Actinulida (basis of record)
Aeginidae Gegenbaur, 1857 (basis of record)
Aglantha Haeckel, 1879 (additional source)
Aglaopheniidae Marktanner-Turneretscher, 1890 (basis of record)
Anthoathecata (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)
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)
Cladonematidae Gegenbaur, 1857 (basis of record)
Clytia Lamouroux, 1812 (additional source)
Clytia gracilis (M. Sars, 1851) (additional source)
Clytia hemisphaerica (Linnaeus, 1767) (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)
Ectopleura L. Agassiz, 1862 (additional source)
Eirene Eschscholtz, 1829 (additional source)
Eirenidae Haeckel, 1879 (basis of record)
Filifera (basis of record)
Haleciidae Hincks, 1868 (basis of record)
Hybocodon L. Agassiz, 1860 (additional source)
Hydractinia Van Beneden, 1844 (additional source)
Hydractiniidae L. Agassiz, 1862 (basis of record)
Hydroidolina (basis of record)
Lafoeidae Hincks, 1868 (basis of record)
Laodiceidae Agassiz, 1862 (basis of record)
Leptothecata (basis of record)
Leuckartiara Hartlaub, 1914 (additional source)
Limnomedusae (basis of record)
Melicertidae Agassiz, 1862 (basis of record)
Mitrocomella polydiademata (Romanes, 1876) (additional source)
Mitrocomidae Haeckel, 1879 (basis of record)
Modeeria Forbes, 1848 (additional source)
Narcomedusae (basis of record)
Obelia Péron & Lesueur, 1810 (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)
Proboscidactyla Brandt, 1835 (additional source)
Proboscidactylidae Hand & Hendrickson, 1950 (basis of record)
Proboscoida accepted as Leptothecata (basis of record)
Ptychogastriidae Mayer, 1910 (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)
Sarsia Lesson, 1843 (additional source)
Sarsia tubulosa (M. Sars, 1835) (additional source)
Sertularia Linnaeus, 1758 (additional source)
Sertulariidae Lamouroux, 1812 (basis of record)
Tiarannidae Russell, 1940 (basis of record)
Tiaropsidae Boero, Bouillon & Danovaro, 1987 (basis of record)
Trachylinae (basis of record)
Trachymedusae (basis of record)
Tubulariidae Goldfuss, 1818 (basis of record)