Diptera.info :: Identification queries :: Diptera (adults)
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 Thailand Muscidae ID -> Hydrotaea chalcogaster
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| smol |
Posted on 09-09-2024 09:21
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Member Location: Posts: 328 Joined: 06.07.22 |
23 Jul 2024, Thailand (Koh Samui) Observation: https://observation.org/observation/327574968/    
Edited by smol on 09-09-2024 22:48 |
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| John Carr |
Posted on 09-09-2024 11:46
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 Member Location: Massachusetts, USA Posts: 10062 Joined: 22.10.10 |
Muscidae. Hydrotaea capensis? |
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| smol |
Posted on 09-09-2024 12:29
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Member Location: Posts: 328 Joined: 06.07.22 |
John Carr wrote: Muscidae. Hydrotaea capensis? Thank you very much! |
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| Nikita Vikhrev |
Posted on 09-09-2024 15:17
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 Member Location: Moscow, Russia Posts: 9303 Joined: 24.05.05 |
John, I agree that it is Hydrotaea (Ophyra). But I don't think it is capensis. It seems to me that eyes are not emarginated on hind margin. Most probable H. chalcogaster.
Nikita Vikhrev attached the following image:  [77.62Kb] Nikita Vikhrev - Zool Museum of Moscow University |
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| John Carr |
Posted on 09-09-2024 15:27
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Member Location: Massachusetts, USA Posts: 10062 Joined: 22.10.10 |
Nikita Vikhrev wrote: John, I agree that it is Hydrotaea (Ophyra). But I don't think it is capensis. It seems to me that eyes are not emarginated on hind margin. Most probable H. chalcogaster. Is there a modern review of this group? I checked Sabrosky (1949). He says the male of O. chalcogaster has partially yellow fore tarsi and the female has partially yellow arista. |
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| Nikita Vikhrev |
Posted on 09-09-2024 17:14
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Member Location: Moscow, Russia Posts: 9303 Joined: 24.05.05 |
I use Fauna of India, Emden 1965. Yes, absence of emargination against invisible orange on arista. 1. I suppose emargination more reliable. 2. In female yellowish arista is not easy visible, especially on photo. 3. I personally spent a lot of time in Thailand. H. capensis isn't reported for Thailand. Especially on southern Koh Samui. In S thailand only H. spinigera and H. chalcogaster are present. Nikita Vikhrev - Zool Museum of Moscow University |
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| smol |
Posted on 09-09-2024 20:37
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Member Location: Posts: 328 Joined: 06.07.22 |
Thank you very much John and Nikita! For what it is worth, a zoomed in picture of the head based on the raw file:  Interestingly enough, I can see the yellowish arista basally and only dorsally. I have checked multiple dorsal pictures, and they all show this basal yellowish (towards orange) color. Though, the sun reflection still makes it very hard. |
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| Nikita Vikhrev |
Posted on 09-09-2024 21:58
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Member Location: Moscow, Russia Posts: 9303 Joined: 24.05.05 |
Well, as you know I'm expert. My decision is H. (chalcogaster with very small "?"
Nikita Vikhrev - Zool Museum of Moscow University |
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| smol |
Posted on 09-09-2024 22:48
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Member Location: Posts: 328 Joined: 06.07.22 |
Nikita Vikhrev wrote: Well, as you know I'm expert. My decision is H. (chalcogaster with very small "?" Much appreciated! Very happy with this name 
Edited by smol on 09-09-2024 22:49 |
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