Aglaopheniidae Marktanner-Turneretscher, 1890 (basis of record)
Amphisbetia L. Agassiz, 1862 (additional source)
Amphisbetia operculata (Linnaeus, 1758) (additional source)
Anthoathecata (basis of record)
Blackfordiidae Bouillon, 1984 (basis of record)
Bougainvillia Lesson, 1830 (additional source)
Bougainvillia muscus (Allman, 1863) (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 hemisphaerica (Linnaeus, 1767) (additional source)
Corymorpha M. Sars, 1835 (additional source)
Corymorphidae Allman, 1872 (basis of record)
Corynidae Johnston, 1836 (basis of record)
Ectopleura L. Agassiz, 1862 (additional source)
Eirenidae Haeckel, 1879 (basis of record)
Eucheilota McCrady, 1859 (additional source)
Eutima McCrady, 1859 (additional source)
Filifera (basis of record)
Gonionemus vertens A. Agassiz, 1862 (additional source)
Haleciidae Hincks, 1868 (basis of record)
Hydractinia Van Beneden, 1844 (additional source)
Hydractiniidae L. Agassiz, 1862 (basis of record)
Hydroidolina (basis of record)
Lafoeidae Hincks, 1868 (basis of record)
Laodicea Lesson, 1843 (additional source)
Laodiceidae Agassiz, 1862 (basis of record)
Leptothecata (basis of record)
Limnomedusae (basis of record)
Lovenella Hincks, 1868 (additional source)
Margelopsidae Mayer, 1910 (basis of record)
Moerisiidae Poche, 1914 (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)
Orthopyxis L. Agassiz, 1862 (additional source)
Pennariidae McCrady, 1859 (basis of record)
Phialella Browne, 1902 (additional source)
Phialella quadrata (Forbes, 1848) (additional source)
Phialellidae Russell, 1953 (basis of record)
Porpita porpita (Linnaeus, 1758) (additional source)
Porpitidae Goldfuss, 1818 (basis of record)
Protiaridae Haeckel, 1879 (basis of record)
Rhopalonematidae Russell, 1953 (basis of record)
Sarsia Lesson, 1843 (additional source)
Sarsia eximia (Allman, 1859) accepted as Coryne eximia Allman, 1859 (additional source)
Sertularia Linnaeus, 1758 (additional source)
Sertularia marginata (Kirchenpauer, 1864) accepted as Tridentata marginata (Kirchenpauer, 1864) (additional source)
Sertulariidae Lamouroux, 1812 (basis of record)
Sphaerocorynidae Prévot, 1959 (basis of record)
Tiaropsidae Boero, Bouillon & Danovaro, 1987 (basis of record)
Trachylinae (basis of record)
Trachymedusae (basis of record)
Trichydra Wright, 1858 (additional source)
Trichydra pudica Wright, 1857 (additional source)
Trichydridae Hincks, 1868 (basis of record)
Tubulariidae Goldfuss, 1818 (basis of record)
Turritopsis McCrady, 1857 (additional source)