Page last updated Thu 04 May 2017


Use the links to navigate the hierarchy of invertebrate classification.

  Subphylum Medusozoa

Class Hydrozoa (hydroids)

    Subclass Hydroidolina -- Wisconsin!
    Subclass Trachylinae -- Wisconsin!

Taxon Information

The Class Hydrozoa has been reported (or is assumed) to occur in fresh waters. This taxon has been reported from Wisconsin.

(These statements were generated automatically from the WInvertebrates database.)

Literature Records

  • Hydrozoa, (Jankowski et al., 2008).
  • Hydrozoa, "approximately 3,500 valid species" (Daly et al., 2007).
  • Hydrozoa, (Jankowski, 2001).


  • Jankowski, T., A.G. Collins & R. Campbell. 2008. Global diversity of inland water cnidarians. Hydrobiologia 595: 35-40. [Available online]
  • Daly, M., M.R. Brugler, P. Cartwright, A.G. Collins, M.N. Dawson, D.G. Fautin, S.C. France, C.S. McFadden, D.M. Opresko, E. Rodriguez, S.L. Romano & J.L. Stake. 2007. The phylum Cnidaria: A review of phylogenetic patterns and diversity 300 years after Linnaeus. Zootaxa 1668: 127-182. [Available online]
  • Jankowski, T. 2001. The freshwater medusae of the world — a taxonomic and systematic literature study with some remarks on other inland water jellyfish. Hydrobiologia 462: 91-113. [Available online]

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