Can anyone give a help identifying some Pisidium species?

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Ton van Haaren

I can give it a try, but please say something about its habitat (river, pond, lake etc.). send the photo's to [email protected].

Change the subject, for his has nothing to do with psychology :-) although Pisidium/Euglesa may drive some malacalogists to madness

Michael L. Zettler

Additional the geographical origin of your material would be good to know.