WoRMS source details
Acanthamoeba polyphaga (Puschkarew) (basis of record)
Acanthodoris pilosa (Abildgaard, 1789) (additional source)
Acanthophyma (basis of record)
Acanthophyma gowerensis (Lockett) (basis of record)
Acaridae (basis of record)
Acarina accepted as Acari (basis of record)
Acasta Leach, 1817 (additional source)
Acasta spongites (Poli, 1791) (additional source)
Acheliidae accepted as Ammotheidae Dohrn, 1881 (basis of record)
Acineta tuberosa Ehrenberg, 1833 (basis of record)
Actacarus Schulz, 1937 (additional source)
Actidium Matthews, 1868 (basis of record)
Actidium coarctatum (Haliday) (basis of record)
Actinia equina (Linnaeus, 1758) (additional source)
Actinia fragacea Tugwell, 1856 (additional source)
Actiniaria (basis of record)
Actiniidae Rafinesque, 1815 (additional source)
Actinostolidae Carlgren, 1932 (additional source)
Actinothoe Fischer, 1889 (additional source)
Actinothoe sphyrodeta (Gosse, 1858) (additional source)
Adalaria proxima (Alder & Hancock, 1854) (additional source)
Adamsia Forbes, 1840 accepted as Calliactis Verrill, 1869 (additional source)
Adocia cinerea (Grant, 1826) accepted as Haliclona (Reniera) cinerea (Grant, 1826) (additional source)
Adoristes Hull, 1916 (basis of record)
Aegialia Latreille, 1807 (basis of record)
Aeginina longicornis (Krøyer, 1843) (additional source)
Aeolidiella alderi (Cocks, 1852) (additional source)
Aeolidiella glauca (Alder & Hancock, 1845) (additional source)
Aepophilus Signoret, 1879 (additional source)
Aepophilus bonnairei Signoret, 1879 (additional source)
Aepopsis Jeannel, 1922 (additional source)
Aepopsis robinii (Laboulbene, 1849) (additional source)
Aepus Leach in Samouelle, 1819 (additional source)
Aepus marinus (Stroem, 1788) (additional source)
Aetea anguina (Linnaeus, 1758) (additional source)
Aetea sica (Couch, 1844) (additional source)
Aetea truncata (Landsborough, 1852) (additional source)
Agabus Leach, 1817 (basis of record)
Agabus conspersus (Marsham) (basis of record)
Agauopsis Viets, 1927 (additional source)
Aglaophenia acacia Allman, 1883 (additional source)
Aglaophenia kirchenpaueri (Heller, 1868) (additional source)
Aglaophenia tubulifera (Hincks, 1861) (additional source)
Agramma Stephens, 1829 (basis of record)
Agramma laeta (Faller) (basis of record)
Agriotes Eschscholtz in Thon, 1829 (basis of record)
Aiptasia Gosse, 1858 (additional source)
Aiptasia mutabilis (Gravenhorst, 1831) (additional source)
Aiptasiidae Carlgren, 1924 (additional source)
Alcippidae accepted as Trypetesidae Stebbing, 1910 (basis of record)
Alcyonacea accepted as Octocorallia (basis of record)
Alcyonidium Lamouroux, 1813 (additional source)
Alcyonidium gelatinosum (Linnaeus, 1761) (additional source)
Alcyonidium hirsutum (Fleming, 1828) (additional source)
Alcyonidium parasiticum (Fleming, 1828) (additional source)
Alcyoniidae Lamouroux, 1812 (additional source)
Alcyonium digitatum Linnaeus, 1758 (additional source)
Alcyonium glomeratum (Hassall, 1843) (additional source)
Alderia modesta (Lovén, 1844) (additional source)
Aleochara Gravenhorst, 1802 (basis of record)
Allomelita pellucida (G.O. Sars, 1883) (additional source)
Alloteuthis media (Linnaeus, 1758) (additional source)
Alloteuthis subulata (Lamarck, 1798) (additional source)
Alpheus Fabricius, 1798 (additional source)
Amalosoma Fisher, 1948 (additional source)
Amalosoma eddystonense Stephen, 1956 (additional source)
