Page last updated Wed 05 Feb 2020


Image from Water Mites of North America.

Use the links to navigate the hierarchy of invertebrate classification.

  Family Hydrachnidae

Genus Hydrachna

    Species H. baculoscutata
    Species H. canadensis
    Species H. conjecta
    Species H. crenulata
    Species H. cruenta
    Species H. geographica
    Species H. hesperia
    Species H. hungerfordi
    Species H. hutchinsoni
    Species H. leegei
    Species H. magniscutata
    Species H. marshallae
    Species H. microscutata
    Species H. miliaria
    Species H. mystomirabilis
    Species H. rotunda
    Species H. stipata

Taxon Information

The Genus Hydrachna has been reported (or is assumed) to occur in fresh waters. This taxon has been reported from midwestern states of North America.

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

Literature Records

  • Hydrachna, [North America] (Smith et al., 2010).
  • Hydrachna, [North Central United States] (Underhill et al., 1982).
  • Hydrachna, "About 20 species, subspecies, and varieties recorded from [North America] in 5 subgenera... Distr.: N.A., S.A., Eu., Af., As., E.I., Aus." (Newell, 1959).
  • Hydrachna (Anohydrachna), (Newell, 1959).
  • Hydrachna (Rhabdohydrachna), (Newell, 1959).
  • Hydrachna (Diplohydrachna), (Newell, 1959).
  • Hydrachna (Scutohydrachna), (Newell, 1959).


  • Smith, I.M., D.R. Cook & B.P. Smith. 2010. Water mites (Hydrachnidiae) and other arachnids. [in] J.H. Thorp & A.P. Covich (eds.). Ecology and Classification of North American Freshwater Invertebrates, 3rd edition: 485-586.
  • Underhill, J.C., W.D. Schmid & D.E. Gilbertson. 1982. Taxonomic Keys to the Common Animals of the North Central States, exclusive of the parasitic worms, terrestrial insects, and birds, 4th edition. 205 pp.
  • Newell, I.M. 1959. Acari. [in] W.T. Edmondson (ed.). Ward & Whipple Fresh-Water Biology, 2nd edition: 1080-1116.

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