Eine vergleichende Untersuchung über die Plastronstrukturen bei Milben (Acari)
In: Deutsche Entomologische Zeitschrift. Wiley-VCH: Weinheim; Berlin. ISSN 0012-0073, meer
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| Auteurs | | Top |
- Messner, B.
- Adis, J.
- Ribeiro, E.F.
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| Abstract |
Mites which show air (= plastron) retaining cuticular structure can be divided into three groups: Group I with direct formation of grooves on the entire surface of the body; group II with a ventrolateral channel system (= peritrema), wich is covered by hydrophobic trichomes and in connection with the stigmata; group III with a hydrophobic layer of scretory material (= cerotegument) which covers certain parts of the body or the entire body including the stigmata. — The stability of an air retaining cerotegument in the aquatic oribatid mite, Hydrozetes lacustris, is maintained through a pressure range of —98kPa (= 0.022 atm) to + 550kPa (=5.5 atm). The activity of plastron-bearing oribatid mites which are annually flooded for 6 months in Central Amazonian inundation forests, seems to depend on the concentration of dissolved oxygen in the water. First observations are given for one of these, “semi-aquatic” species, Rostrozetes foveolatus. |
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