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It has been suggested that this is a Heleomyzidae (based on venation), but the tibiae are too bristly to comply.
It has the wrong venation for Muscidae, and Fanniidae (on the basis of the anal veins).
It has been suggested it looks something like Pegomya bicolor (Anthomyiidae), and indeed it does. The venation on that is very similar, but not identical. In addition, the costa does not have any but the smallest spines, indicating that it might not even be an Anthomyiidae. I think the images showing small spines shows it is not a matter of insufficient resolution.
This fly looks quite distinctive, but I cannot even place it in a family! Does anyone know the answer?