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Today 26. viii 2010 I caught this female Fannia sp. in deciduous forest near Copenhagen – as far as I remenber swept from grass.
All of the body is greyish black without vittae or spots and subshining; inner posterior margin of hind coxae hairy; the presutural acrostichals are triserial. There is no av on t2, but as I see it a distinctly ventral seta.
In the key I end up with F. subpubescens. Is that a good call...?
Body length ~ 4 mm.

Please shed some light on my ignorance :)

Regards,

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From what i can see, seems the lower incurved fronto-orbitals not below level of insertion of arista ...
And are the palps dilated..seems not
I am thinking about Fannia carbonaria. (arista yellow at base)
But i struggle always with Fannia :@

Joke

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Thanks for trying, Joke. I'm having the same difficulties with Fannia - especially the females :(

All the same it cannot be carbonaria because of the hairy hind coxae and the fronto-orbital plates aren't shining black but grey pollinose.

The question remains open...

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Another try with the key from Hennig:
Midcoxa without spine like bristle....
Gena not with 3-4 rows of britles...
Hindcoxa with 1 or more hairs....
Tergites of abdomen not with black rounded spots...
Midtibia with av (far on inner site)....
Midtibia with more ad setae....

Then two possibilities:
F.nitida (but has no pv on midtibia and orbitalplate strong convex)
F.polychaeta...orbitalplate less convex and midtibia with strong av and pv
Seems to fit, but Hennig mentioned only 1 strong av and 1 strong pv in female (characteristic)
And it looks if there are 2 pv...?

If i go further in the key the midtibia has only 1ad, so it almost has to be .....F.polychaeta :D

Joke

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Correct, Joke.
F. polychaeta has on t2 1-2(3)av and 1-2 pv.

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Great! Thank you.

An anteroventral in a ventral position... isn't that stretching it a bit ;)

I already have the male in my collection.

Regards,