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Date:24/04/2018
Location:Austria, Wien, Kalksburg
 
Copyright:Per Hoffmann Olsen
Camera:Canon EOS 50D
Lens:Sigma 150mm 1:2.8 APO Macro
 

There are 5 species in Austria, where at least 3 of them are very similar. 

I used the Key-characters explained on this website: http://www.lepiforum.de/lepiwiki.pl?Alucita_Huebneri and now I am about 80% certain, that this is the A. huebneri.