Thread subject: Diptera.info :: Coenosiinae No!=Phaonia fuscata
Posted by philporter on 16-11-2010 16:14
#1
A new group for me so help appreciated. Lincoln July 2010.
Hind tibia 1 ad (mid); 1 pd (apical half); 2 small anterior-ventral bristles; eyes very sparsely micro-hairy, antennae plumose, 2 pd on mid tibia; 3 thoracic dc; 2 scutellar marginals; palpus black.
Phil Porter
Edited by philporter on 16-11-2010 21:04
Posted by philporter on 16-11-2010 16:15
#2
pleural bristles confirm family?
Posted by philporter on 16-11-2010 16:16
#3
head profile
Posted by philporter on 16-11-2010 16:17
#4
Abdomen pattern
Posted by philporter on 16-11-2010 16:17
#5
thorax
Posted by Stephane Lebrun on 16-11-2010 19:58
#6
I think this specimen is very misleading : first, the 3 sternopleural (katepisternal) bristles seem to form an equilateral triangle, and there are only 3 post dc -> suggests a Coenosinae indeed. But Coenosinae haven't any pre-alar setae ; this fly has got a long one on each side. This is a Phaoniinae. Secondly, the abdomen seems to have paired spots like
Helina have. But
Helina haven't any pd on hind tibia (except
H. longicornis wich have 3 evenly strong pd). This fly is a female of
Phaonia fuscata, and the spot-like pattern on abdomen is the broad triangular marks that this species bear on tergites 2-3 (but seem divided here).
Posted by oxycera on 16-11-2010 20:48
#7
...very useful and impressive diagnosis.
Posted by philporter on 17-11-2010 10:54
#8
I can only agree with Oxycera, Stephane, or should I say Hercule Poirot!
Phil Porter