Abietinaria Kirchenpauer, 1884 (additional source)
Abludomelita Karaman, 1981 (additional source)
Abludomelita obtusata (Montagu, 1813) (additional source)
Acanthocythereis dunelmensis (Norman, 1865) accepted as Actinocythereis dunelmensis (Norman, 1865) (additional source)
Actinauge Verrill, 1883 (additional source)
Aega Leach, 1816 (additional source)
Aglantha digitale (O. F. Müller, 1776) (additional source)
Alcyonidiidae Johnston, 1837 (additional source)
Anaitides groenlandica (Örsted, 1842) accepted as Phyllodoce groenlandica Örsted, 1842 (basis of record)
Anguinella palmata Van Beneden, 1845 (additional source)
Angulus tenuis (da Costa, 1778) accepted as Macomangulus tenuis (da Costa, 1778) (basis of record)
Anthuridae Leach, 1814 (additional source)
Aphanodomus terebellae (Levinsen, 1878) (additional source)
Aplidium Savigny, 1816 (additional source)
Aplysia Linnaeus, 1767 (additional source)
Arcturidae Dana, 1849 (additional source)
Aricidea (Aricidea) albatrossae Pettibone, 1957 (additional source)
Aspidoconcha limnoriae de Vos, 1953 (additional source)
Atollidae Hickson, 1906 (additional source)
Aurelia Lamarck, 1816 (additional source)
Aurelia aurita (Linnaeus, 1758) (additional source)
Autonoe Bruzelius, 1859 (additional source)
Balanus Costa, 1778 (additional source)
Beania Johnston, 1840 (additional source)
Beaniidae Canu & Bassler, 1927 (additional source)
Biemna Gray, 1867 (additional source)
Biemna variantia (Bowerbank, 1858) (additional source)
Botryllophilus norvegicus Schellenberg, 1921 (additional source)
Byblis Boeck, 1871 (additional source)
Byblis gaimardi (Krøyer, 1846) accepted as Byblis gaimardii (Krøyer, 1846) (additional source)
Bythocythere robinsoni Athersuch, Horne & Whittaker, 1983 (additional source)
Callistocythere badia (Norman, 1862) (additional source)
Calycella Hincks, 1864 in Allman, 1864 (additional source)
Campanulina Van Beneden, 1847 (basis of record)
Campanulina pumila (Clark, 1875) (basis of record)
Campanulinidae Hincks, 1868 (basis of record)
Campylaspis costata (Sars, 1865) (additional source)
Campylaspis rubicunda (Liljeborg, 1855) (additional source)
Candelabridae Stechow, 1921 (additional source)
Candelabrum de Blainville, 1830 (additional source)
Carinocythereis whitei (Baird, 1850) (additional source)
Centroderes Zelinka, 1907 (additional source)
Centroderidae Zelinka, 1896 (additional source)
Cerithiella metula (Lovén, 1846) (additional source)
Chirona hameri (Ascanius, 1767) (additional source)
Chromadorina Filipjev, 1918 (basis of record)
Chrysaora Péron & Lesueur, 1810 (additional source)
Clathrina Gray, 1867 (additional source)
Clathrina coriacea (Montagu, 1814) (additional source)
Cnidaria (additional source)
Corycaeus Dana, 1845 (additional source)
Corycaeus anglicus Lubbock, 1857 accepted as Corycaeus (Ditrichocorycaeus) anglicus Lubbock, 1857 accepted as Ditrichocorycaeus anglicus (Lubbock, 1857) (basis of record)
Crangonidae Haworth, 1825 (additional source)
Crenella decussata (Montagu, 1808) (additional source)
Cribrilina Gray, 1848 (additional source)
Cribrilina annulata (O. Fabricius, 1780) accepted as Juxtacribrilina annulata (Fabricius, 1780) (additional source)
