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Diptera.info :: Family forums :: Asilidae Forum
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unknown robberfly
Markus Gebel
#1 Print Post
Posted on 19-07-2006 11:12
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Location: Germany
Posts: 210
Joined: 18.07.06

Hello

Here I present another robberfly which is unfortunately unknown to me.Sad I photographed also this fly at the border of Poland and Germany (1.7.2006). Who can help me?

best regards
Markus
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Tony Irwin
#2 Print Post
Posted on 19-07-2006 19:04
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Location: Norwich, England
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Hi Markus
This is a female Neoitamus - the long tapering ovipositor is characteristic. I wouldn't like to say which species without seeing a specimen, even though your photo is so sharp.Wink
Tony
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Tony Irwin
 
Markus Gebel
#3 Print Post
Posted on 19-07-2006 22:57
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Location: Germany
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Hello Tony

Thank you very much.:-)
Would it be helpful if I extend single fields of the picture and show this single of the picture in a good quality here?

best regardsWink
Markus Gebel
 
http://www.digitale-naturfotos.de/
Tony Irwin
#4 Print Post
Posted on 20-07-2006 00:03
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Markus -
The bristle colour on the front and mid femora appears to rule out cothurnatus, leaving just socius and cyanurus as candidates in your area. The females of these two species are pretty well inseparable, except for the distribution of microtrichia in the first basal cell of the wing. If you have a very detailed dorsal shot, showing the wing microtrichia, we might be able to make a decision, but I don't think we can work with a lateral shot.Sad
Tony
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Tony Irwin
 
Markus Gebel
#5 Print Post
Posted on 20-07-2006 01:21
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Location: Germany
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Tony

Unfortunately I do not have any photo in wanted perspective. With a photo from another visual angle I can be helpful. I think that that does not bring us for the success.

I thank you very much for your efforts.

Best greetings
Markus
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Tony Irwin
#6 Print Post
Posted on 20-07-2006 01:40
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Another beautiful photo, but does not show what we need. Sad
If anyone has females of both socius and cyanurus, they may be able to discover more differences. Unfortunately here I only have specimens of cyanurus.
Tony
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Tony Irwin
 
Kahis
#7 Print Post
Posted on 20-07-2006 09:11
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Location: Helsinki, Finland
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I do have both. N. socius is one of the more common asilids in Finland, N. cyanurus is rather rare here.

In Finnish material these two species can normally be told apart by color color of tibiae. The tibiae of socius are reddish orange, often with large, ill-defined darker areas. N. cyanurus has bright yellow-orange tibiae with black confined to small apical band. In all specimens I've seen this character match with the microtrichia, but as it is a color character I'd be surprised if it wouldn't fail sometimes or somewhere.

Markus' fly appear to be typical N. socius.
Edited by Kahis on 20-07-2006 09:13
Kahis
 
www.iki.fi/kahanpaa
Markus Gebel
#8 Print Post
Posted on 20-07-2006 12:12
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Tony

I was very pleased with your contributions! To thanks!


Kahis

Thanks!
I understood your description. It is'nt for me so easy to understand English technical terms.
If I have understood you correctly, I showed firstly Neoitamus socius.
Now, the new, current photo shows Neoitamus cyanurus with yellowish legs. Maybe it is interesting to be able to see the differences between both species directly in a contribution. Or I lie with my opinion wrongly and interpreted the differences wrongly?

I thank You once again very much.Wink

Greetings from Duisburg/Germany
Markus
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Kahis
#9 Print Post
Posted on 20-07-2006 12:27
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Yes! You got it right. Thanks for the 2nd photo, it illustrated the difference very well.
Kahis
 
www.iki.fi/kahanpaa
Markus Gebel
#10 Print Post
Posted on 20-07-2006 12:42
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Location: Germany
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SmileSmileSmile
I'am happy!!!

Grettings
Markus
 
http://www.digitale-naturfotos.de/
Paul Beuk
#11 Print Post
Posted on 20-07-2006 13:07
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Hehe, another satisfied customer. Grin
Paul

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Markus Gebel
#12 Print Post
Posted on 20-07-2006 13:49
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@Paul:
YES... sure!Grin

best regards
Markus
 
http://www.digitale-naturfotos.de/
Juergen Peters
#13 Print Post
Posted on 21-07-2006 01:06
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Location: northwest Germany
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Hello, Markus!

I'm no Diptera specialist at all, but I enjoyed your phantastic photos!! :-))
Best regards,
Jürgen

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Juergen Peters
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