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Hello Reinoud,

Thats exactly the problem, the lack of available literature. I just have some literature of the Dutch species, which is of course absolutely insufficient. Unfortunately i also do not have the key by Engel you are referring to.

And i thought this would be the easy one, because i have some other species from that region as well ;)

I appriciate the effort you have put in it untill now.

Here are the pictures you requested, hope ther is sufficient detail on them.