Nominal Species (n = 12) |
Present allocation (n = 12) |
Ref. |
Hydra americana Hyman, 1929 |
Hydra americana |
19 |
Hydra canadensis Rowan, 1930 |
Hydra canadensis |
19 |
Hydra carnea Agassiz, 1850 |
Hydra carnea |
19 |
Hydra cauliculata Hyman, 1938 |
Hydra cauliculata |
19 |
Chlorohydra hadleyi Forrest, 1959 |
Chlorohydra hadleyi |
19 |
Hydra hymanae Hadley & Forrest, 1949 |
Hydra hymanae |
19 |
Hydra littoralis Hyman, 1931 |
Hydra littoralis |
19 |
Hydra minima Forrest, 1963 |
Hydra minima |
1663 |
Hydra oligactis Pallas, 1766 |
Hydra oligactis |
19 |
Hydra oregona Griffin & Peters, 1939 |
Hydra oregona |
19 |
Hydra rutgersensis Forrest, 1963 |
Hydra rutgersensis |
1663 |
Hydra utahensis Hyman, 1931 |
Hydra utahensis |
19 |