Thread subject: Diptera.info :: Fannia sp.?
Posted by Robert Heemskerk on 03-02-2008 20:23
#1
hi flyforum,
This afternoon, I found this fly on bark of Ash.
It looks like Fannia to me but I am not sure.
Size ~8mm
place: Amsterdam forest
temperature: 5 degrees
Posted by Robert Heemskerk on 03-02-2008 20:23
#2
pic 2
Edited by Robert Heemskerk on 03-02-2008 20:24
Posted by Robert Heemskerk on 03-02-2008 20:24
#3
pic 3
Edited by Robert Heemskerk on 03-02-2008 20:24
Posted by Stephane Lebrun on 03-02-2008 20:51
#4
Fannia don't have 4 dc beyond suture. It's a Muscidae, I think
Hebecnema. In this case, it should be
Hebecnema nigra with white parafacialia, entirely black legs and virtually bare eyes.
Posted by Robert Heemskerk on 03-02-2008 21:42
#5
Thank you Stephane, for your explanation.
I have watched several Fannia's and they have less dc beyond suture (mostly 3?).
The suture isn't always good visible on these Fannia sp.? (just a bit)
Is Hebecnema nigra a winter species? or a early spring species?
My second Muscidae sp. in winter, so far.
Posted by Stephane Lebrun on 03-02-2008 22:08
#6
Fannia have not a well marked suture indeed, and 2+3 dc. Other differences are : arista never plumose (only Piezura have into Faniidae), wing venation particular (especially Sc, A1 and A2).
Hebecnema nigra flight period is said IV-IX, so this one is two months earlier than usual.