Diptera.info

Posted by brigitteu on 19-01-2011 00:03

Hi

Switzerland, 27.08.2009, Edge of a wood, near small bond, about 790 msm

Is it Tipulidae? Possible for ID?
Thanks, best regards, Brigitte

Edited by brigitteu on 19-01-2011 15:50

Posted by Jason G on 19-01-2011 00:48

Ptychopteridae in my opinion, they have a unique feature in folding their wings along the false vein - see your first photograph.

Edited by Jason G on 19-01-2011 00:51

Posted by brigitteu on 19-01-2011 15:53

Thank you Jasen, as well for additional informations.
So, I'm changing titel into Ptychopteridae.
Best regards, Brigitte

Posted by brigitteu on 19-01-2011 15:59

Thank you Jasen
as well for additional informations.So, I'm changing titel into Ptychopteridae.

Camparing pics in the "web" found this page with similar fly:
http://aramel.free.fr/INSECTES15-1.shtml
Could it be Ptychoptera contaminata , a male?

Best regards, Brigitte

Posted by Jason G on 19-01-2011 16:19

P.contaminata I believe is a common one, but their identification is based on wing markings (better seen when fully-open) and male genitalia.

Comparing photos on the 'Net is good in a lot of cases as long as the material you are using is capable and reliably-named, but when checking them you need to know what the defining characters are. The wings may match, but the genitalia may not.

Try getting hold of a key relevant to your country, and see if you can get further that way :)

Edited by Jason G on 19-01-2011 16:20

Posted by xylo on 20-01-2011 11:20

Brigitte:

Hard to judge without better resolution of images, but definitely not P. contaminata: wing vein Rs is too short, cofined by a black spot and it's genitalia does not fit. Somewhere within P. lacustris-group.

so long,
xylo