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Diptera.info :: Family forums :: Syrphidae
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Anasimyia contracta ?
Philippe moniotte
#1 Print Post
Posted on 16-06-2008 21:35
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Location: Heron, Belgium
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Hello, List

This one keys out (Verlinden) as Anasimyia contracta (female), which would be an usual observation, I understand.
Anybody cares to comment ?
Bois de Lauzelle, Louvain la neuve, (Belgium) in a marshy area.
June 16 2008
Thanks for your help
Philippe
Philippe moniotte attached the following image:


[113.4Kb]
Edited by Philippe moniotte on 16-06-2008 21:36
 
Cor Zonneveld
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Posted on 16-06-2008 21:54
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Location: Amstelveen, the Netherlands
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Did you consider Anasimyia transfuga? It is rather similar, but has parallelsided abdomen. The thorax colorations seems to me transfuga.
Thanks for your attention
Cor Zonneveld
 
www.corzonneveld.nl
Philippe moniotte
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Posted on 16-06-2008 22:01
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Hello Cor.
Yes, it was my first conclusion, but then the abdominal segment II appears distinctly narrowed, I find. But transfuga would be more common indeed. That is the typical beginner's problem with keys : how much narrowed is "slightly narrowed" or "distinctly narrowed" when you have no reference and never seen either one??
What do YOU think ??

Philippe
 
Cor Zonneveld
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Posted on 16-06-2008 22:07
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Well, that is a problem with keys: you need experience to use them -> circular problem Grin - but then, I never use keys...Shock

Here's a photo of A. contracta - at least as I see it. 14 June in Holland. I saw A. transfuga today, too.
Cor Zonneveld attached the following image:


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Thanks for your attention
Cor Zonneveld
 
www.corzonneveld.nl
Philippe moniotte
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Posted on 16-06-2008 22:21
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Well this one would key out as a male contracta, for me. Is that right ?or am I confused ?
In that case, I'd say mine was contracta female ??
 
Cor Zonneveld
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Posted on 16-06-2008 22:29
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I'm not a Syrphid expert, so ask for other opinions too, please.

Here's another A. contracta; I feel that thorax coloration is also distinctive.
Cor Zonneveld attached the following image:


[76.33Kb]
Edited by Cor Zonneveld on 16-06-2008 22:31
Thanks for your attention
Cor Zonneveld
 
www.corzonneveld.nl
Cor Zonneveld
#7 Print Post
Posted on 16-06-2008 22:30
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and here's what I take to be A. transfuga
Cor Zonneveld attached the following image:


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Thanks for your attention
Cor Zonneveld
 
www.corzonneveld.nl
Cor Zonneveld
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Posted on 16-06-2008 22:33
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and here's one more transfuga, from today in Amsterdam.
Cor Zonneveld attached the following image:


[73.26Kb]
Thanks for your attention
Cor Zonneveld
 
www.corzonneveld.nl
Philippe moniotte
#9 Print Post
Posted on 16-06-2008 23:05
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Well that sounds convincing, and frankly I am more comfortable with a less rare (for Belgium) species ID !

Thanks for your help
Philippe
 
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