Acontiaria Stephenson, 1935 (original description)
Actinauge richardi (Marion, 1906) (additional source)
Actinia equina (Linnaeus, 1758) (additional source)
Actinia intestinalis Fabricius, 1780 accepted as Acthelmis intestinalis (Fabricius, 1780) (additional source)
Actinia johnstoni Cocks accepted as Cereus pedunculatus (Pennant, 1777) (additional source)
Actinothoe (Sagartia) anguicoma (Price in Johnston, 1847) accepted as Actinothoe anguicoma (Price in Johnston, 1847) (additional source)
Actinothoe (Sagartia) lacerata (Dalyell, 1848) accepted as Sagartia lacerata (Dalyell, 1848) (additional source)
Actinothoe (Sagartia) sphyrodeta (Gosse, 1858) accepted as Actinothoe sphyrodeta (Gosse, 1858) (additional source)
Actinothoe alderi (Cocks, 1851) (additional source)
Actinothoe bellii (Cocks, 1851) (additional source)
Actinothoe hastata (Wright, 1859) accepted as Sagartia hastata Wright, 1859 accepted as Cylista hastata Wright, 1859 (additional source)
Actinothoe pellucida (Cocks, 1851) (additional source)
Actinothoe yarellii (Cocks, 1851) accepted as Actinothoe yarrellii (Cocks, 1851) (additional source)
Adamsia palliata (Fabricius, 1779) accepted as Calliactis palliata (Müller, 1776) (additional source)
Aiptasia couchii Gosse (additional source)
Amphianthus (Gephyropsis) dohrnii (Koch, 1878) accepted as Amphianthus dohrnii (Koch, 1878) (additional source)
Anemonia sulcata (Pennant, 1777) (additional source)
Anthopleura ballii (Cocks, 1851) (additional source)
Anthopleura monile (Templeton, 1836) (additional source)
Anthopleura thallia (Gosse, 1854) (additional source)
Aureliania heterocera (Thompson, 1853) accepted as Capnea sanguinea Forbes, 1841 (additional source)
Bolocera tuediae (Johnston, 1832) (additional source)
Bunodactis verrucosa (Pennant, 1777) (additional source)
Calliactis parasitica (Couch, 1842) (additional source)
Cataphellia brodricii (Gosse, 1859) (additional source)
Cereus pedunculatus (Pennant, 1777) (additional source)
Chrysoela chrysosplenium (Cocks in Johnson, 1847) (additional source)
Diadumene cincta Stephenson, 1925 (additional source)
Diadumene luciae (Verrill, 1869) accepted as Diadumene lineata (Verrill, 1869) (additional source)
Edwardsia allmani McIntosh, 1866 accepted as Edwardsia allmanni McIntosh, 1865 (additional source)
Edwardsia callimorpha (Gosse, 1853) accepted as Scolanthus callimorphus Gosse, 1853 (additional source)
Edwardsia delapiae Carlgren & Stephenson, 1928 (additional source)
Edwardsia goodsiri M'Intosh, 1866 (additional source)
Edwardsia tecta Haddon, 1889 (additional source)
Eloactis mazeli (Jourdan, 1880) accepted as Anemonactis mazeli (Jourdan, 1880) (additional source)
Gonactinia prolifera (Sars, 1835) (additional source)
Gregoria fenestrata Gosse, 1860 (additional source)
Halcampa chrysanthellum (Peach in Johnston, 1847) (additional source)
Halcampa clavus (Quoy & Gaimard, 1833) accepted as Anemonactis clavus (Quoy & Gaimard, 1833) (additional source)
Halcampella Andres, 1883 (additional source)
Halcampoides purpurea (Studer, 1879) accepted as Halcampoides purpureus (Studer, 1879) (additional source)
Hormathia bellis (Forbes) accepted as Cereus pedunculatus (Pennant, 1777) (additional source)
Hormathia coronata (Gosse, 1858) (additional source)
Hormathia digitata (O.F. Müller, 1776) (additional source)
Ilyanthus (Mesacmaea) mitchellii (Gosse, 1853) represented as Ilyanthus mitchellii (Gosse, 1853) accepted as Mesacmaea mitchellii (Gosse, 1853) (additional source)
Ilyanthus scoticus Forbes, 1840 (additional source)
Isophelliidae accepted as Andvakiidae Danielssen, 1890 (original description)
Kodioides borleyi Walton, 1910 (additional source)
Metridium senile (Linnaeus, 1761) (additional source)
Metridium senile dianthus (additional source)
Metridium senile pallidum (additional source)
Milne-Edwardsia carnea (Gosse, 1856) accepted as Edwardsiella carnea (Gosse, 1856) (additional source)
Milne-Edwardsia dixonii Carlgren, 1921 accepted as Edwardsia timida Quatrefages, 1842 (additional source)
Nematostella Stephenson, 1935 (original description)
Nematostella vectensis Stephenson, 1935 (original description)
Paraphellia expansa Haddon, 1886 (additional source)
Peachia hastata Gosse, 1855 (additional source)
Phellia gausapata Gosse, 1858 (additional source)
Sagartia alba (Cocks in Johnston, 1847) accepted as Cylista alba (Cocks in Johnston, 1847) (additional source)
Sagartia elegans (Dalyell, 1848) accepted as Cylista elegans (Dalyell, 1848) (additional source)
Sagartia elegans aurantiaca (additional source)
Sagartia elegans miniata (additional source)
Sagartia elegans nivea (additional source)
Sagartia elegans rosea (additional source)
