Diptera.info :: Family forums :: Syrphidae
 Anasimyia contracta ?
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| Philippe moniotte |
Posted on 16-06-2008 20:35
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 Member Location: Heron, Belgium Posts: 865 Joined: 14.10.05 |
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 20:36 |
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| Cor Zonneveld |
Posted on 16-06-2008 20:54
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 Member Location: Amstelveen, the Netherlands Posts: 840 Joined: 14.10.06 |
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 |
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| Philippe moniotte |
Posted on 16-06-2008 21:01
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Member Location: Heron, Belgium Posts: 865 Joined: 14.10.05 |
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 |
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| Cor Zonneveld |
Posted on 16-06-2008 21:07
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Member Location: Amstelveen, the Netherlands Posts: 840 Joined: 14.10.06 |
Well, that is a problem with keys: you need experience to use them -> circular problem  - but then, I never use keys... 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:  [94.6Kb] Thanks for your attention Cor Zonneveld |
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| Philippe moniotte |
Posted on 16-06-2008 21:21
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Member Location: Heron, Belgium Posts: 865 Joined: 14.10.05 |
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 ?? |
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| Cor Zonneveld |
Posted on 16-06-2008 21:29
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Member Location: Amstelveen, the Netherlands Posts: 840 Joined: 14.10.06 |
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 21:31 Thanks for your attention Cor Zonneveld |
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| Cor Zonneveld |
Posted on 16-06-2008 21:30
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Member Location: Amstelveen, the Netherlands Posts: 840 Joined: 14.10.06 |
and here's what I take to be A. transfuga
Cor Zonneveld attached the following image:  [121.42Kb] Thanks for your attention Cor Zonneveld |
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| Cor Zonneveld |
Posted on 16-06-2008 21:33
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Member Location: Amstelveen, the Netherlands Posts: 840 Joined: 14.10.06 |
and here's one more transfuga, from today in Amsterdam.
Cor Zonneveld attached the following image:  [73.26Kb] Thanks for your attention Cor Zonneveld |
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| Philippe moniotte |
Posted on 16-06-2008 22:05
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Member Location: Heron, Belgium Posts: 865 Joined: 14.10.05 |
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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