Amathia Lamouroux, 1812 (additional source)
Amathia lendigera (Linnaeus, 1758) (additional source)
Amblyosyllis formosa (Claparède, 1863) accepted as Amblyosyllis spectabilis (Johnston in Baird, 1861) (additional source)
Amblyseius Berlese (basis of record)
Ameronothroidea Willmann, 1931 (basis of record)
Ameronothrus Berlese, 1896 (basis of record)
Ammobaculites balkwilli Haynes, 1973 (basis of record)
Ammotheidae Dohrn, 1881 (basis of record)
Amoebidae Ehrenberg, 1838 (basis of record)
Amphiblestrum Gray, 1848 (additional source)
Amphiblestrum flemingii (Busk, 1854) (additional source)
Amphichaeta Tauber, 1879 (additional source)
Amphichaeta sannio Kallstenius, 1892 (additional source)
Amphiglena mediterranea (Leydig, 1851) (additional source)
Amphilectus Vosmaer, 1880 (additional source)
Amphilectus fucorum (Esper, 1794) (additional source)
Amphiporidae Örsted, 1843 (additional source)
Amphiporus Ehrenberg, 1831 (additional source)
Amphiporus allucens Bürger, 1895 (additional source)
Amphiporus bioculatus sensu Verrill, 1892 (additional source)
Amphiporus dissimulans Riches, 1893 (additional source)
Amphiporus elongatus Stephenson, 1911 accepted as Psammamphiporus elongatus (Stephenson, 1911) (basis of record)
Amphiporus hastatus McIntosh, 1874 (additional source)
Amphiporus lactifloreus (Johnston, 1828) (additional source)
Amphitholina cuniculus (Stebbing, 1874) (additional source)
Amphitrite figulus (Dalyell, 1853) represented as Neoamphitrite figulus (Dalyell, 1853) (additional source)
Amphitritides gracilis (Grube, 1860) (additional source)
Ampithoe gammaroides (Spence Bate, 1857) accepted as Pleonexes gammaroides Spence Bate, 1857 (additional source)
Ampithoe helleri Karaman, 1975 accepted as Pleonexes helleri (Karaman, 1975) (additional source)
Anapagurus chiroacanthus (Liljeborg, 1856) (additional source)
Anasca accepted as Flustrina (basis of record)
Anchialina agilis (G.O. Sars, 1877) (additional source)
Anchinoe Gray, 1867 accepted as Phorbas Duchassaing & Michelotti, 1864 (additional source)
Anglesey for Amphilochus neapolitanus Della Valle, 1893
Anglesey for Anurida maritima (Guérin-Méneville, 1836)
Anglesey for Anuridella marina Willem, 1906
Anglesey for Dyopedos porrectus Spence Bate, 1857
Anglesey for Leptocheirus pilosus Zaddach, 1844
Anglesey for Monodonta lineata (da Costa, 1778)
Anglesey for Ommatoiulus sabulosus (Linnaeus, 1758)
Anglesey for Synchelidium maculatum Stebbing, 1906
Bristol Channel for Adalaria proxima (Alder & Hancock, 1854)
Bristol Channel for Bathynectes longipes (Risso, 1816)
Bristol Channel for Bathyporeia nana Toulmond, 1966
Bristol Channel for Crenella decussata (Montagu, 1808)
Bristol Channel for Crepidula fornicata (Linnaeus, 1758) (origin: alien)
Bristol Channel for Doto cuspidata Alder & Hancock, 1862
Bristol Channel for Doto eireana Lemche, 1976
Bristol Channel for Dulichia falcata (Spence Bate, 1857)
Bristol Channel for Dyopedos monacantha (Metzger, 1875)
Bristol Channel for Dyopedos porrectus Spence Bate, 1857
Bristol Channel for Glossus humanus (Linnaeus, 1758)
Bristol Channel for Paradoxostoma ensiforme Brady, 1868
Bristol Channel for Parvipalpus capillaceus (Chevreux, 1888)
Bristol Channel for Philine catena (Montagu, 1803)
Bristol Channel for Tenellia adspersa (von Nordmann, 1845)
Bristol Channel for Thecacera pennigera (Montagu, 1813)
Bristol Channel for Urothoe poseidonis Reibish, 1905
