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I love species that can be told apart by DNA differences only :|
Well, Jere is an excellent dipterist, but I wonder why this should be G. minor, given that there is only this one picture. G. minor should have a ad seta on the mid tibia, which I cannot detect (the part is out of focus). Furthermore, the grey middle stripe on the thorax should be much darker than the neighbouring ones (with the dc). I do not see such a difference. However, as Nikita pointed out, these characters are variable, so it seems we have to rely on the DNA alone...