Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Subclass: Acari
Order: Trombidiformes
Suborder: Prostigmata
(unranked): Parasitengona
(unranked): Hydrachnidia
  • Arrenuroidea
  • Eylaoidea
  • Hydrachnoidea
  • Hygrobatoidea
  • Hydrovolzioidea
  • Hydryphantoidea
  • Lebertioidea
  • Stygothrombidioidea
  • Hydracarina
  • Hydrachnellae

Hydrachnidia, also known as "water mites", Hydracarina or Hydrachnellae, are a group of mites covering more than 40 families and 5 000 species (Smith & Cook 1991) found in freshwater and marine habitats. As water mites of Africa, Asia, and South America have not been well-studied, the numbers are likely to be far greater. Other taxa of parasitengone mites include species with semi-aquatic habits, but only the Hydracarina are properly subaquatic. They exist in a variety of freshwater bodies, such as treeholes, hot springs, deep lakes and waterfalls, and some have adapted to marine environments. [2][1]


  1. 1 2 Di Sabatino, A., Gerecke, R., Martin, P. (2000). "The biology and ecology of lotic water mites (Hydrachnidia)". Freshwater Biology. 44 (1): 47–62. doi:10.1046/j.1365-2427.2000.00591.x.
  2. http://eol.org/pages/3020370/details
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