| |
| Kingdom Animalia |
| |
Acaulidae -- valid |
| |
Actinulida Swedmark and Teissier, 1958 -- valid |
| |
Anthoathecatae -- valid -- athecate hydroids, hydromedusae |
| |
Armorhydridae Swedmark and Teissier, 1958 -- valid |
| |
Balellidae Stechow, 1922 -- valid |
| |
Bougainvilliidae Lütken, 1850 -- valid |
| |
Bythocellata Nair, 1951 -- valid |
| |
Bythotiara Günther, 1903 -- valid |
| |
Bythotiaridae Maas, 1905 -- valid |
| |
Calycophorae -- valid |
| |
Calycopsis Fewkes, 1882 -- valid |
| |
Candelabridae Stechow, 1921 -- valid |
| |
Capitata Kühn, 1913 -- valid |
| |
Cladocorynidae Allman, 1872 -- valid |
| |
Cladonematidae Gegenbaur, 1857 -- valid |
| |
Corymorphidae Allman, 1872 -- valid |
| |
Corynidae Johnston, 1836 -- valid |
| |
Cystonectae -- valid |
| |
Cytaeididae L. Agassiz, 1862 -- valid |
| |
Eudendriidae -- valid |
| |
Eumedusa Bigelow, 1920 -- valid |
| |
Filifera Kühn, 1913 -- valid |
| |
Halammohydridae Remane, 1927 -- valid |
| |
Halimedusidae Arai and Brinckmann-Voss, 1980 -- valid |
| |
Heterotiara Maas, 1905 -- valid |
| |
Hydractiniidae L. Agassiz, 1862 -- valid |
| |
Hydridae -- valid |
| |
Hydrocorynidae Rees, 1957 -- valid |
| |
Kanaka Uchida, 1947 -- valid |
| |
Leptothecatae -- valid -- thecate hydroids, hydromedusae |
| |
Limnocnididae -- invalid |
| |
Limnomedusae Kramp, 1938 -- valid |
| |
Margelopsidae Uchida, 1927 -- valid |
| |
Milleporidae Fleming, 1828 -- valid -- fire corals |
| |
Moerisiidae Poche, 1914 -- valid |
| |
Narcomedusae Haeckel, 1879 -- valid |
| |
Oceania Péron and Lesueur, 1810 -- valid |
| |
Oceanidae Eschscholtz, 1829 -- valid |
| |
Otohydridae Swedmark and Teissier, 1958 -- valid |
| |
Pachycordyle Weismann, 1883 -- valid |
| |
Pandeidae Haeckel, 1879 -- valid |
| |
Pennaria Goldfuss, 1820 -- valid |
| |
Pennariidae McCrady, 1859 -- valid |
| |
Physonectae -- valid |
| |
Polyorchidae Agassiz, 1862 -- valid |
| |
Polypodiidae -- valid |
| |
Porpitidae Goldfuss, 1818 -- valid |
| |
Proboscidactylidae Hand and Hendrickson, 1950 -- valid |
| |
Protohydridae -- valid |
| |
Rathkeidae Russell, 1953 -- valid |
| |
Russelliidae Kramp, 1957 -- valid |
| |
Sibogita Maas, 1905 -- valid |
| |
Siphonophorae -- valid -- siphonophores |
| |
Solanderiidae Marshall, 1892 -- valid |
| |
Sphaerocorynidae Prévot, 1959 -- valid |
| |
Tetraplatidae -- valid |
| |
Trichydridae Hincks, 1868 -- valid |
| |
Tubulariidae Fleming, 1828 -- valid |
| |
Zancleidae Russell, 1953 -- valid |
| |
Zancleopsidae Bouillon, 1978 -- valid |
| |
|