Aglaopheniidae Marktanner-Turneretscher, 1890 (basis of record)
Anthoathecata (basis of record)
Blackfordiidae Bouillon, 1984 (basis of record)
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 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)
Eleutheriidae Russell, 1953 accepted as Cladonematidae Gegenbaur, 1857 (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)
Hydractinia carnea (M. Sars, 1846) accepted as Podocoryna carnea M. Sars, 1846 (additional source)
Hydractiniidae L. Agassiz, 1862 (basis of record)
Hydroidolina (basis of record)
Leptothecata (basis of record)
Limnomedusae (basis of record)
Margelina Haeckel, 1879 (basis of record)
Moerisiida Poche, 1914 (basis of record)
Moerisiidae Poche, 1914 (basis of record)
Obelia Péron & Lesueur, 1810 (additional source)
Obelia longissima (Pallas, 1766) (additional source)
Olindiasidae Haeckel, 1879 accepted as Olindiidae Haeckel, 1879 (basis of record)
Proboscoida accepted as Leptothecata (basis of record)
Rathkea Brandt, 1837 (additional source)
Rathkea octopunctata (M. Sars, 1835) (additional source)
Rathkeidae Russell, 1953 (basis of record)
Sarsia Lesson, 1843 (additional source)
Sarsia tubulosa (M. Sars, 1835) (additional source)
Trachylinae (basis of record)
Tubulariida accepted as Tubulariidae Goldfuss, 1818 (basis of record)
Tubulariidae Goldfuss, 1818 (basis of record)