Cribrilina cryptooecium Norman, 1903 accepted as Cribrilina (Cribrilina) cryptooecium Norman, 1903 (additional source)
Cribrilina punctata (Hassall, 1841) (additional source)
Cyanea Péron & Lesueur, 1810 (additional source)
Cyanea capillata (Linnaeus, 1758) (additional source)
Cyaneidae L. Agassiz, 1862 (additional source)
Cyclorhagida (additional source)
Cyclorhiza eteonicola Heegaard, 1942 (additional source)
Cylichna cylindracea (Pennant, 1777) (additional source)
Daptonema Cobb, 1920 (additional source)
Daptonema tenuispiculum (Ditlevsen, 1918) Lorenzen, 1977 (additional source)
Dendrodoa MacLeay, 1824 (additional source)
Desmacellidae Ridley & Dendy, 1886 (additional source)
Diastylis rathkei typica Zimmer (additional source)
Diastyloides serrata (Sars G.O., 1865) accepted as Diastyloides serratus (Sars G.O., 1865) (additional source)
Diastyloides serratus (Sars G.O., 1865) (additional source)
Didemnum Savigny, 1816 (additional source)
Diphyinae Quoy & Gaimard, 1827 (additional source)
Echinoderes Claparède, 1863 (additional source)
Echinoderidae Carus, 1885 (additional source)
Echiurus Guérin-Méneville, 1831 (additional source)
Ehlersia ferrugina Langerhans, 1881 accepted as Paraehlersia ferrugina (Langerhans, 1881) (additional source)
Ekmania barthii (Troschel, 1846) (additional source)
Electra Lamouroux, 1816 (additional source)
Electra crustulenta (Pallas, 1766) accepted as Einhornia crustulenta (Pallas, 1766) (additional source)
Electra monostachys (Busk, 1854) (additional source)
Electra pilosa (Linnaeus, 1767) (additional source)
Elofsonella concinna (Jones, 1857) Pokorny, 1955 (additional source)
Ericthonius rubricornis (Stimpson, 1853) (additional source)
Eucythere argus (Sars, 1866) (additional source)
Eudendriidae L. Agassiz, 1862 (basis of record)
Eulimnogammarus obtusatus (Dahl, 1938) accepted as Gammarus obtusatus Dahl, 1938 accepted as Echinogammarus obtusatus (Dahl, 1938) accepted as Marinogammarus obtusatus (Dahl, 1938) (additional source)
Eurytemora hirundoides (Nordquist, 1888) accepted as Eurytemora affinis (Poppe, 1880) accepted as Eurytemora affinis affinis (Poppe, 1880) (source of synonymy)
Eurytemora hirundoides (Nordquist, 1888) accepted as Eurytemora affinis (Poppe, 1880) accepted as Eurytemora affinis affinis (Poppe, 1880) (basis of record)
Facelina bostoniensis (Couthouy, 1838) (additional source)
Flabellina pellucida (Alder & Hancock, 1843) accepted as Carronella pellucida (Alder & Hancock, 1843) (additional source)
Flabellina verrucosa (M. Sars, 1829) accepted as Coryphella verrucosa (M. Sars, 1829) (basis of record)
Flustra Linnaeus, 1761 (additional source)
Flustrellidridae Bassler, 1953 (additional source)
Gammarus tigrinus Sexton, 1939 (additional source)
Gattyana amondseni (Malmgren, 1867) (additional source)
Geomonhystera disjuncta (Bastian, 1865) accepted as Halomonhystera disjuncta (Bastian, 1865) Andrássy, 2006 (additional source)
Golfingia minuta (Keferstein, 1862) accepted as Nephasoma (Nephasoma) minutum (Keferstein, 1862) (additional source)
Gonatus steenstrupi Kristensen, 1981 (additional source)
Halisarca dujardinii Johnston, 1842 (additional source)

