Hydrozoa Owen, 1843
Classification
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Cnidaria Hatschek, 1888
- Hydrozoa Owen, 1843
Acalepha Beyrich, 1849
Actinulida Swedmark & Teissier, 1958
Aequoureidae
Agalmidae
Amphicaryoninae
Anthoathecata Cornelius, 1992
Anthophysidae
Archaeoantennularia Decker, 1952
Archaeolafoea Chapman, 1919
Archaeonectris Huckriede, 1967
Arythia Lendenfeld, 1888
Astrorhizopora Schnorf-Steiner, 1958
Aysenspriggia Bell, Angseesing & Townsend, 2001
Baastadiostroma Brood, 1972
Belitsia Nikolov & Shopov, 1967
Beltanelliformis Menner, 1974
Bullatella Bogoyavlenskaya, 1977
Burgundostromaria Turnsek, 1970
Calycellidae
Calycopsidae
Cambrohydra
Cambrostroma Vlasov, 1961
Cancellatodictyon Khalfina & Yavorskii, 1971
Cancellistroma Sheng, 1991
Cerkesia Moiseev, 1944
Chrysomitra Gegenbaur, 1856
Clathrozonidae
Clavidae
Clyxhydra
Codonidae
Concentristroma Sheng, 1991
Crucimedusina Harrington & Moore, 1955
Cycloporidium Parona, 1909
Cystodictyon Yavorskii, 1971
Cytaeidae
Delheidia Dollfus, 1898
Diamantopora Weissermel, 1913
Discalioides Nel, Gill & Nury, 1987
Disconalia Haeckel, 1888
Discophyllum Hall, 1847
Drevoella
Drevooella
Drevotella Nitecki & Richardson, 1972
Eisenackiella Taylor, 1988
Eleutheriidae Russell, 1953
Ellipsomedusa Wang Mincheng, 1991
Emscheria Schnorf-Steiner, 1958
Eoporpita Wade, 1972
Epallohydra Kozlowski, 1959
Epopea Gistl, 1847
Eutimidae
Evagora Péron & Lesueur, 1810
Filelloides Jarms & Voigt, 1994
Flexihydra Kozlowski, 1959
Fungistroma Sheng, 1991
Gelenptron
Gerronostromina Khalfina & Yavorskii, 1971
Gezhenpuia Niu & Wang, 1988
Globostroma Birenheide, 1969
Graptogeitonia Ruedemann, 1934
Halorhiza Stechow, 1962
Haplomerismos Cairns, 1978
Haplorhiza Agassiz, 1862
Heterastrididae Frech, 1890
Heterostephanus Allman, 1864
Hydrocsaspedota
Hydronema Stechow, 1921
Intexodictyonella Yavorskii, 1969
Jillua Krumbeck, 1914
Kristinella Richters, 1913
Kullingia Glaessner, 1979
Laingiidae
Laodieidae
Lemniscateridae Montanaro-Gallitelli
Leptothecata Cornelius, 1992
Likinia Ivanova & Il'khovskii, 1973
Limnomedusae Kramp, 1938
Lorenzinites Glaessner & Wade, 1966
Madigania Sprigg, 1949
Mazohydra Schram & Nitecki, 1975
Mesodendrium Waggoner & Langer, 1993
Mesokylix Eisenack, 1935
Mica Margulis, 1982
Mississippidendrium Waggoner & Langer, 1996
Narcomedusae Haeckel, 1879
Nausithus Rafinesque, 1815
Neosyrlngostroma Kazmierczak, 1971
Nigriporella Rigby, 1958
Oceanidae Eschscholtz, 1829
Octocannoidae Bouillon, Boero & Seghers, 1991
Orchistomatidae Bouillon, 1984
Orithya Risso, 1826
Orithyia Agassiz, 1846
Orithyja Oken, 1815
Orythia Péron & Lesueur, 1810
Orythya Oken, 1815
Ovatoscutum Glaessner & Wade, 1966
Palaelophacmaea Donaldson, 1962
Palaeokylix Eisenack, 1932
Palaeomillepora Gabilly & Lafuste, 1957
Palaeonectris
Paleohydra Korde, 1985
Paragotoeidae
Paramilleporella Fenninger, 1965
Parkeria Carpenter, 1869
Parleria
Paronaria Termier & Termier, 1984
Permostroma Sheng, 1991
Philippinactinia Yabe & Sugiyama, 1939
Phragmohydra Kozlowski, 1959
Picnodictyon Mori, 1970
Plectrostroma Nestor, 1964
Plumalecium Antsulevich, 1982
Plumalina Hall, 1858
Polysyphonia Ledenfeld, 1887
Pontifennia
Praeactinostroma Khalfina, 1960
Progonionemus Grauvogel & Gall, 1963
Protolyella
Protulophila Rovereto, 1901
Psammactinia
Pulemidae
Quadratimedusa Wang Mincheng, 1991
Rhabdohydra Kozlowski, 1959
Rhizostromella Parona, 1909
Rhysomedusa Vannucci & Soares Moreira, 1966
Roseoporella Spriestersbach, 1935
Rotadiscus Sun & Hou, 1987
Rotamedusa Simpson, 1969
Russelliidae Kramp, 1957
Sajanella Vologdin, 1966
Salacia Haeckel, 1888
Sarawakia Hashimoto, 1973
Scaniostroma Brood, 1972
Siphonophorae Eschscholtz, 1829
Sphaeragalma Margulis, 1976
Spriggia Southcott, 1958
Stepanyantsia Margulis, 1982
Stictostromella Galloway & St. Jean, 1956
Stoliczkaria Duncan, 1878
Stoliczkiella Carter, 1888
Stromactinia Vinassa de Regny, 1911
Subaxopora Deng, 1982
Thaumantiadidae
Tiaridae
Trachymedusae Haeckel, 1866
Tubuloparietes Schnorf, 1960
Tuvaechia Bogoyavlenskaya, 1971
Velellidae
Velubrella
Veluibrella
Velumbrella Stasinska, 1960
Vicinustachyodes Yavorskii, 1961
Xenohydra Kozlowski, 1959
Yabestroma Hashimoto, 1970
Yezoactinia Hashimoto, 1960
- Hydrozoa Owen, 1843