Global diversity of inland water cnidarians

  • Thomas JankowskiEmail author
  • Allen G. Collins
  • Richard Campbell
Part of the Developments in Hydrobiology book series (DIHY, volume 198)


Global diversity of inland water cnidarians is low, containing <40 species belonging to phylogenetically distinct groups representing independent invasion events: the common and cosmopolitan hydras (12–15 species); the sporadically occurring freshwater medusae (6–16 sp.); the Cordylophorinae (2 sp.); the parasitic Polypodium (1 sp.); the medusae occurring in saline lakes (4 sp.). Freshwater cnidarians inhabit nearly all types of freshwater on all continents (except Antarctica), but only a few species have cosmopolitan distributions. Due to uncertainty in species knowledge, fine scale regions of endemicity are not yet clear.


Hydra Polypodium Cordylophora Craspedacusta Distribution Species diversity Freshwater cnidarian 


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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Thomas Jankowski
    • 1
    Email author
  • Allen G. Collins
    • 2
  • Richard Campbell
    • 3
  1. 1.Water Resources DepartmentSwiss Federal Institute of Aquatic Science and Technology (Eawag)DubendorfSwitzerland
  2. 2.NMFS, National Systematics Laboratory, National Museum of Natural History, MRC-153Smithsonian InstitutionWashingtonUSA
  3. 3.Department of Developmental and Cell BiologyUniversity of CaliforniaIrvineUSA

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