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Pity the fly was not collected.

The lacking topvein is clearly aberrant, you can see still some part of it at its apex.
Phytomyptera are all very blackish (in Europe), and Actia it cannot be for the reaons given above.
Looks more like some Goniini or possibly Blondeliini.

In any case, missing topcel is likely to be aberrant.
It is weird, but it happens.

Theo