Abyssoninoe Orensanz, 1990 (additional source)
Actinia Linnaeus, 1767 (additional source)
Aglaophenia Lamouroux, 1812 (additional source)
Aora Krøyer, 1845 (additional source)
Aora typica Krøyer, 1845 (additional source)
Arachnida (basis of record)
Brachyscelidae Stephensen, 1923 (additional source)
Brettia Dyster, 1858 (basis of record)
Cellaria Ellis & Solander, 1786 (additional source)
Chalinidae Gray, 1867 (additional source)
Daptonema oxycerca (de Man, 1888) Lorenzen, 1977 (additional source)
Diaixidae Sars G.O., 1902 (additional source)
Diaixis Sars G.O., 1902 (additional source)
Diaixis hibernica (Scott A., 1896) (additional source)
Fimbriosthenelais Pettibone, 1971 (additional source)
Fimbriosthenelais zetlandica (McIntosh, 1876) (additional source)
Foveacheles halophila (Laboulbène, 1851) (basis of record)
Garveia nutans Wright, 1859 (additional source)
Glycera celtica O'Connor, 1987 (additional source)
Gyptis capensis (Day, 1963) accepted as Podarkeopsis capensis (Day, 1963) (basis of record)
Halecium Oken, 1815 (additional source)
Haliclona indistincta (Bowerbank, 1866) represented as Haliclona (Rhizoniera) indistincta (Bowerbank, 1866) (additional source)
Harmothoe fraserthomsoni McIntosh, 1897 (additional source)
Harmothoe marphysae McIntosh, 1876 accepted as Malmgrenia marphysae (McIntosh, 1876) (source of synonymy)
Hemiselmis vinosa (Conrad) Chrétiennot-Dinet, 1990 (basis of record)
Hydrallmania Hincks, 1868 (additional source)
Hydrichthys cyclothonis Damas, 1934 (additional source)
Ilyarachna hirticeps G. O. Sars, 1870 (additional source)
Kirchenpaueria pinnata (Linnaeus, 1758) (additional source)
Limulidae Leach, 1819 (basis of record)
Limulus O.F. Müller, 1785 (basis of record)
Limulus polyphemus (Linnaeus, 1758) (basis of record)
Merostomata (basis of record)
Nannastacus longirostris G.O. Sars, 1879 (basis of record)
Nemertesia antennina (Linnaeus, 1758) (additional source)
Nemertesia ramosa (Lamarck, 1816) (additional source)
Nymphon brevitarse Krøyer, 1844 (additional source)
Nymphon elegans Hansen, 1887 (additional source)
Nymphon gracilipes Miers, 1875 (basis of record)
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 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 bidentata Clark, 1875 (additional source)
Oceanapia isodictyiformis (Carter, 1882) (additional source)
Opercularella lacerata (Johnston, 1847) (additional source)
Pandea Lesson, 1843 (additional source)
Parundella Jörgensen, 1924 emended Kofoid & Campbell, 1926 (basis of record)
Parundella pellucida (Jörgensen, 1900) (basis of record)
Peltogaster socialis Müller, 1863 accepted as Peltogasterella socialis (Müller, 1863) (source of synonymy)
Phascolosoma minutum Keferstein, 1862 accepted as Nephasoma (Nephasoma) minutum (Keferstein, 1862) (source of synonymy)
Pherusina Norman, 1888 accepted as Aclis Lovén, 1846 (basis of record)
Plagioselmis Butcher ex G.Novarino, I.A.N.Lucas & S.Morrall, 1994 (additional source)
Plumularia Lamarck, 1816 (additional source)
Podarke pallida (Claparède, 1864) accepted as Oxydromus pallidus Claparède, 1864 (source of synonymy)
Podocoryna M. Sars, 1846 (additional source)
Podocoryna areolata (Alder, 1862) (additional source)
Polydora guillei Laubier & Ramos, 1974 accepted as Atherospio guillei (Laubier & Ramos, 1974) (additional source)
Polymnia Malmgren, 1867 accepted as Eupolymnia Verrill, 1900 (source of synonymy)
Prionospio malmgreni Claparède, 1868 (additional source)
Protochrysis Pascher, 1911 (basis of record)
Pseudobrania San Martín, 1984 accepted as Salvatoria McIntosh, 1885 (additional source)
Sarsonia leptosoma (de Man, 1893) Gerlach, 1967 (additional source)
Schistidium Brid., 1819 (basis of record)
Schistidium maritimum (Turn.) Br. Eur., 1845 (basis of record)
Schizotricha frutescens (Ellis & Solander, 1786) (additional source)
Selaginopsis Allman, 1876 accepted as Thuiaria Fleming, 1828 (additional source)
Sertularella Gray, 1848 (additional source)
Sertularella gayi (Lamouroux, 1821) (additional source)
Sertularia argentea Linnaeus, 1758 (additional source)
Sigalion squamosus Delle Chiaje, 1830 (additional source)
Sthenelais zetlandica McIntosh, 1876 accepted as Fimbriosthenelais zetlandica (McIntosh, 1876) (source of synonymy)
Syllis amica Quatrefages, 1866 (additional source)
Symplectoscyphus Marktanner-Turneretscher, 1890 (additional source)
Synelmis klatti (Friedrich, 1950) accepted as Glyphohesione klatti Friedrich, 1950 (source of synonymy)
Synonchus edentatus (von Linstow, 1900) Filipjev, 1927 (basis of record)
Tamarisca Kudelin, 1914 (additional source)
Tharyx vivipara Christie, 1984 accepted as Chaetozone vivipara (Christie, 1984) (source of synonymy)
Thracia gracilis Jeffreys, 1865 (additional source)
Thuiaria Fleming, 1828 (additional source)
Thuiaria thuja (Linnaeus, 1758) (additional source)
Tortella (basis of record)
Tortella flavovirens (Bruch) Broth. in Engl. & Prantl. (basis of record)
Trichostomum Bruch, 1829 (basis of record)
Trichostomum brachydontium Bruch, 1829 (basis of record)
Trichostomum brachydontium var. littorale (Mitt.) C. Jens. (basis of record)
Tridentata Stechow, 1920 (basis of record)
Ulota Mohr in Brid., 1819 (basis of record)
Ulota phyllantha Brid., 1819 (basis of record)
Xanthocalanus Giesbrecht, 1893 (additional source)

English squirrel's tail for Sertularia argentea Linnaeus, 1758