British Isles for Abludomelita obtusata (Montagu, 1813)
British Isles for Abra alba (W. Wood, 1802)
British Isles for Abra nitida (O. F. Müller, 1776)
British Isles for Abra prismatica (Montagu, 1808)
British Isles for Acanthocardia (Rudicardium) tuberculata (Linnaeus, 1758)
British Isles for Acanthocardia echinata (Linnaeus, 1758)
British Isles for Acanthochitona crinitus (Pennant, 1777)
British Isles for Acanthodoris pilosa (Abildgaard, 1789)
British Isles for Acanthophyma gowerensis (Lockett)
British Isles for Achelia echinata Hodge, 1864
British Isles for Acteon tornatilis (Linnaeus, 1758)
British Isles for Actidium coarctatum (Haliday)
British Isles for Adalaria proxima (Alder & Hancock, 1854)
British Isles for Adamsia carciniopados (Otto, 1823)
British Isles for Adoristes Hull, 1916
British Isles for Aedes (Ochlerotatus) caspius (Pallas, 1771)
British Isles for Aedes (Ochlerotatus) detritus (Haliday, 1833)
British Isles for Aedes (Ochlerotatus) dorsalis (Meigen, 1830)
British Isles for Aegialia arenaria (Fabricius, 1787)
British Isles for Aegires punctilucens (A. d'Orbigny, 1837)
British Isles for Aeolidia papillosa (Linnaeus, 1761)
British Isles for Aeolidiella alderi (Cocks, 1852)
British Isles for Aeolidiella glauca (Alder & Hancock, 1845)
British Isles for Aepophilus bonnairei Signoret, 1879
British Isles for Aepopsis robinii (Laboulbene, 1849)
British Isles for Aepus marinus (Stroem, 1788)
British Isles for Aequipecten opercularis (Linnaeus, 1758)
British Isles for Aetea anguina (Linnaeus, 1758)
British Isles for Aetea sica (Couch, 1844)
British Isles for Aetea truncata (Landsborough, 1852)
British Isles for Agabus conspersus (Marsham)
British Isles for Agauopsis Viets, 1927
British Isles for Agonus cataphractus (Linnaeus, 1758)
British Isles for Agramma laeta (Faller)
British Isles for Akera bullata O. F. Müller, 1776
British Isles for Alcyonidium diaphanum (Hudson, 1778)
British Isles for Alcyonidium gelatinosum (Linnaeus, 1761)
British Isles for Alcyonidium hirsutum (Fleming, 1828)
British Isles for Alcyonidium mytili Dalyell, 1848
British Isles for Alcyonidium parasiticum (Fleming, 1828)
British Isles for Alderia modesta (Lovén, 1844)
British Isles for Alentia gelatinosa (M. Sars, 1835)
British Isles for Aleochara (Emplenota) algarum Fauvel, 1862
British Isles for Alloteuthis media (Linnaeus, 1758)
British Isles for Alloteuthis subulata (Lamarck, 1798)
British Isles for Alosa fallax (Lacepède, 1803)
British Isles for Alvania semistriata (Montagu, 1808)
British Isles for Amathia lendigera (Linnaeus, 1758)
British Isles for Amblyosyllis formosa (Claparède, 1863)
British Isles for Amblyseius Berlese
British Isles for Ameronothrus Berlese, 1896
British Isles for Ammodytes marinus Raitt, 1934
British Isles for Ammodytes tobianus Linnaeus, 1758
British Isles for Amphiblestrum flemingii (Busk, 1854)
British Isles for Amphipholis squamata (Delle Chiaje, 1828)
British Isles for Amphiporus bioculatus sensu Verrill, 1892
British Isles for Amphiporus dissimulans Riches, 1893
British Isles for Amphiporus hastatus McIntosh, 1874
British Isles for Amphiporus lactifloreus (Johnston, 1828)
British Isles for Amphitrite figulus (Dalyell, 1853)
British Isles for Amphiura chiajei Forbes, 1843
British Isles for Amphiura filiformis (O.F. Müller, 1776)
British Isles for Ampithoe gammaroides (Spence Bate, 1857)
