Fly ID challenge

This robust sized leftovers of  fly - a Muscid (I think - no hypopleural bristles) was in a sample collected from a conservatory last summer. I don't think there is much chance of putting a name to it, but the crossvein Dm-Cu is rather unusual in its shape. Does this point to any species? I have not seen it before. Click images to enlargemuscidmuscid 2

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