Diptera.info :: Identification queries :: Diptera (adults)
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 Hydrotaea meridionalis?
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| Widus |
Posted on 07-09-2020 16:27
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Member Location: Posts: 70 Joined: 12.06.10 |
Hi, Could this be the species mentioned in the title of the subject?  Christian Widmann : Suisse : Lausanne : 1010 : 07/06/2020 Altitude : 632 m - Taille : 7.7 mm (corps) Réf. : 259924 Click on the image to enlarge it. |
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| Nikita Vikhrev |
Posted on 09-09-2020 15:52
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 Member Location: Moscow, Russia Posts: 9356 Joined: 24.05.05 |
With this mosaic of tiny images I can only say: Muscidae not Hydrotaea Please, large dorsal and lateral views, one by one Nikita Vikhrev - Zool Museum of Moscow University |
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| Widus |
Posted on 15-09-2020 16:26
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Member Location: Posts: 70 Joined: 12.06.10 |
Dear Nikita, Thank you for taking a look at those images. If you click on the composite image, it should get much bigger and details can hopefully be seen better. Anyways, I will upload more images as requested. Regards, Christian |
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| Nikita Vikhrev |
Posted on 15-09-2020 19:25
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Member Location: Moscow, Russia Posts: 9356 Joined: 24.05.05 |
I tried to click, no result. I can see that radial node setulose. Is it ventral side only or both sides? Nikita Vikhrev - Zool Museum of Moscow University |
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| Widus |
Posted on 15-09-2020 20:01
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Member Location: Posts: 70 Joined: 12.06.10 |
Radial node setulose on both sides Try this link for larger images. Also two additional images added. Widus attached the following image:  [244.54Kb] Edited by Widus on 15-09-2020 20:41 |
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| Widus |
Posted on 15-09-2020 20:39
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Member Location: Posts: 70 Joined: 12.06.10 |
Side view
Widus attached the following image:  [274.43Kb] |
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| Nikita Vikhrev |
Posted on 16-09-2020 10:16
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Member Location: Moscow, Russia Posts: 9356 Joined: 24.05.05 |
"Radial node setulose on both sides" Thus, Mydaea and you have the following choise Nikita Vikhrev attached the following image:  [213.17Kb] Nikita Vikhrev - Zool Museum of Moscow University |
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| Widus |
Posted on 19-09-2020 15:34
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Member Location: Posts: 70 Joined: 12.06.10 |
Arista plumose, longest aristal hairs about width of flagellomere -> not Mydaea anicula -> not Mydaea obscurella Widus attached the following image:  [212.67Kb] Edited by Widus on 19-09-2020 15:58 |
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| Widus |
Posted on 19-09-2020 15:50
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Member Location: Posts: 70 Joined: 12.06.10 |
Prealar < posterior notopleural Fore femur without posterior seta -> not Mydaea nebulosa Widus attached the following image:  [176.4Kb] Edited by Widus on 19-09-2020 15:55 |
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| Widus |
Posted on 19-09-2020 16:07
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Member Location: Posts: 70 Joined: 12.06.10 |
I can also discard Mydaea nubila which is shorter than 7.7 mm and which also has darkened halteres So it seems it is Mydaea ancilla. The mediotergite indeed appears shiny black and not pruinose (although I could not take a convincing pictures of this structure on my specimen as the wings were hiding it). Supporting criteria include: - scutum with 4 very dark stripes - posterior crossvein oblique - prealar seta about 3/4 of posterior notopleural, although here pra is 85-91% of post nt (based on two measurements from different images) - katepisternals 1 + 2 - fore tibia without posterior seta - hind tibia with 2-3 anterodorsals and 2-3 anteroventrals Widus attached the following image:  [16.24Kb] Edited by Widus on 20-09-2020 11:53 |
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