Abyssoninoe Orensanz, 1990 (additional source)
Aglaophenia Lamouroux, 1812 (additional source)
Amphipholis Ljungman, 1866 (additional source)
Amphipholis squamata (Delle Chiaje, 1828) (additional source)
Amphipholis torelli Ljungman, 1872 (additional source)
Amphiura (Ophiopeltis) securigera (Düben & Koren, 1846) (additional source)
Amphiura borealis (G.O. Sars, 1872) (additional source)
Amphiura sundevalli (Müller & Troschel, 1842) (additional source)
Antedonidae Norman, 1865 (additional source)
Arachnida (basis of record)
Bathybiaster Danielssen & Koren, 1883 (additional source)
Bathybiaster vexillifer (Wyville Thomson, 1873) (additional source)
Bathycrinidae Bather, 1899 (additional source)
Bathycrinus Thomson, 1872 (additional source)
Bathycrinus carpenterii (Danielssen & Koren, 1877) (additional source)
Benthopectinidae Verrill, 1899 (additional source)
Ceramaster Verrill, 1899 (additional source)
Ceramaster granularis (Retzius, 1783) (additional source)
Chalinidae Gray, 1867 (additional source)
Crossaster Müller & Troschel, 1840 (additional source)
Crossaster papposus (Linnaeus, 1767) (additional source)
Crossaster squamatus (Döderlein, 1900) (additional source)
Ctenodiscus Müller & Troschel, 1842 (additional source)
Ctenodiscus crispatus (Bruzelius, 1805) (additional source)
Dynamena Lamouroux, 1812 (additional source)
Echinocyamus van Phelsum, 1774 (additional source)
Echinocyamus pusillus (O.F. Müller, 1776) (additional source)
Echinus Linnaeus, 1758 (additional source)
Echinus acutus Lamarck, 1816 accepted as Gracilechinus acutus (Lamarck, 1816) (additional source)
Echinus esculentus Linnaeus, 1758 (additional source)
Eudendrium ramosum Van Beneden, 1844 accepted as Bougainvillia muscus (Allman, 1863) (basis of record)
Gellius angulatus (Bowerbank, 1866) accepted as Haliclona (Gellius) angulata (Bowerbank, 1866) (source of synonymy)
Gorgonocephalus Leach, 1815 (additional source)
Gorgonocephalus arcticus Leach, 1819 (additional source)
Gorgonocephalus eucnemis (Müller & Troschel, 1842) (additional source)
Gorgonocephalus lamarckii (Müller & Troschel, 1842) (additional source)
Halecium Oken, 1815 (additional source)
Hathrometra AH Clark, 1908 (additional source)
Hathrometra sarsii (Düben & Koren, 1846) accepted as Hathrometra tenella (Retzius, 1783) (additional source)
Heliometra AH Clark, 1907 (additional source)
Heliometra glacialis (Owen, 1833 ex Leach MS) (additional source)
Henricia eschrichti (Müller & Troschel, 1842) (additional source)
Henricia lisa A.H. Clark, 1949 (additional source)
Henricia lisa ingolfi Madsen, 1987 (additional source)
Henricia perforata (O.F. Müller, 1776) (additional source)
Henricia pertusa (O.F. Müller, 1776) (additional source)
Henricia sanguinolenta (O.F. Müller, 1776) (additional source)
Hippasteria Gray, 1840 (additional source)
Hippasteria phrygiana (Parelius, 1768) (additional source)
Hydrallmania Hincks, 1868 (additional source)
Hypodontolaimus buetschlii Filipjev, 1918 accepted as Hypodontolaimus balticus (G. Schneider, 1906) Filipjev, 1918 (source of synonymy)
Icasterias Fisher, 1923 (additional source)
Icasterias panopla (Stuxberg, 1879) (additional source)
Ilyarachna hirticeps G. O. Sars, 1870 (additional source)
Leptychaster E. A. Smith, 1876 (additional source)
Leptychaster arcticus (M. Sars, 1851) (additional source)
Lophaster Verrill, 1878 (additional source)
Lophaster furcifer (Düben & Koren, 1846) (additional source)
Nemertesia antennina (Linnaeus, 1758) (additional source)
Nymphon elegans Hansen, 1887 (additional source)
Nymphon grossipes (Fabricius, 1780) (additional source)
Nymphon hirtipes Bell, 1855 (additional source)
Nymphon leptocheles Sars, 1888 (additional source)
Nymphon longimanum Sars, 1888 (additional source)
Nymphon longitarse Krøyer, 1844 (additional source)
Nymphon macronyx Sars, 1877 (additional source)
Nymphon macrum Wilson, 1880 (basis of record)
Nymphon megalops Sars, 1877 (additional source)
Nymphon microrhynchum G.O. Sars, 1888 (additional source)
Nymphon mixtum Krøyer, 1844 accepted as Nymphon grossipes (Fabricius, 1780) (basis of record)
Nymphon serratum G. O. Sars, 1879 (additional source)
Nymphon sluiteri Hoek, 1901 (additional source)
Nymphon stroemi Krøyer, 1844 (additional source)
Nymphon tenellum (Sars, 1888) (additional source)
Nymphonidae Wilson, 1878 (basis of record)
Obelia flabellata (Hincks, 1866) accepted as Obelia longissima (Pallas, 1766) (basis of record)
Obelia flabellata (Hincks, 1866) accepted as Obelia longissima (Pallas, 1766) (source of synonymy)
Opercularella lacerata (Johnston, 1847) (additional source)
Ophiacantha Müller & Troschel, 1842 (additional source)
Ophiacantha abyssicola G.O. Sars, 1872 (additional source)
Ophiacantha bidentata (Bruzelius, 1805) (additional source)
Ophiacantha spectabilis G.O. Sars, 1872 accepted as Ophiotreta spectabilis (G.O. Sars, 1872) (additional source)
Ophiactis Lütken, 1856 (additional source)
Ophiactis abyssicola (M. Sars, 1861) (additional source)
Ophiocten Lütken, 1855 (additional source)
Ophiocten affinis (Lütken, 1858) (additional source)
Ophiocten sericeum (Forbes, 1852) (additional source)
Ophiopholis Müller & Troschel, 1842 (additional source)
Ophiopholis aculeata (Linnaeus, 1767) (additional source)
Ophiopleura Danielssen & Koren, 1877 (additional source)
Ophiopleura borealis Danielssen & Koren, 1877 (additional source)
Ophiopus Ljungman, 1867 (additional source)
Ophiopus arcticus Ljungman, 1867 (additional source)
Ophioscolex Müller & Troschel, 1842 (additional source)
Ophioscolex (Ophiolycus) purpureus Düben & Koren, 1846 accepted as Ophiolycus purpureus (Düben & Koren, 1846) (additional source)
Ophioscolex glacialis Müller & Troschel, 1842 (additional source)
Ophiothrix fragilis (Abildgaard in O.F. Müller, 1789) (additional source)
Ophiura Lamarck, 1801 (additional source)
Ophiura albida Forbes, 1839 (additional source)
Ophiura robusta (Ayres, 1852) (additional source)

English squirrel's tail for Sertularia argentea Linnaeus, 1758