IRMNG Taxon list
Chlorohydra hadleyi Forrest, 1959
Chlorohydra viridissima (Pallas, 1766)
Hydra aculeata Wagner, 1833 accepted as Hydractinia aculeata (Wagner, 1833)
Hydra americana Hyman, 1929
Hydra attenuata Pallas, 1766 accepted as Hydra circumcincta Schulze, 1914
Hydra baikalensis Swarczewski, 1923
Hydra beijingensis Fan, 2003
Hydra braueri Bedot, 1912 accepted as Hydra circumcincta Schulze, 1914
Hydra brunnea Templeton, 1836
Hydra canadensis Rowan, 1930
Hydra carnea Agassiz, 1851
Hydra cauliculata Hyman, 1938
Hydra circumcincta Schulze, 1914
Hydra corala Elrod & Ricker, 1902 accepted as Hydra oligactis Pallas, 1766
Hydra daqingensis Fan, 2000
Hydra dioecia Downing, 1905 accepted as Hydra oligactis Pallas, 1766
Hydra ethiopiae Hickson, 1930
Hydra graysoni Maxwell, 1972
Hydra hadleyi (Forrest, 1959)
Hydra harbinensis Fan & Shi, 2003
Hydra hexactinella von Lendenfeld, 1886
Hydra hymanae Hadley & Forrest, 1949
Hydra iheringi Cordero, 1939
Hydra intaba Ewer, 1948
Hydra intermedia De Carvalho Wolle, 1978
Hydra japonica Itô, 1947
Hydra javanica Schulze, 1927
Hydra liriosoma Campbell, 1987
Hydra littoralis Hyman, 1931
Hydra madagascariensis Campbell, 1999
Hydra magellanica Schulze, 1927
Hydra magnipapillata Itô, 1947
Hydra mariana Cox & Young, 1973
Hydra minima Forrest, 1963
Hydra mohensis Fan & Shi, 1999
Hydra monoecia Hefferan, 1902 accepted as Hydra oligactis Pallas, 1766
Hydra multicornis Forsskål, 1775 accepted as Clava multicornis (Forsskål, 1775)
Hydra oligactis Pallas, 1766
Hydra oregona Griffin & Peters, 1939
Hydra orientalis Annandale, 1905
Hydra ovata Boecker, 1920 accepted as Hydra circumcincta Schulze, 1914
Hydra oxycnicoides Schulze, 1927 accepted as Hydra oxycnida Schulze, 1914
Hydra oxycnida Schulze, 1914
Hydra pallida Beardsley, 1904 accepted as Hydra oligactis Pallas, 1766
Hydra paludicola Itô, 1947
Hydra paranensis Cernosvitov, 1935
Hydra parva Itô, 1947
Hydra pirardi Brien, 1961 accepted as Hydra oxycnida Schulze, 1914
Hydra plagiodesmica Dioni, 1968
Hydra polymorpha Chen & Wang, 2008
Hydra pseudoligactis (Hyman, 1931) accepted as Hydra canadensis Rowan, 1930
Hydra rhaetica Asper, 1879 accepted as Hydra oligactis Pallas, 1766
Hydra robusta (Itô, 1947)
Hydra roeselii Haacke, 1879 accepted as Hydra oligactis Pallas, 1766
Hydra rubra Lewes, 1860
Hydra rutgersensis Forrest, 1963
Hydra salmacidis Lang da Silveira, Souza-Gomes & de Souza e Silva, 1997
Hydra shenzhensis Wang & Deng, 2012
Hydra sinensis Wang, Deng, Lai & Li, 2009
Hydra squamata Müller, 1776 accepted as Clava squamata (Müller, 1776) accepted as Clava multicornis (Forsskål, 1775)
Hydra stellata Schulze, 1914 accepted as Hydra circumcincta Schulze, 1914
Hydra tenuis Ayres, 1856
Hydra thomseni Cordero, 1941
Hydra trembleyi Haacke, 1879 accepted as Hydra vulgaris Pallas, 1766
Hydra umfula Ewer, 1948
Hydra utahensis Hyman, 1931
Hydra verrucosa Templeton, 1836
Hydra viridissima Pallas, 1766
Hydra vulgaris Pallas, 1766
Hydra zeylandica Burt, 1929
Hydra zhujiangensis Liu & Wang, 2010
Pelmatohydra baikalensis (Swarczewski, 1923)
Pelmatohydra oligactis (Pallas, 1766) accepted as Hydra oligactis Pallas, 1766