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Ectophasia oblonga?
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johnes81 |
Posted on 12-08-2017 13:51
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Member Location: Berlin, Germany Posts: 1978 Joined: 15.10.16 |
I wish to re-evaluate my understanding of Ectophasia. I have identified an Ectophasia as oblonga based upon keys of Tschorsnig. According to Tschorsnig, the longitudinal stripe should be a maximum of 1/8 of the abdomen width. The abdomen should be longer than wide. I am confused about the color. I think that the species in my photo is orange not yellow. But if you compare it to the color red, then it is more yellow. Does color really matter? I would like confirmation that the species in my photo is indeed oblonga. Otherwise, I will assume that I am misunderstanding Tschorsnig's keys or his keys are not accurate. johnes81 attached the following image: [231.73Kb] John and Nini. Naturalists not experts. |
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Piluca_Alvarez |
Posted on 12-08-2017 14:03
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Member Location: Madrid, Spain Posts: 2431 Joined: 06.11.10 |
This is one of those cases that confuse me a lot and I have found several times. A female-looking male? Look the wing-markings, they are of a female. However the abdomen is not of a typical female. I believe male-looking females do exist. What I really need is a lesson about this problem. I have never found anything about it in my literature
Edited by Piluca_Alvarez on 12-08-2017 14:03 |
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johnes81 |
Posted on 12-08-2017 14:07
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Member Location: Berlin, Germany Posts: 1978 Joined: 15.10.16 |
yes, this is a male in my opinion. I've labelled it a male. I had trouble at first but I agree that overall it is a male. Very strange one to me too. I spent an entire night reading Tschorsnigs keys to id this one. I conclude that it must be oblonga. Now I wonder if I am correct? John and Nini. Naturalists not experts. |
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Piluca_Alvarez |
Posted on 12-08-2017 14:10
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Member Location: Madrid, Spain Posts: 2431 Joined: 06.11.10 |
Simply wait for Theo I am very looking forward to what he has to say about these problem. It has been bothering me for quite a long time. |
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johnes81 |
Posted on 12-08-2017 14:16
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Member Location: Berlin, Germany Posts: 1978 Joined: 15.10.16 |
I agree. We wait for Theo. I lack the experience here. I figured this to be oblonga because of the haustellum, 1/8 longitudinal stripe, abdomen is oblong. I could be wrong. I'd love to know more about this problem. I am confused now I will wait for Theo and sip some coffee. I will look through more photos ... John and Nini. Naturalists not experts. |
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Zeegers |
Posted on 12-08-2017 15:03
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Member Location: Soest, NL Posts: 18464 Joined: 21.07.04 |
For starters, this is a female or a feminine male ... so all male features are out. I can tell the difference only by genitalia.... Theo |
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johnes81 |
Posted on 12-08-2017 15:27
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Member Location: Berlin, Germany Posts: 1978 Joined: 15.10.16 |
feminine male is interesting. Hopefully photos of genitalia have been published. I should be able to collect Ectophasia throughout August. Maybe next year I will come across another feminine male or odd female. I will definitely collect it, then dissect it. Thank You. John and Nini. Naturalists not experts. |
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johnes81 |
Posted on 12-08-2017 15:31
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Member Location: Berlin, Germany Posts: 1978 Joined: 15.10.16 |
For me, I think that genitalia is the only road to follow. Too many problems exist without genitalia. I will just assume that I need genitalia for everything. I suppose that I will learn more this way. Plus, it will give me a chance to photograph genitalia of both males and females for everything. I'm going to stop trying to id using keys. Too many problems.
John and Nini. Naturalists not experts. |
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Zeegers |
Posted on 12-08-2017 18:14
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Member Location: Soest, NL Posts: 18464 Joined: 21.07.04 |
You made a simple mistake using the key, you learn from it. Don't give up so easily ! 92 % of the Tachinidae can benidentified without genitalia. However, it cannot be learned in one week. I started 32 years ago.... Theo |
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johnes81 |
Posted on 12-08-2017 19:01
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Member Location: Berlin, Germany Posts: 1978 Joined: 15.10.16 |
Thank You, Theo. I am just angry with myself for making errors. I try hard to get it correct. In this case, I pushed myself too much for that one more photo. The species flew and I was unable to collect it. I hate it when I need a specimen and don't have one. I will move on. Next time I will examine the species through the lens to determine if I need to collect it. Otherwise, I'll key it out. 32 years? You are the Supreme Being Dipterist. I am lucky that you give me the time of day. Thank You very much for not treating me like an idiot. You are Wonderful! John and Nini. Naturalists not experts. |
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Christine Devillers |
Posted on 13-08-2017 09:01
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Member Location: Spa, Belgium Posts: 1215 Joined: 11.11.07 |
Are there features that could help to see the difference between female and male gynaecomorph of Ectophasia ? Can females of Ectophasia have large claws like those of male ? Are there no difference in the shape of the tip of abdomen ? Christine |
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