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Hi Ton, very interesting..

I did not collect it, but a colleague asked me for help and sent me the photos..
It was collected in a river called Feistritz at the border Styria/Slovenia. They do research about Macrozoobenthos. The sampling methode they use is called "MHS" = multi habitat sampling. One sample contains MZB of 20 diferent locations (microhabitats) in the river, also close to the river bank.It could be aquatic or semiaquatic, at least.

Thank you for your help - and the contact adresses, I will send them a E-Mail.

I will let you know the results, of course.
Helge