Diptera.info :: Identification queries :: Diptera (adults)
 Coenosia means ?
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| John Bratton |
Posted on 23-12-2023 12:09
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
Swept from Carex by Llyn y Cwn, an upland lake above Cwm Idwal, North Wales, 16 August 2023. It keys to C. means using Fonseca 1968 RES Handbook. But the cercal plate, second photo, looks more like the drawing of C. intermedia in Gregor et al. Muscidae of Central Europe.
John Bratton attached the following image:  [180.07Kb] |
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| John Bratton |
Posted on 23-12-2023 12:10
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
Cercal plate
John Bratton attached the following image:  [30.6Kb] |
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| John Bratton |
Posted on 23-12-2023 12:10
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
More genitalia
John Bratton attached the following image:  [37.85Kb] |
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| John Bratton |
Posted on 23-12-2023 18:36
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
I should have said, the specimen is in alcohol. |
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| Nikita Vikhrev |
Posted on 24-12-2023 15:17
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 Member Location: Moscow, Russia Posts: 9542 Joined: 24.05.05 |
John, I observed both intermedia and means in field. It seems to me that they are two different species. Fonseca gave only colour differences in his very good book. I agree with him that colour works reliable enough. Gregor et al gave also cercal plates, my test cerci are very similar or just the same. You have C. means.
Nikita Vikhrev attached the following image:  [118.69Kb] Nikita Vikhrev - Zool Museum of Moscow University |
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| John Bratton |
Posted on 24-12-2023 19:41
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
Many thanks for the confirmation. Best wishes John |
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