium insidiosum (Crawford, 1937) (additional source)
Corophium volutator (Pallas, 1766) (additional source)
Coryne pusilla Gaertner, 1774 (additional source)
Cossura longocirrata Webster & Benedict, 1887 (additional source)
Cribrilina annulata (O. Fabricius, 1780) accepted as Juxtacribrilina annulata (Fabricius, 1780) (additional source)
Cribrilina punctata (Hassall, 1841) (additional source)
Crisia denticulata (Lamarck, 1816) (additional source)
Crossaster papposus (Linnaeus, 1767) (additional source)
Cucumaria frondosa (Gunnerus, 1767) (additional source)
Cuspidaria obesa (Lovén, 1846) (additional source)
Dendrodoa grossularia (Van Beneden, 1846) (additional source)
Diastylis lucifera (Krøyer, 1837) (additional source)
Diphasia Agassiz, 1862 (additional source)
Diplocirrus Haase, 1915 (additional source)
Diplosolen obelia (Johnston, 1838) accepted as Diplosolen obelium (Johnston, 1838) (additional source)
Dipolydora caulleryi (Mesnil, 1897) (additional source)
Discoconchoecia elegans (Sars, 1866) (additional source)