Thread subject: Diptera.info :: Phasia or Ectophasia : once again !
Posted by Eric Steckx on 14-09-2007 21:26
#1
Sorry but I keep difficulties to discriminate between Phasia and Ectophasia.
Which cell is open or closed ? Where is (or isn't) the petiole ?
Has somebody some little drawing ?
And my picture is a little blur :(
Belgium 13/09/2007
thank for your help
Posted by jorgemotalmeida on 14-09-2007 21:32
#2
I'd say Ectophasia sp.
Posted by ChrisR on 14-09-2007 21:47
#3
Ectophasia crassipennis - male :) Simply put, the wing shading is quite characteristic but the petiole is a stalk made when 2 of the major veins meet well before the wing edge. In this case vein-m meets r4+5 - see picture for an example without a petiole.
Edited by ChrisR on 14-09-2007 22:07
Posted by Eric Steckx on 14-09-2007 22:48
#4
Ok Chris, and thank you ! This is very clear.
I think the problem was in my guide : the explanations are correct but the pictures are inverted.
Posted by ChrisR on 14-09-2007 23:05
#5
Hi Eric
It never helps when they get the pictures wrong!! ;) My last pic shows a 'typical' tachinid wing, without a petiole, which you would see in
Ectophasia. But for comparisson here is a rare fly called
Rondania with a long petiole, similar to the petiole you might expect to see in a
Phasia. :)
Chris R.
Posted by Zeegers on 15-09-2007 08:25
#6
Shouldn't we start a gallery of morphology, to save these great explanations for our children ?
Theo
Posted by ChrisR on 15-09-2007 08:39
#7
Perhaps we should just expand on the glossary? More pictures there would be useful and fairly easy to do. Entries like "wing venation -calyptrata" or "wing venation - brachycera" could have accompanying photos/diagrams of wings. I noticed "petiole" (a common question with calyptrates) doesn't have a diagram. Maybe Paul can arrange this when he is back? He is welcome to use my photos here and I'd be happy to improve them is anyone has any suggestions. :)
Posted by guenille on 15-09-2007 15:34
#8
I will be very interessing to have this sort of picture.
I just begin to ID fly and I have many problem to understand the dipterist vocabulary.
To come back to wing venation of phasia have I good understand ?
Does my picture good ?
I can put it in the gallery
It is a wing of phasia hemiptera
Edith
Edited by guenille on 15-09-2007 15:35
Posted by ChrisR on 15-09-2007 15:37
#9
Looks fine to me - perfectly illustrates the petiole :)
I think it might be better if we just illustrate the "glossary" area because it would be difficult to know where morphology photos would appear in the gallery.