Diptera.info

Posted by Robert Heemskerk on 05-10-2008 22:41

Hi flyforum,

Last week I found this fly.
I cannot see what kind of fly.., My guess is Muscidae and perhabs Thricops?

If anyone can help me some further, you're welcome..
from what I see, the arista is bare.
Obvious are the dark lines between the tergites (abdomen)
Also the fly got many grey and the eyes are a bit traffic red..

date: 20-09-2008
place: Amsterdam forest

Edited by Robert Heemskerk on 05-10-2008 22:46

Posted by Stephane Lebrun on 06-10-2008 08:10

This is a female Fannia : hemispherical head with broad orbital plates, bare arista, 2 strong upper orbital setae, one reclinate, the other inclined outward, typical subcosta shape (straight and diverging from R1 close to its base), A1 very short while A2 is long and bent and stop beyond apex of A1, 3 post dc and complete row of ac, a true submedian dorsal seta on hind tibia...

Edited by Stephane Lebrun on 06-10-2008 09:18

Posted by Nikita Vikhrev on 06-10-2008 12:14

I'd say, it is Fannia of canicularis-subgroup, either F.difficilis or F.canicularis itself.
Nikita

Posted by Robert Heemskerk on 07-10-2008 00:04

Thank you very much Stephane and Nikita, for your explanation and suggestion.

The typical subcosta shape (straight and diverging from R1 close to its base), is rather good visible and I should have known.., Xespok told me before..

In the dutch specieslist, there is no F. difficilis?
Perhabs this list is not complete..?

I read that Fannia is a very large genus of approximately 288 species of flies. ''The genus was orriginally described by the French entomologist Jean-Baptiste Robineau-Desvoidy in 1830. A number of species were formally placed in the genus Musca''

So, it wasn't bad at all thinking it was Muscidae ;)