Diptera.info :: Identification queries :: Diptera (adults)
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 Phasia or Ectophasia : once again !
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| Eric Steckx |
Posted on 14-09-2007 21:26
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 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 |
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| jorgemotalmeida |
Posted on 14-09-2007 21:32
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 Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
I'd say Ectophasia sp. |
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| ChrisR |
Posted on 14-09-2007 21:47
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 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 |
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| Eric Steckx |
Posted on 14-09-2007 22:48
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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 |
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| ChrisR |
Posted on 14-09-2007 23:05
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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] |
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| Zeegers |
Posted on 15-09-2007 08:25
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Member Location: Soest, NL Posts: 18822 Joined: 21.07.04 |
Shouldn't we start a gallery of morphology, to save these great explanations for our children ? Theo |
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| ChrisR |
Posted on 15-09-2007 08:39
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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. |
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| guenille |
Posted on 15-09-2007 15:34
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 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 |
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| ChrisR |
Posted on 15-09-2007 15:37
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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. |
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