Thread subject: Diptera.info :: Strange fly on dead Alnus trunk

Posted by Dmitry Gavryushin on 10-06-2006 20:45
#1
June 10, 2006.
Size around 4mm.
Very characteristic look with wings folded roof-like, snuggled to the bark like a tortoise.

Posted by Dmitry Gavryushin on 10-06-2006 20:45
#2
Here's the habitat.

Posted by Ben Hamers on 10-06-2006 20:57
#3
Hi Black,

You can find something similar here :

http://www.diptera.info/forum/viewthread.php?forum_id=5&thread_id=743#post_2661

Ben

Posted by Dmitry Gavryushin on 10-06-2006 21:12
#4
Hi Ben,
So it's a Stegana, Drosophilidae - how interesting - thanks a lot!

Posted by Dmitry Gavryushin on 13-06-2006 20:47
#5
Hello everyone,
Yesterday I've found another specimen. This time it was collected by sweeping (same time/location as in thread http://www.diptera.info/forum/viewthread.php?forum_id=2&thread_id=2043). Size 3mm. I would like to present some more images. First, a dorsal view.

Posted by Dmitry Gavryushin on 13-06-2006 20:49
#6
The left side.

Posted by Dmitry Gavryushin on 13-06-2006 20:51
#7
And the last one.
Well, I'm not so sure it's the same species: eyes are not so red, and face is rather reddish and black than pure black as it appears to me in the first fly...
Edited by Dmitry Gavryushin on 13-06-2006 20:54

Posted by Kahis on 13-06-2006 21:34
#8
Hi!

Two different species as you already noticed. The second one is Stegana (Stegana) furta, the only West Palearctic species of this subgenus. It is easily identified by the head being short & high and the eye being vertically elongated. Black palpi is also typical.

The first fly belongs to subgenus Steganina with 8 closely related species in Europe.
Edited by Kahis on 13-06-2006 21:34

Posted by Dmitry Gavryushin on 13-06-2006 21:47
#9
Thanks a lot Kahis,
It's so nice to hear I wasn't wrong about 2 different species!