Acari: Hydrachnidia

  • Kees Davids
  • Antonio Di SabatinoEmail author
  • Reinhard Gerecke
  • Terence Gledhill
  • Harry Smit
  • Henk van der Hammen
Part of the Süßwasserfauna von Mitteleuropa book series (424)


Plesiotypically soft bodied mites, in many clades with more or less secondary sclerotization. At the larval stage characterized by (1) the anal opening usually surrounded by an undivided sclerite (probably apotypical: paired sclerites in Stygothrombidioidea, reduced sclerites in the subfamily Wandesiinae [Hydryphantoidea]); (2) Legs I/II never more than double the length of the idiosoma; (3) P-3 (genu) with two setae. Dimensions, coloration, and idiosoma sclerites variable in deutonymphs and adults, typically with (1) legs in a circular arrangement or restricted to the anteriormost part of the idiosoma; (2) palp five-segmented; (3) plesiotypically with 16 pairs of regularly arranged idiosomal glands associated with sensillae (apotypically with number of glands often reduced, rarely increased); (4) legs variable in shape, in many taxa with swimming setae.


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Copyright information

© Springer-Verlag GmbH Deutschland 2006

Authors and Affiliations

  • Kees Davids
    • 1
  • Antonio Di Sabatino
    • 2
    Email author
  • Reinhard Gerecke
    • 3
  • Terence Gledhill
    • 4
  • Harry Smit
    • 5
  • Henk van der Hammen
    • 6
  1. 1.Vakgroep Aquatische OecologieUniversiteit van AmsterdamAmsterdamNiederlande
  2. 2.Dipartimento di Scienze AmbientaliUniversity of L’AquilaL’AquilaItalien
  3. 3.TübingenDeutschland
  4. 4.Freshwater Biological AssociationAmbleside CumbriaGroßbritannien
  5. 5.Zoological MuseumUniversity of AmsterdamAmsterdamNiederlande
  6. 6.University of AmsterdamAmsterdamNiederlande

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