Sagartia elegans var. venusta (Gosse) accepted as Sagartia elegans (Dalyell, 1848) accepted as Cylista elegans (Dalyell, 1848) (additional source)
Sagartia troglodytes (Price in Johnston, 1847) accepted as Cylista troglodytes (Price in Johnston, 1847) (additional source)
Sagartia troglodytes decorata (additional source)
Sagartia troglodytes var. ornata (Holdsworth) accepted as Sagartia ornata (Holdsworth, 1855) accepted as Cylista ornata (Holdsworth, 1855) (additional source)
Stomphia coccinea (Müller, 1776) (additional source)
Tealia felina (Linnaeus, 1767) accepted as Urticina felina (Linnaeus, 1761) (additional source)
Tealia felina crassicornis (O. F. Müller, 1776) accepted as Urticina crassicornis (Müller, 1776) (additional source)
Tealia felina var. coriacea (Cuvier) accepted as Urticina coriacea (Cuvier, 1798) (additional source)
Tealia felina var. lofotensis (Danielssen) accepted as Urticina lofotensis (Danielssen, 1890) accepted as Urticina eques (Gosse, 1858) (additional source)
Tealia felina var. tuberculata (Cocks, 1851) accepted as Urticina tuberculata (Cocks, 1851) (additional source)

Irish Exclusive economic Zone for Actinauge richardi (Marion, 1906) 
Irish Exclusive economic Zone for Actinothoe (Sagartia) lacerata (Dalyell, 1848) 
Irish Exclusive economic Zone for Anthopleura ballii (Cocks, 1851) 
Irish Exclusive economic Zone for Edwardsia callimorpha (Gosse, 1853) 
Irish Exclusive economic Zone for Edwardsia delapiae Carlgren & Stephenson, 1928 
Irish Exclusive economic Zone for Sagartia elegans (Dalyell, 1848) 
Isle of Man for Aureliania heterocera (Thompson, 1853) 
Italy for Diadumene lineata (Verrill, 1869)  (origin: alien)
Suez canal for Diadumene lineata (Verrill, 1869)  (origin: alien)
Swedish Exclusive Economic Zone for Hormathia digitata (O.F. Müller, 1776) 
United Kingdom for Diadumene lineata (Verrill, 1869)  (origin: alien)
United Kingdom Exclusive Economic Zone for Actinia equina (Linnaeus, 1758) 
United Kingdom Exclusive Economic Zone for Actinothoe (Sagartia) anguicoma (Price in Johnston, 1847) 
United Kingdom Exclusive Economic Zone for Actinothoe (Sagartia) sphyrodeta (Gosse, 1858) 
United Kingdom Exclusive Economic Zone for Adamsia palliata (Fabricius, 1779) 
United Kingdom Exclusive Economic Zone for Aiptasia couchii Gosse 
United Kingdom Exclusive Economic Zone for Amphianthus (Gephyropsis) dohrnii (Koch, 1878) 
United Kingdom Exclusive Economic Zone for Anemonia sulcata (Pennant, 1777) 
United Kingdom Exclusive Economic Zone for Anthopleura thallia (Gosse, 1854) 
United Kingdom Exclusive Economic Zone for Bolocera tuediae (Johnston, 1832) 
United Kingdom Exclusive Economic Zone for Bunodactis verrucosa (Pennant, 1777) 
United Kingdom Exclusive Economic Zone for Calliactis parasitica (Couch, 1842) 
United Kingdom Exclusive Economic Zone for Cataphellia brodricii (Gosse, 1859) 
United Kingdom Exclusive Economic Zone for Cereus pedunculatus (Pennant, 1777) 
United Kingdom Exclusive Economic Zone for Diadumene cincta Stephenson, 1925 
United Kingdom Exclusive Economic Zone for Diadumene luciae (Verrill, 1869) 
United Kingdom Exclusive Economic Zone for Diadumene luciae (Verrill, 1869) 
United Kingdom Exclusive Economic Zone for Diadumene luciae (Verrill, 1869) 
United Kingdom Exclusive Economic Zone for Diadumene luciae (Verrill, 1869) 
United Kingdom Exclusive Economic Zone for Diadumene luciae (Verrill, 1869) 
United Kingdom Exclusive Economic Zone for Diadumene luciae (Verrill, 1869) 
United Kingdom Exclusive Economic Zone for Diadumene luciae (Verrill, 1869) 
United Kingdom Exclusive Economic Zone for Eloactis mazeli (Jourdan, 1880) 
United Kingdom Exclusive Economic Zone for Gonactinia prolifera (Sars, 1835) 
United Kingdom Exclusive Economic Zone for Halcampa chrysanthellum (Peach in Johnston, 1847) 
United Kingdom Exclusive Economic Zone for Hormathia coronata (Gosse, 1858) 
United Kingdom Exclusive Economic Zone for Ilyanthus (Mesacmaea) mitchellii (Gosse, 1853) 
United Kingdom Exclusive Economic Zone for Metridium senile (Linnaeus, 1761) 
United Kingdom Exclusive Economic Zone for Milne-Edwardsia carnea (Gosse, 1856) 
United Kingdom Exclusive Economic Zone for Paraphellia expansa Haddon, 1886 
United Kingdom Exclusive Economic Zone for Peachia hastata Gosse, 1855 
United Kingdom Exclusive Economic Zone for Phellia gausapata Gosse, 1858 
United Kingdom Exclusive Economic Zone for Sagartia troglodytes (Price in Johnston, 1847) 
United Kingdom Exclusive Economic Zone for Stomphia coccinea (Müller, 1776) 
United Kingdom Exclusive Economic Zone for Tealia felina (Linnaeus, 1767) 

Syntype SMNH 4874, geounit United Kingdom Exclusive Economic Zone, identified as Nematostella vectensis Stephenson, 1935