Thread subject: Diptera.info :: [Eudasyphora cyanicolor] Blue Muscidae
Posted by Arthropa on 13-03-2007 23:21
#1
Hi,
Once again, seeking some piece of advice for some
Muscidae :
Couchey (Burgundy, France) on 28th may 2005.
This is my unique photo of this fly, but you can get real size (242 ko) by clicking on it for more details.
Is it possible to give it at least a genus name ?
Edited by Arthropa on 21-04-2007 22:46
Posted by Susan R Walter on 14-03-2007 21:19
#2
Benoit
Based on the discussion that has just gone on in Jan's thread
http://www.dipter...ad_id=5143 I'd say this has a good chance of being
Eudasyphora cyanicolor but I doubt if this photo shows enough for anyone to be sure. These metallics with dusting are obviously so tricky. It's another one with no pre-sutural ac, so maybe it is the same species as Jan's
Dasyphora and the angle is making it look bluer and darker and less dusted.
Posted by Arthropa on 15-03-2007 00:15
#3
Thanks for your answer, Susan !
Please could you explain me what "presutural ac" is ? This may appear such a trivy question, but I don't know... :|
Posted by Susan R Walter on 15-03-2007 14:25
#4
Benoit
Presutural ac is me being lazy. The expression in full is pre-sutural acrostichal setae. Setae are bristles, and acrostichal setae are those set in a double row longitudinally down the dorsal centre of the thorax (not to be confused with the dorso-central bristles, which sit to the left and right of the acrostichals). Calyptrate flies have a 'suture' or indentation which runs across the dorsal thorax from side to side - clearly visible in your photo. Pre sutural bristles sit in front of this suture ie between the suture and the head, and post sutural bristles sit behind the suture ie between the suture and the scutellum. Sometimes you will see the bristles expressed as eg 2+3 ac. This means there are 2 pre and 3 post sutural pairs of acrostichal bristles. In the case of your fly it would be 0+1 ac.
If you look at your fly and Jan's first fly in his thread, they do not appear to have any pre sutural ac, but if you go to the gallery and look at Nikita's pics of
D albofasciata and
E cyanicolor you will see that the
D albofasciata has (looks like) 2+1 ac and E cyanicolor has 0+1 ac.
Posted by Arthropa on 15-03-2007 22:07
#5
Great ! B)
Perfectly well explained, and perfectly well understood, many thanks, Susan !
