Diptera.info :: Identification queries :: Diptera (adults)
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 Coenosia sp.?
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| Steve Nanz |
Posted on 13-02-2012 13:09
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Member Location: Posts: 3 Joined: 04.05.10 |
Photo taken 6/29/2008 in Brooklyn, NY, USA. I'm wondering if this is a Coenosia sp. specifically C. humilis. Found a similar image at BugGuide here but not sure if it's identified correctly. Thanks in advance.
Steve Nanz attached the following image:  [87.83Kb] Edited by Steve Nanz on 14-02-2012 11:28 |
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| Paul Beuk |
Posted on 13-02-2012 13:10
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 Super Administrator Location: Netherlands Posts: 19311 Joined: 11.05.04 |
Please, have another try at the attachment...
Paul - - - - Paul Beuk on https://diptera.info |
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| Steve Nanz |
Posted on 14-02-2012 11:34
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Member Location: Posts: 3 Joined: 04.05.10 |
Done. Sorry about that. Not sure but it looked like previewing undid the file selection. |
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| Stephen R |
Posted on 14-02-2012 19:02
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 Member Location: Clitheroe Lancashire UK Posts: 2396 Joined: 12.06.09 |
Yes Coenosia, but not C. humilis (which has a close-set pair of setae (av and ad) on the hind tibia, and mainly dark femora). I can't put a name to yours - it's a difficult genus which generally requires a specimen, and I'm no expert. Good luck!
Edited by Stephen R on 14-02-2012 19:11 |
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| John Carr |
Posted on 14-02-2012 20:51
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 Member Location: Massachusetts, USA Posts: 10080 Joined: 22.10.10 |
Near Neodexiopsis ovata?? |
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| Steve Nanz |
Posted on 15-02-2012 12:19
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Member Location: Posts: 3 Joined: 04.05.10 |
Thank you both. John, I submitted this at BG here. Not sure if you think it should be placed in Neodexiopsis so I put it under Coenosiinae for now. |
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| Stephen R |
Posted on 15-02-2012 13:41
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Member Location: Clitheroe Lancashire UK Posts: 2396 Joined: 12.06.09 |
I should have known not to mess with the New World! How do you separate Neodexiopsis from Coenosia? |
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| John Carr |
Posted on 15-02-2012 14:22
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Member Location: Massachusetts, USA Posts: 10080 Joined: 22.10.10 |
I don't know whether they are considered separate genera or subgenera these days. I consulted Huckett's revision from 1934. He says the typical appearance of Neodexiopsis has stripes on the thorax and spots on the abdomen, the latter similar to Ceonosia s. str. I'm not convinced either way by the bristles I see. A view of the hind leg from behind might clarify matters. A revision of the ovata group describes ovata as having darker antennae; this could be a relative. |
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| Stephen R |
Posted on 15-02-2012 14:37
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Member Location: Clitheroe Lancashire UK Posts: 2396 Joined: 12.06.09 |
Thanks John! |
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| John Carr |
Posted on 04-03-2012 04:02
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Member Location: Massachusetts, USA Posts: 10080 Joined: 22.10.10 |
Manual of Central American Diptera considers them separate genera. They diverge in the key where you count bristles on the hind femur. Neodexiopsis has three preapical bristles on top (anterodorsal to posterior range). Coenosia has two.
Edited by John Carr on 04-03-2012 04:03 |
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