Abietinaria Kirchenpauer, 1884 (additional source)
Abludomelita Karaman, 1981 (additional source)
Abludomelita gladiosa (Spence Bate & Westwood, 1862) (additional source)
Abludomelita obtusata (Montagu, 1813) (additional source)
Acanthochitona communis (Risso, 1826) accepted as Acanthochitona fascicularis (Linnaeus, 1767) (basis of record)
Acanthochitona gracilis (Jeffreys, 1859) accepted as Acanthochitona crinita (Pennant, 1777) (source of synonymy)
Acanthocythereis dunelmensis (Norman, 1865) accepted as Actinocythereis dunelmensis (Norman, 1865) (additional source)
Acanthodasys Remane, 1927 (additional source)
Acanthodasys aculeatus Remane, 1927 (additional source)
Acanthodasys arcassonensis Kisielewski, 1987 (additional source)
Acteon tornatilis (Linnaeus, 1758) (additional source)
Actinauge Verrill, 1883 (additional source)
Actinauge richardi (Marion, 1906) (additional source)
Aega Leach, 1816 (additional source)
Aegires punctilucens (A. d'Orbigny, 1837) (additional source)
Aglantha digitale (O. F. Müller, 1776) (additional source)
Alcyonidiidae Johnston, 1837 (additional source)
Alcyonidium mytili Dalyell, 1848 accepted as Alcyonidioides mytili (Dalyell, 1848) (additional source)
Alvania beani [sic] accepted as Alvania beanii (Hanley, 1844) (additional source)
Anaitides citrina (Malmgren, 1865) accepted as Phyllodoce citrina Malmgren, 1865 (basis of record)
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)
Anthomedusae represented as Anthoathecata (basis of record)
Anthuridae Leach, 1814 (additional source)
Antipathes Pallas, 1766 (additional source)
Antipathes subpinnata Ellis & Solander, 1786 accepted as Antipathella subpinnata (Ellis & Solander, 1786) (additional source)
Antipathidae Ehrenberg, 1834 (additional source)
Aphanodomus terebellae (Levinsen, 1878) (additional source)
Aphelochaeta multibranchiis [auct. lapsus] accepted as Aphelochaeta multibranchis (Grube, 1863) (basis of record)
Apletodon microcephala (Brook, 1890) accepted as Apletodon dentatus (Facciolà, 1887) (basis of record)
Aplidium Savigny, 1816 (additional source)
Aplidium densum (Giard, 1872) (additional source)
Aplysia Linnaeus, 1767 (additional source)
Aponuphis Kucheruk, 1978 (additional source)
Aponuphis bilineata (Baird, 1870) (additional source)
Apseudes grossimanus Norman & Stebbing, 1886 (additional source)
Arachnidiidae Hincks, 1880 (additional source)
Arachnidium Hincks, 1859 (additional source)
Arachnidium fibrosum Hincks, 1880 (additional source)
Arca lactea Linnaeus, 1758 accepted as Striarca lactea (Linnaeus, 1758) (basis of record)
Archidistoma Garstang, 1891 (additional source)
Archidistoma aggregatum Garstang, 1891 (additional source)
Arcturella dilatata (G. O. Sars, 1883) accepted as Astacilla dilatata G. O. Sars, 1883 (additional source)
Arcturidae Dana, 1849 (additional source)
Aricidea (Aricidea) albatrossae Pettibone, 1957 (additional source)
Ascidia conchilega Müller, 1776 (additional source)
Ascidia mentula Müller, 1776 (additional source)
Ascidiella scabra (Müller, 1776) (additional source)
Aslia Rowe, 1970 (additional source)
Aspidelectra Levinsen, 1909 (additional source)
Aspidelectra melolontha (Landsborough, 1852) (additional source)
Aspidiophorus Voigt, 1903 (additional source)
Aspidiophorus bisquamosus Mock, 1979 (additional source)
Aspidiophorus marinus Remane, 1926 (additional source)
Aspidiophorus mediterraneus Remane, 1927 (additional source)
Aspidiophorus ornatus Mock, 1979 (additional source)
Aspidiophorus paramediterraneus Hummon, 1974 (basis of record)
Aspidoconcha limnoriae de Vos, 1953 (additional source)
Asplanchna Gosse, 1850 (additional source)
Astacilla intermedia (Goodsir, 1841) (additional source)
Astarte triangularis (Montagu, 1803) accepted as Goodallia triangularis (Montagu, 1803) (basis of record)
Atollidae Hickson, 1906 (additional source)
Atylus guttatus (A. Costa in Hope, 1851) accepted as Nototropis guttatus (A. Costa in Hope, 1851) (additional source)
Aurelia Lamarck, 1816 (additional source)
Aurelia aurita (Linnaeus, 1758) (additional source)
Autonoe Bruzelius, 1859 (additional source)
Autonoe denticarpus (Myers & McGrath, 1978) (additional source)
Autonoe longipes (Liljeborg, 1852) (additional source)
Balanus Costa, 1778 (additional source)
