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 Chironomid from France [Chironomus (Chironomus) cf. commutatus]
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| lweit |
Posted on 29-03-2012 21:01
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Member Location: France, DĂ©partement de la Moselle Posts: 441 Joined: 23.12.05 |
A new chironomid find near Metz and Thionville, in 29/03/2012 length : 10 mm Thank you Louis lweit attached the following image:  [71.43Kb] Edited by lweit on 01-04-2012 17:31 |
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| lweit |
Posted on 29-03-2012 21:03
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Member Location: France, DĂ©partement de la Moselle Posts: 441 Joined: 23.12.05 |
A wing
lweit attached the following image:  [34.57Kb] |
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| lweit |
Posted on 29-03-2012 21:06
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Member Location: France, DĂ©partement de la Moselle Posts: 441 Joined: 23.12.05 |
The fore legs
lweit attached the following image:  [57.29Kb] |
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| lweit |
Posted on 29-03-2012 21:07
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Member Location: France, DĂ©partement de la Moselle Posts: 441 Joined: 23.12.05 |
The pronotum
lweit attached the following image:  [85.99Kb] |
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| lweit |
Posted on 29-03-2012 21:08
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Member Location: France, DĂ©partement de la Moselle Posts: 441 Joined: 23.12.05 |
The end of the abdomen
lweit attached the following image:  [69.73Kb] |
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| John Carr |
Posted on 30-03-2012 00:25
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 Member Location: Massachusetts, USA Posts: 1454 Joined: 22.10.10 |
Chironomus (Chironomus) Do you have a dorsal shot as close as that last ventral? |
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| lweit |
Posted on 31-03-2012 16:21
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Member Location: France, DĂ©partement de la Moselle Posts: 441 Joined: 23.12.05 |
Thank you John A dorsal view lweit attached the following image:  [63.74Kb] |
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| lweit |
Posted on 31-03-2012 16:22
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Member Location: France, DĂ©partement de la Moselle Posts: 441 Joined: 23.12.05 |
A lateral view
lweit attached the following image:  [38.96Kb] |
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| John Carr |
Posted on 31-03-2012 16:57
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Member Location: Massachusetts, USA Posts: 1454 Joined: 22.10.10 |
The closest match I find in the key to British Chironomidae is Chironomus commutatus, but I'm not convinced that is your species. It is distinguished from other British Chironomus s. str. by the combination of fore tarsus without beard, color brown with pale hind margins of abdominal tergites, anal point slender and parallel-sided, and frontal tubercles large. The curved superior volsella and gonostylus expanded basally are consistent. All six characters are, individually, common in the genus and I do not have a description of the species or a guide to French species. Apparently this is a species of large lakes, while you are near large rivers. So I'll say Chironomus (Chironomus) cf. commutatus Keyl. The group was revised in 1973. I have not seen the paper. Wülker, W., and A.M. Klötzli. 1973. Revision der Gattung Chironomus Meig. IV. Arten des lacunarius (commutatus-) Komplexes.- Arch. Hydrobiol.72: 474-489 |
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| lweit |
Posted on 31-03-2012 21:56
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Member Location: France, DĂ©partement de la Moselle Posts: 441 Joined: 23.12.05 |
Thank you John There is a river near the place i've caught this fly ? Louis |
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| John Carr |
Posted on 31-03-2012 23:09
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Member Location: Massachusetts, USA Posts: 1454 Joined: 22.10.10 |
The cities you named are along the Moselle River so I assumed the fly came from there. I see no large lakes nearby on the map. The species may be more diverse in habitat than suggested by my quick search, or it could be a similar species that lives in smaller water bodies. |
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| lweit |
Posted on 01-04-2012 18:40
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Member Location: France, DĂ©partement de la Moselle Posts: 441 Joined: 23.12.05 |
You're right John. Thank you for your answer Louis |
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http://www.luomus.
...what you prefer, we can discus this, during some good wine, cheese and many new pinned flies!