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Alghero, Sardinia 04/04/2011 dimensions: around 5 mm.
ID possible? Thanks in advance for your help.

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Photo 2

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Photo 3

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Excellent work, and I still can't make the species.

I could do with a shot of the thorax obliquely from behind (so 45 degree angle, not 90 degree as above).

Or, alternatively, a lateral shot of the male genitalia.

It might be clavatum.


Theo

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Thanks Theo,
sorry I have been awkward and trying to photograph it I have destroyed the pinned fly.
I hope to capture it again.

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Well, that is not possible since those Gymnosoma are all so similar and they often fly intermixed.

I'm 90 % confident that this is a male clavatum.

So the last 10 % remain uncertain.


Theo

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Thanks Theo,
it's not hard to meet it again, in Sardinia Cerretti signals 3 Gymnosoma:
the rungsi that I easily recognize for the absence of vibrissa and bristles perivibrissal,
the clavatum
the rotundatum.