'Thank you, everyone.
I don´t understand all of the answers - There is very much "yes and no" in the Thread :-)
Am I right to understand it as a final answer as Schreckensteinia festaliella? - Or have I missed something in the thread?
I have photographed this Imago-specie in the neightbourhood, this summer - maximum 100 m from the larva-habitat
Dänemark, Grenaa, 10 m - 2½ km von Küste, . Tagfund/Freiland.
Gefunden an Rubus, 13 Juni 2013.
Foto: Kjeld Brem Sørensen.