Balcis monterosatoi (Monterosato, 1890) accepted as Melanella monterosatoi (Monterosato, 1890) (basis of record)
Beania Johnston, 1840 (additional source)
Beania mirabilis Johnston, 1840 (additional source)
Beaniidae Canu & Bassler, 1927 (additional source)
Bela laevigata (R. A. Philippi, 1836) accepted as Bela zonata (Locard, 1891) (additional source)
Bellaspira septangularis (Montagu, 1803) accepted as Haedropleura septangularis (Montagu, 1803) (source of synonymy)
Berthellina citrina (Rüppell & Leuckart, 1828) (additional source)
Biemna Gray, 1867 (additional source)
Biemna variantia (Bowerbank, 1858) (additional source)
Biserramenia psammobionta Salvini-Plawen, 1967 (additional source)
Boccardiella Blake & Kudenov, 1978 (additional source)
Boccardiella ligerica (Ferronnière, 1898) (additional source)
Bopyrus fougerouxi Giard & Bonnier, 1890 accepted as Bopyrus squillarum Latreille, 1804 accepted as Bopyrus crangorum (Fabricius, 1798) (source of synonymy)
Bopyrus squillarum Latreille, 1804 accepted as Bopyrus crangorum (Fabricius, 1798) (additional source)
Botrylloides leachi (Savigny, 1816) accepted as Botrylloides leachii (Savigny, 1816) (additional source)
Botryllophilus norvegicus Schellenberg, 1921 (additional source)
Brachycalanus Farran, 1905 (additional source)
Brachycalanus atlanticus (Wolfenden, 1904) (additional source)
Bursovaginoidea (basis of record)
Byblis Boeck, 1871 (additional source)
Byblis erythrops G.O. Sars, 1883 (additional source)
Byblis gaimardi (Krøyer, 1846) accepted as Byblis gaimardii (Krøyer, 1846) (additional source)
Bythocythere robinsoni Athersuch, Horne & Whittaker, 1983 (additional source)
Callianassa laticauda Otto, 1821 accepted as Gilvossius tyrrhenus (Petagna, 1792) (basis of record)
Callianassa laticauda Otto, 1821 accepted as Gilvossius tyrrhenus (Petagna, 1792) (source of synonymy)
Callistocythere badia (Norman, 1862) (additional source)
Callochiton achatinus (T. Brown, 1823) accepted as Callochiton septemvalvis (Montagu, 1803) (additional source)
Calycella Hincks, 1864 in Allman, 1864 (additional source)
Calycella gracilis Hartlaub, 1897 (additional source)
Calycella hispida (Nutting, 1896) (basis of record)

Belgian Exclusive Economic Zone for Chaetonotus (Schizochaetonotus) neptuni Wilke, 1954 
Belgian Exclusive Economic Zone for Heterolepidoderma arenosum Kisielewski, 1988 
Belgian Exclusive Economic Zone for Heterolepidoderma clipeatum Schrom, 1972 
British Isles for Acanthodasys aculeatus Remane, 1927 
British Isles for Aspidiophorus marinus Remane, 1926 
British Isles for Aspidiophorus mediterraneus Remane, 1927 
British Isles for Aspidiophorus paramediterraneus Hummon, 1974 
British Isles for Cephalodasys cambriensis (Boaden, 1963) 
British Isles for Cephalodasys maximus Remane, 1926 
British Isles for Cephalodasys turbanelloides (Boaden, 1960) 
British Isles for Chaetonotus (Hystricochaetonotus) lacunosus Mock, 1979 
British Isles for Chaetonotus (Schizochaetonotus) atrox Wilke, 1954 
British Isles for Chaetonotus (Schizochaetonotus) dispar Wilke, 1954 
British Isles for Chaetonotus maximus Ehrenberg, 1831 
British Isles for Chaetonotus parthenopeius Wilke, 1954 
British Isles for Chaetonotus variosquamatus Mock, 1979 
British Isles for Dactylopodola baltica (Remane, 1926) 
British Isles for Dactylopodola cornuta (Swedmark, 1956) 
British Isles for Dactylopodola typhle (Remane, 1927) 
British Isles for Dinodasys mirabilis Remane, 1927 
British Isles for Diplodasys ankeli Wilke, 1954 
British Isles for Diplodasys minor Remane, 1936 sensu Todaro, 1992 
British Isles for Dolichodasys elongatus Gagne, 1977 
British Isles for Draculiciteria tesselata (Renaud Mornant, 1968) 
British Isles for Gnathostomula paradoxa Ax, 1956 
British Isles for Halichaetonotus aculifer (Gerlach, 1953) 
British Isles for Halichaetonotus atlanticus Kisielewski, 1988 
British Isles for Halichaetonotus batillifer (Luporini & Tongiorgi, 1972) 
British Isles for Halichaetonotus dubius (Remane, 1926) 
British Isles for Halichaetonotus jucundus (d'Hondt, 1971) 
British Isles for Halichaetonotus paradoxus (Remane, 1927) 
British Isles for Halichaetonotus pleuracanthus (Remane, 1926) 
British Isles for Heterolepidoderma marinum Remane, 1926 
British Isles for Heteroxenotrichula affinis (Remane, 1934) 
