Abyssoninoe Orensanz, 1990 (additional source)
Actinia Linnaeus, 1767 (additional source)
Aglaophenia Lamouroux, 1812 (additional source)
Aglaophenia pluma (Linnaeus, 1758) (additional source)
Amphilepis Ljungman, 1867 (additional source)
Amphilepis norvegica (Ljungman, 1865) (additional source)
Amphipholis Ljungman, 1866 (additional source)
Amphipholis januarii Ljungman, 1866 (basis of record)
Amphipholis squamata (Delle Chiaje, 1828) (additional source)
Amphiura (Ophiopeltis) securigera (Düben & Koren, 1846) (additional source)
Amphiura chiajei Forbes, 1843 (additional source)
Amphiura filiformis (O.F. Müller, 1776) (additional source)
Amphiura griegi Mortensen, 1920 (additional source)
Amphiura sundevalli (Müller & Troschel, 1842) (additional source)
Anseropoda Nardo, 1834 (additional source)
Anseropoda placenta (Pennant, 1777) (additional source)
Antedon de Fréminville, 1811 (additional source)
Antedon bifida (Pennant, 1777) (additional source)
Antedon petasus (Düben & Koren, 1846) (additional source)
Antedonidae Norman, 1865 (additional source)
Aora Krøyer, 1845 (additional source)
Aora typica Krøyer, 1845 (additional source)
Arachnida (basis of record)
Asterias panopla Stuxberg, 1879 accepted as Icasterias panopla (Stuxberg, 1879) (additional source)
Asterina Nardo, 1834 (additional source)
Asterina gibbosa (Pennant, 1777) (additional source)
Asterina phylactica Emson & Crump, 1979 (additional source)
Asteronyx Müller & Troschel, 1842 (additional source)
Asteronyx loveni Müller & Troschel, 1842 (additional source)
Asteropseidae Hotchkiss & Clark, 1976 (basis of record)
Astropecten Gray, 1840 (additional source)
Astropecten irregularis (Pennant, 1777) (additional source)
Astropecten irregularis irregularis (Pennant, 1777) (additional source)
Astropecten tenuispinus Düben & Koren, 1846 accepted as Archaster tenuispinus (Düben & Koren, 1846) accepted as Pontaster tenuispinus (Düben & Koren, 1846) (additional source)
Bathybiaster Danielssen & Koren, 1883 (additional source)
Bathyplotes Östergren, 1896 (additional source)
Bathyplotes natans (M. Sars, 1868) (additional source)
Bathyplotes tizardi (Théel, 1882) accepted as Bathyplotes natans (M. Sars, 1868) (additional source)
Benthopectinidae Verrill, 1899 (additional source)
Benthothuria funebris Perrier R., 1898 (additional source)
Brettia Dyster, 1858 (basis of record)
Brissopsis L. Agassiz, 1840 (additional source)
Brissopsis lyrifera (Forbes, 1841) (additional source)
Brissus Gray, 1825 (additional source)
Cellaria Ellis & Solander, 1786 (additional source)
Ceramaster Verrill, 1899 (additional source)
Ceramaster granularis (Retzius, 1783) (additional source)
Chalinidae Gray, 1867 (additional source)
Cheiraster Studer, 1883 (additional source)
Crossaster Müller & Troschel, 1840 (additional source)
Crossaster papposus (Linnaeus, 1767) (additional source)
Ctenodiscus Müller & Troschel, 1842 (additional source)
Ctenodiscus crispatus (Bruzelius, 1805) (additional source)
Daptonema oxycerca (de Man, 1888) (additional source)
Dendrochirotida (additional source)
Diaixidae Sars G.O., 1902 (additional source)
Diaixis Sars G.O., 1902 (additional source)
Diaixis hibernica (Scott A., 1896) (additional source)
Duasmodactyla Ayres, 1852 accepted as Thyonidium Düben & Koren, 1846 (additional source)
Dynamena Lamouroux, 1812 (additional source)
Echinaster Müller & Troschel, 1840 (additional source)
Echinocardium Gray, 1825 (additional source)
Echinocardium cordatum (Pennant, 1777) (additional source)
Echinocardium flavescens (O.F. Müller, 1776) (additional source)
Echinocardium pennatifidum Norman, 1868 (additional source)
Echinocucumis M. Sars, 1859 (additional source)
Echinocucumis hispida (Barrett, 1857) (additional source)
Echinocyamus van Phelsum, 1774 (additional source)
Echinocyamus pusillus (O.F. Müller, 1776) (additional source)
Echinosoma Semper, 1867 accepted as Eupyrgus Lütken, 1857 (additional source)
Echinosoma hispidum Semper, 1867 accepted as Eupyrgus scaber Lütken, 1857 (additional source)
Echinus Linnaeus, 1758 (additional source)
Echinus acutus Lamarck, 1816 accepted as Gracilechinus acutus (Lamarck, 1816) (additional source)
Echinus elegans Düben & Koren, 1844 accepted as Gracilechinus elegans (Düben & Koren, 1844) (additional source)
Echinus esculentus Linnaeus, 1758 (additional source)
Echinus miliaris P.L.S. Müller, 1771 accepted as Psammechinus miliaris (P.L.S. Müller, 1771) (additional source)
Echinus tenuispinus Norman, 1868 (additional source)
Eostichopus Cutress & Miller, 1982 (additional source)
Eostichopus arnesoni Cutress & Miller, 1982 (basis of record)
Euthyonidiella Heding & Panning, 1954 (additional source)
Fimbriosthenelais Pettibone, 1971 (additional source)
Fimbriosthenelais zetlandica (McIntosh, 1876) (additional source)
Ganeriidae Sladen, 1889 accepted as Ganeriinae Sladen, 1889 (basis of record)
Garveia nutans Wright, 1859 (additional source)
Gephyrothuriidae Koehler & Vaney, 1905 (basis of record)
Glycera celtica O'Connor, 1987 (additional source)
Gorgonocephalus Leach, 1815 (additional source)
Gorgonocephalus arcticus Leach, 1819 (additional source)
Gorgonocephalus caputmedusae (Linnaeus, 1758) (additional source)
Gorgonocephalus eucnemis (Müller & Troschel, 1842) (additional source)
Gyptis capensis (Day, 1963) accepted as Podarkeopsis capensis (Day, 1963) (basis of record)
Halecium Oken, 1815 (additional source)
Harmothoe fraserthomsoni McIntosh, 1897 (additional source)
Harmothoe marphysae McIntosh, 1876 accepted as Malmgrenia marphysae (McIntosh, 1876) (source of synonymy)
Havelockia Pearson, 1903 (additional source)
Havelockia inermis (Heller, 1868) accepted as Thyone inermis Heller, 1868 (additional source)
Heliometra AH Clark, 1907 (additional source)
Heliometra glacialis (Owen, 1833 ex Leach MS) (additional source)
Henricia oculata (Pennant, 1777) (additional source)
Henricia perforata (O.F. Müller, 1776) (additional source)

English squirrel's tail for Sertularia argentea Linnaeus, 1758