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Phasia or Ectophasia : once again !
Eric Steckx	#1 Posted on 14-09-2007 21:26
Member Location: Belgium Posts: 271 Joined: 15.09.05	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 Eric Steckx attached the following image: [48.9Kb] Eric Steckx


jorgemotalmeida	#2 Posted on 14-09-2007 21:32
Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06	I'd say Ectophasia sp.


ChrisR	#3 Posted on 14-09-2007 21:47
Administrator Location: Reading, England Posts: 7699 Joined: 12.07.04	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. ChrisR attached the following image: [32.5Kb] Edited by ChrisR on 14-09-2007 22:07


Eric Steckx	#4 Posted on 14-09-2007 22:48
Member Location: Belgium Posts: 271 Joined: 15.09.05	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. Eric Steckx


ChrisR	#5 Posted on 14-09-2007 23:05
Administrator Location: Reading, England Posts: 7699 Joined: 12.07.04	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. ChrisR attached the following image: [31.06Kb]


Zeegers	#6 Posted on 15-09-2007 08:25
Member Location: Soest, NL Posts: 18528 Joined: 21.07.04	Shouldn't we start a gallery of morphology, to save these great explanations for our children ? Theo


ChrisR	#7 Posted on 15-09-2007 08:39
Administrator Location: Reading, England Posts: 7699 Joined: 12.07.04	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.


guenille	#8 Posted on 15-09-2007 15:34
Member Location: France Posts: 714 Joined: 22.06.07	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


ChrisR	#9 Posted on 15-09-2007 15:37
Administrator Location: Reading, England Posts: 7699 Joined: 12.07.04	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.