British Isles for Heteroxenotrichula pygmaea (Remane, 1934) 
British Isles for Heteroxenotrichula squamosa Wilke, 1954 
British Isles for Heteroxenotrichula subterranea (Remane, 1934) 
British Isles for Lepidodasys martini Remane, 1926 
British Isles for Lepidodasys platyurus Remane, 1927 
British Isles for Macrodasys affinis Remane, 1936 
British Isles for Macrodasys buddenbrocki Remane, 1924 
British Isles for Macrodasys caudatus Remane, 1927 
British Isles for Macrodasys cephalatus Remane, 1927 
British Isles for Macrodasys remanei Boaden, 1963 
British Isles for Megadasys sterreri (Boaden, 1974) 
British Isles for Mesodasys laticaudatus Remane, 1951 
British Isles for Mesodasys litoralis Remane, 1951 
British Isles for Neodasys chaetonotoideus Remane, 1927 
British Isles for Neodasys uchidai Remane, 1961 
British Isles for Paradasys hexadactylus Karling, 1954 
British Isles for Paradasys subterraneus Remane, 1934 
British Isles for Paraturbanella cuanensis Maguire, 1976 
British Isles for Paraturbanella dohrni Remane, 1927 
British Isles for Paraturbanella teissieri Swedmark, 1954 
British Isles for Platydasys maximus Remane, 1927 
British Isles for Platydasys rarus Forneris, 1961 
British Isles for Pleurodasys helgolandicus Remane, 1927 sensu Boaden, 1963 
British Isles for Pseudostomella roscovita Swedmark, 1956 
British Isles for Tetranchyroderma apus Remane, 1927 
British Isles for Tetranchyroderma coelopodium Boaden, 1963 
British Isles for Tetranchyroderma megastoma (Remane, 1927) 
British Isles for Tetranchyroderma polyacanthus (Remane, 1927) 
British Isles for Tetranchyroderma tribolosum Clausen, 1965 
British Isles for Thaumastoderma heideri Remane, 1926 
British Isles for Thaumastoderma ramuliferum Clausen, 1965 
British Isles for Turbanella ambronensis Remane, 1943 
British Isles for Turbanella bocqueti Kaplan, 1958 sensu Boaden, 1974 
British Isles for Turbanella cornuta Remane, 1925 
British Isles for Turbanella hyalina Schultze, 1853 
British Isles for Turbanella lutheri Remane, 1952 
British Isles for Turbanella otti Schrom in Riedl, 1970 
British Isles for Turbanella subterrenea Remane, 1934 
British Isles for Urodasys mirabilis Remane, 1926 
British Isles for Xenotrichula intermedia Remane, 1934 
British Isles for Xenotrichula micracantha (Remane, 1926) 
British Isles for Xenotrichula punctata Wilke, 1954 
British Isles for Xenotrichula velox Remane, 1927 
Danish Exclusive Economic Zone for Chaetonotus somniculosus Mock, 1979 
Danish Exclusive Economic Zone for Gnathostomaria lutheri Ax, 1956 
Danish Exclusive Economic Zone for Gnathostomula microstyla Riedl, 1971  (inaccurate)
Danish Exclusive Economic Zone for Gnathostomula paradoxa Ax, 1956 
Danish Exclusive Economic Zone for Haplognathia filum (Sterrer, 1966)  (doubtful)
Danish Exclusive Economic Zone for Haplognathia rosea (Sterrer, 1969) 
Danish Exclusive Economic Zone for Haplognathia ruberrima (Sterrer, 1966) 
Danish Exclusive Economic Zone for Haplognathia simplex (Sterrer, 1966) 
Danish Exclusive Economic Zone for Heterolepidoderma grandiculum Mock, 1979 
Danish Exclusive Economic Zone for Labidognathia longicollis Riedl, 1970  (inaccurate)
Danish Exclusive Economic Zone for Mesognatharia remanei Sterrer, 1966 
Danish Exclusive Economic Zone for Pterognathia swedmarki Sterrer, 1966 
Danish Exclusive Economic Zone for Ptychostomella ommatophora Remane, 1927 
Danish Exclusive Economic Zone for Ptychostomella pectinata Remane, 1926 
Danish Exclusive Economic Zone for Rastrognathia macrostoma Kristensen & Nørrevang, 1977 
Danish Exclusive Economic Zone for Valvognathia pogonostoma Kristensen & Nørrevang, 1978 
Dutch Exclusive Economic Zone for Chaetonotus (Chaetonotus) linguaeformis Voigt, 1902 
Dutch Exclusive Economic Zone for Heterolepidoderma armatum Schrom, 1966 
England for Chaetonotus (Chaetonotus) larus (Müller, 1773) 
England for Heteroxenotrichula arcassonensis Ruppert, 1979 
England for Paraturbanella pallida Luporini, Magagnini & Tongiorgi, 1973 
English Channel for Campylaspis macrophthalma Sars, 1878 
English Channel for Chaetonotus (Schizochaetonotus) inaequidentatus Kisielewski, 1988 

 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 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]