British Isles for Ampithoe rubricata (Montagu, 1808)
British Isles for Anaitides groenlandica (Örsted, 1842)
British Isles for Anaitides maculata (Linnaeus, 1767)
British Isles for Anapagurus chiroacanthus (Liljeborg, 1856)
British Isles for Anapagurus hyndmanni (Bell, 1845)
British Isles for Anapagurus laevis (Bell, 1845)
British Isles for Anchialina agilis (G.O. Sars, 1877)
British Isles for Ancula gibbosa (Risso, 1818)
British Isles for Anguilla anguilla (Linnaeus, 1758)
British Isles for Anguinella palmata Van Beneden, 1845
British Isles for Angulus squalidus (Pulteney, 1799)
Audouin & Milne Edwards, 1834 [details]
(Fabricus) in stead of the author Rathke. [details]
was given as Johnston, in most works prior to 1994. [details]
Author: (Linnaeus) according to Hayward & Ryland (1990). [details]
Nielsen C. O. and Christensen B., 1959 [details]
This authority places the genus under the family Sphenomonadidae [details]
This authority places the genus under the family Cyathomonadidae. [details]
This authority places the genus under the family Heteronematidae. [details]
This authority places the genus under the family Heteronematidae. [details]
Some authorities consider this genus as a zoological group and place it under the zoological name of the family ... [details]
This authority places the genus under the family Heteronematidae. [details]
This genus was placed by these authorities in the family Lophodiniidae but according to Algaebase this genus is ... [details]
Some authorities consider this genus as a zoological group and place it under the zoological name of the family ... [details]
This authority places the genus under the family Sphenomonadidae [details]
This authority places the genus under the family Heteronematidae. [details]
This authority places the genus under the family Sphenomonadidae [details]
Some authorities consider this genus as a zoological group and place it under the zoological name of the family ... [details]
This genus is classified in family Heteroceridae by Hayward & Ryland (1990). [details]
This authority places the genus under the family Sphenomonadidae [details]
Some authorities consider this genus as a zoological group and place it under the zoological name of the family ... [details]
This authority considered the genus as zoological and placed it under the family Prasinocladidae, but according to ... [details]
This authority places the genus under the family Heteronematidae [details]
This species has not been recorded frequently but may have a distribution similar to that of A. echinata. However, ... [details]
absent from the west coast of Jutland and the Baltic [details]
An artic species which reaches its southernmost limits around Shetland. [details]
Amongst vegetation in shallow brackish water. [details]
Absent from Baltic and eastern basin of English Channel [details]
Cosmopolitan in temperate and warm temperate seas [details]
absent from Belgium, Holland, east coast of Denmark, and Baltic Sea [details]
All coasts, but uncommon in south, not present around Channel Islands [details]
Common and generally distributed. [details]
Not common around Channel Isles and Scilly Isles [details]
Occurs in littoral subsoil and salt-marshes on the east coast of England. [details]
south-west and south-east Scotland; southwest England; coasts of Norway [details]
All British coasts, but apparently not common. [details]