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I'm sorry Jan, but I found that I have still doubts about my ID of this fly. I remembered that I've seen this fly several times and collected it. Only today I found in my not-ID Muscidae material what I looked for (see photo). This fly has 4 scutellar setas and my test keyed as Coenosia testacea.
I suspect that it is the same fly as yours.
I wrote a message to Martin Suvak (it seems that he likes and knows Coenosia) and asked him to check this thread.
Nikita