Europe for Myriothelidae Hincks, 1868 
Europe for Zoantharia 
Scandinavia for Halicryptus spinulosus von Siebold, 1849 
Scandinavia for Priapulus bicaudatus Danielssen, 1869 

 Authority

 for Brachycalanus atlanticus (Wolfenden, 1904)

Farran, 1905 [details]

 Authority

 for Byblis erythrops G.O. Sars, 1883

G.O. Sars, 1882 [details]

 Authority

 for Campylaspis glabra Sars, 1878

G.O. Sars, 1879 [details]

 Authority

 for Campylaspis macrophthalma Sars, 1878

G.O. Sars, 1879 [details]

 Authority

 for Campylaspis verrucosa Sars, 1866

G.O. Sars, 1865 [details]

 Authority

 for Conilera cylindracea (Montagu, 1804)

(Montagu, 1803) [details]

 Authority

 for Conocyema polymorpha Van Beneden, 1882

Van Beneden, 1883 [details]

 Authority

 for Devonia perrieri (Malard, 1904)

(Mallard, 1904) [details]

 Authority

 for Dicyema typus Van Beneden, 1876

Van Beneden, 1882 [details]

 Authority

 for Dicyemennea eledones (Wagener, 1857)

Whitman, 1883 [details]

 Authority

 for Didemnum fulgens (Milne Edwards, 1841)

(Milne Edwards, 1841) [details]

 Authority

 for Diplodasys minor Remane, 1936 sensu Todaro, 1992

Remane, 1927 [details]

 Authority

 for Distomus variolosus Gaertner, 1774

Gaertner in Pallas, 1774 [details]

 Authority

 for Ehlersia ferrugina Langerhans, 1881

(Lagerhans, 1881) [details]

 Authority

 for Escharina hyndmanni (Johnston, 1847)

Johnston, 1847 [details]

 Authority

 for Eurypon coronula (Bowerbank, 1874)

(Bowerbank, 1866) [details]

 Authority

 for Halichaetonotus jucundus (d'Hondt, 1971)

(d'Hondt, 1971a sensu Mock, 1979) [details]

 Authority

 for Halichaetonotus tentaculatus (d'Hondt, 1971)

Mock, 1979 [details]

 Authority

 for Harmothoe longisetis (Grube, 1863)

Grube, 1863 [details]

 Authority

 for Iphinoe serrata Norman, 1867

Bate, 1856 [details]

 Authority

 for Littorina fabalis (W. Turton, 1825)

Authority from Howson (1997) [details]

 Authority

 for Parapleustes assimilis (G.O. Sars, 1883)

(G.O. Sars, 1882) [details]

 Authority

 for Paraturbanella pallida Luporini, Magagnini & Tongiorgi, 1973

Luporini et al, 1971 [details]

 Authority

 for Parvipalpus capillaceus (Chevreux, 1888)

(Chevreux, 1888) [details]

 Authority

 for Pseudione callianassae Kossmann, 1881

Kossman, 1881 [details]

 Authority

 for Rossia macrosoma (Delle Chiaje, 1830)

(delle Chiaje, 1830) [details]

 Authority

 for Saccoglossus ruber Tattersall, 1905

(Tattersall, 1905) [details]

 Authority

 for Sphaerosyllis taylori Perkins, 1981

Perkins, 1980 [details]

 Authority

 for Tapes Megerle von Mühlfeld, 1811

Authority from Howson (1997) [details]

 Authority

 for Tetranchyroderma dragescoi Swedmark, 1967

Swedmark, 1956 [details]

 Authority

 for Thaumastoderma cantacuzeni Lévi, 1958

Levi, 1958 [details]

 Authority

 for Thaumastoderma swedmarki Lévi, 1950

Levi, 1959 [details]

 Biology

 for Nematomorpha

The Nematomorpha is a small phylum of aquatic worms with about 200 species worldwide. Their free-living adults are ... [details]

 Distribution

 for Berthellina citrina (Rüppell & Leuckart, 1828)

Usage of this name in the context of European seas refer to Berthellina edwardsii (Vayssière, 1896), see Cervera ... [details]

 Publication date

 for Callochiton achatinus (T. Brown, 1823)

publication date given is 1827 [details]

