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I believe these are posterior bristles (pd I would say). av should be on the other side I think. I can also see several ad on an other angle of view but that's all for well-defined bristles.

There may be broken bristles since this fly was clearly not a new born when I caught it. Unfortunately, I'm afraid I'm not able to see if there are sockets of broken bristles. I don't have a good microscope and with a magnifying glass (or on pictures), I can't see anything obvious.

But, if the genitalia are different from the other species, can it be something else ? In another genus ?