Actinulida (basis of record)
Aeginidae Gegenbaur, 1857 (basis of record)
Aglantha Haeckel, 1879 (additional source)
Aglaopheniidae Marktanner-Turneretscher, 1890 (basis of record)
Amphisbetia L. Agassiz, 1862 (additional source)
Amphisbetia operculata (Linnaeus, 1758) (additional source)
Anthoathecata (basis of record)
Armorhydridae Swedmark & Teissier, 1958 (basis of record)
Blackfordiidae Bouillon, 1984 (basis of record)
Bougainvillia Lesson, 1830 (additional source)
Bougainvillia britannica (Forbes, 1841) (additional source)
Bougainvillia muscus (Allman, 1863) (additional source)
Bougainvillia principis (Steenstrup, 1850) (additional source)
Bougainvillia pyramidata (Forbes & Goodsir, 1853) (additional source)
Bougainvilliidae Lütken, 1850 (basis of record)
Campanulariidae Johnston, 1836 (basis of record)
Capitata (basis of record)
Cladonema Dujardin, 1843 (additional source)
Cladonema radiatum Dujardin, 1843 (additional source)
Clytia Lamouroux, 1812 (additional source)
Clytia gracilis (M. Sars, 1851) (additional source)
Clytia hemisphaerica (Linnaeus, 1767) (additional source)
Clytia paulensis (Vanhöffen, 1910) (additional source)
Conica accepted as Leptothecata (basis of record)
Corymorpha M. Sars, 1835 (additional source)
Corymorpha nutans M. Sars, 1835 (additional source)
Corymorphidae Allman, 1872 (basis of record)
Corynidae Johnston, 1836 (basis of record)
Cosmetira Forbes, 1848 (additional source)
Craspedacusta Lankester, 1880 (additional source)
Craspedacusta sowerbii Lankester, 1880 (additional source)
Dipleurosomatidae Boeck, 1868 (basis of record)
Dipurena McCrady, 1859 accepted as Slabberia Forbes, 1846 (additional source)
Ectopleura L. Agassiz, 1862 (additional source)
Ectopleura dumortierii (Van Beneden, 1844) (additional source)
Eirene Eschscholtz, 1829 (additional source)
Eirenidae Haeckel, 1879 (basis of record)
Eleutheriidae Russell, 1953 accepted as Cladonematidae Gegenbaur, 1857 (basis of record)
Eucheilota McCrady, 1859 (additional source)
Eutima McCrady, 1859 (additional source)
Eutima gracilis (Forbes & Goodsir, 1853) (additional source)
Filifera (basis of record)
Geryoniidae Eschscholtz, 1829 (basis of record)
Gonionemus vertens A. Agassiz, 1862 (additional source)
Gossea L. Agassiz, 1862 accepted as Octobulbacea Zamponi, 1983 (additional source)
Gossea corynetes (Gosse, 1853) accepted as Octobulbacea corynetes (Gosse, 1853) (additional source)
Gymnangium Hincks, 1874 (additional source)
Haleciidae Hincks, 1868 (basis of record)
Hybocodon L. Agassiz, 1860 (additional source)
Hydractinia Van Beneden, 1844 (additional source)
Hydractinia carnea (M. Sars, 1846) accepted as Podocoryna carnea M. Sars, 1846 (additional source)
Hydractiniidae L. Agassiz, 1862 (basis of record)
Hydranthea Hincks, 1868 (additional source)
Hydranthea margarica (Hincks, 1862) (additional source)
Hydroidolina (basis of record)
Lafoeidae Hincks, 1868 (basis of record)
Laodicea Lesson, 1843 (additional source)
Laodicea undulata (Forbes & Goodsir, 1853) (additional source)
Laodiceidae Agassiz, 1862 (basis of record)
Leptothecata (basis of record)
Leuckartiara Hartlaub, 1914 (additional source)
Leuckartiara octona (Fleming, 1823) (additional source)
Limnomedusae (basis of record)
Lovenella Hincks, 1868 (additional source)
Lovenella clausa (Lovén, 1836) (additional source)
Margelopsidae Mayer, 1910 (basis of record)
Margelopsis Hartlaub, 1897 (additional source)
Melicertidae Agassiz, 1862 (basis of record)
Mitrocomella polydiademata (Romanes, 1876) (additional source)
Mitrocomidae Haeckel, 1879 (basis of record)
Modeeria Forbes, 1848 (additional source)
Moerisiidae Poche, 1914 (basis of record)
Monotheca Nutting, 1900 (additional source)
Monotheca obliqua (Johnston, 1847) (additional source)
Narcomedusae (basis of record)
Obelia Péron & Lesueur, 1810 (additional source)
Obelia dichotoma (Linnaeus, 1758) (additional source)
Obelia geniculata (Linnaeus, 1758) (additional source)
Obelia longissima (Pallas, 1766) (additional source)
Olindiasidae Haeckel, 1879 accepted as Olindiidae Haeckel, 1879 (basis of record)
Orthopyxis L. Agassiz, 1862 (additional source)
Orthopyxis integra (MacGillivray, 1842) (additional source)
Otohydridae Swedmark & Teissier, 1958 (basis of record)
Pandeiidae Haeckel, 1879 accepted as Pandeidae Haeckel, 1879 (basis of record)
Phialella Browne, 1902 (additional source)
Phialella quadrata (Forbes, 1848) (additional source)
Phialellidae Russell, 1953 (basis of record)
Polypodiidae Poche, 1914 (basis of record)
Polypodiidea (basis of record)
Polypodiozoa (basis of record)
Porpitidae Goldfuss, 1818 (basis of record)
Proboscidactyla Brandt, 1835 (additional source)
Proboscidactyla stellata (Forbes, 1846) (additional source)
Proboscidactylidae Hand & Hendrickson, 1950 (basis of record)
Proboscoida accepted as Leptothecata (basis of record)
Ptilocodiidae Coward, 1909 (basis of record)
Rathkea Brandt, 1837 (additional source)
Rathkea octopunctata (M. Sars, 1835) (additional source)
Rathkeidae Russell, 1953 (basis of record)
Rhopalonematidae Russell, 1953 (basis of record)