 Spelling

 for Atylus swammerdamei (H. Milne Edwards, 1830)

Atylus swammerdamei. [details]

 Spelling

 for Ichthydium supralitorale Mock, 1979

Ichthydium supralitoralis [details]

 Spelling

 for Maxmuelleria lankesteri (Herdman, 1897)

Maxmulleria [details]

 Spelling

 for Mesodasys lobocercus (Boaden, 1960)

Synonymised with Mesodasys laticaudatus Remane, 1951 [details]

 Spelling

 for Nototropis swammerdami (H. Milne Edwards, 1830)

Note the different spelling of the species name (endings) Atylus swammerdamie and Nototropis swammerdami  [details]

 Spelling

 for Ophiocten sericeum (Forbes, 1852)

Ophiocten sericium [details]

 Spelling

 for Platydasys mastigurus Clausen, 1965

Platydasys mastigurus Clausen, 1965 [details]

 Spelling

 for Tetranchyroderma apus Remane, 1927

Tetranchyroderma apum Remane, 1927 [details]

 Spelling

 for Thaumastoderma renaudi Kisielewski, 1987

Thaumastoderma renaudae Kisielewski, 1987 [details]

 Synonymy

 for Bela laevigata (R. A. Philippi, 1836)

Treated as a synonym of Mangelia (Bela) powisiana (Dautzenberg) in Howson & Picton (1997). [details]

 Synonymy

 for Bela nebula (Montagu, 1803)

Synonym of Mangelia (Bela) nebula (Montagu) [details]

 Synonymy

 for Dactylopodola weilli (d'Hondt, 1965)

Treated as a synonym of D. typhle in Howson & Picton [details]

 Synonymy

 for Harmothoe longisetis (Grube, 1863)

H. longisetis is a species distinct from H. glabra, and has a more southerly distribution. The name H. longisetis ... [details]

 Synonymy

 for Harmothoe longisetis Auctt. non Grube, 1863

Name has been misapplied by ao Hartmann-Schroder (1971) and Fauvel. [details]

 Synonymy

 for Hiatella rugosa (Linnaeus, 1767)

H. rugosa (Linnaeus, 1767) and H. gallicana (Lamarck, 1818) are possibly synonymous but their status is unresolved. [details]

 Synonymy

 for Lasaea adansoni (Gmelin, 1791)

Synonym of Lasaea rubra [details]

 Synonymy

 for Littorina fabalis (W. Turton, 1825)

Treated as a synonym of Littorina mariae Sacchi & Rastelli, 1966 in Howson & Picton(1997). [details]

 Synonymy

 for Megadasys minor Kisielewski, 1987

Synonymised with Megadasys sterreri (Boaden, 1974) [details]

 Synonymy

 for Neptunea contraria (Linnaeus, 1771)

Treated as a synonym of Neptunea antiqua (Linnaeus, 1758) in howson & Picton (1997). [details]

 Synonymy

 for Raphitoma leufroyi (Michaud, 1828)

Treated as a synonym of Raphitoma (Leufroyia) boothii (Brown in J Smith, 1839) in Howson & Picton (1997). [details]

 Synonymy

 for Turbanella varians Maguire, 1976

Treated as a synonym of T. cornuta in Howson and Picton [details]

 Synonymy

 for Urodasys roscoffensis Kisielewski, 1987

U. roscovensis treated as a synonym of U. mirabilis in Hoson & Picton [details]

 Taxonomy

 for Raspaciona aculeata (Johnston, 1842)

Howson & Picton (1997) report this species as authored by Bowerbank, 1866. Moreover they maintain that the record ... [details]

 Validity

 for Jujubinus striatus (Linnaeus, 1758)

Valid as Jujubinus (Mirulinus) striatus (Linnaeus, 1758) [details]

 Validity

 for Spisula solida (Linnaeus, 1758)

Valid as Spisula (Spisula) solida (Linnaeus, 1758) [details]