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Thx for the suggestion, it is very nice that you give some input.

Brachycera does include Acalyptrata. Actually Brachycera is everything els that is not Nematocera. Brachycera can be split into Ortorapha and Cyclorapha. Cyclorapha includes Aschiza and Schizophora. Schizophora in turn has Acalyptrata and Calyptrata. So you are right, Acalyptrata would be a better way to narrow down the group this fly belongs to.

I could not decide between Spaheroceridae and Chloropidae. In fact I am pretty sure this is a Chloropid now. There are lots of Chioropid features visible on this image, even though it is too blurry for chaetotaxy. But maybe someone will sitck out his.her head and suggest a genus.