Diptera.info :: Identification queries :: Diptera (adults)
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 Trixoscelis cf. canescens, Heleomyzidae
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| JariF |
Posted on 05-04-2009 07:00
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 Member Location: Helsinki, Finland Posts: 2072 Joined: 20.01.06 |
Hi, this is very small Heleomyzidae. Only 2mm long. Can it be one of our four Trixoscelis ? July 30.2008 Loviisa, Finland. Jari JariF attached the following image:  [71.4Kb] Edited by JariF on 05-04-2009 15:06 |
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| Nikita Vikhrev |
Posted on 05-04-2009 08:21
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 Member Location: Moscow, Russia Posts: 9229 Joined: 24.05.05 |
Trixoscelis. T.frontalis? Nikita Vikhrev - Zool Museum of Moscow University |
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| Andrzej |
Posted on 05-04-2009 11:34
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Member Location: Poland Posts: 2342 Joined: 05.01.06 |
a female of Trixoscelis cf. frontalis. It is not possible to ID from the picture to the correct species level  Andrzej Edited by Andrzej on 05-04-2009 11:35 dr. A. J. Woznica, Institute of Environmental Biology, Wroclaw University of Environmental & Life Sciences |
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| JariF |
Posted on 05-04-2009 12:23
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Member Location: Helsinki, Finland Posts: 2072 Joined: 20.01.06 |
Ok, thank You. In this case I must say "Houston, we have a problem". Only key I have for these is the old Bei-Bienko. It says, that wings should be hyaline without dark border on posterior cross weins and so they are. I says too that t1 and anterior tarsi should be yellow but in this case they are dark. T.similis is missing from the key and I don't know how it's like. There is T.canescens in the key and it should have costa much darker than other yellow veins, t1 and first segment of anterior tarsi dark and so they are. Any hints what to look ? Jari |
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| Andrzej |
Posted on 05-04-2009 13:59
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Member Location: Poland Posts: 2342 Joined: 05.01.06 |
Wroclaw here :-) Strong alcohol makes troubles :-). Maybe following characters could be found: near the dorsocentrals dark stripes present and the abdomen is in the middle dorsal part distinctly dark brown or brownish-black shining ? (=T. canescens). Costal cell could be more shadowed in the females, in the non alcohol samples or in the living species ! dr. A. J. Woznica, Institute of Environmental Biology, Wroclaw University of Environmental & Life Sciences |
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| JariF |
Posted on 05-04-2009 14:29
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Member Location: Helsinki, Finland Posts: 2072 Joined: 20.01.06 |
Here is a very bad picture from dorsal side. The fly is too small for my camera  Anyway the dark brown stripes are visible.Jari P.S. This is "non alcohol" sample 
JariF attached the following image:  [46.82Kb] |
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| Andrzej |
Posted on 05-04-2009 14:37
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Member Location: Poland Posts: 2342 Joined: 05.01.06 |
Collect, please a male specimen !. BTW there is a long simple shining stripe on dorsal abdominal part in T. canescens . I've seen a similar specimen a long time ago from Norway ! (it was also a female only ).I am not sure about the species level  Andrzej dr. A. J. Woznica, Institute of Environmental Biology, Wroclaw University of Environmental & Life Sciences |
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| JariF |
Posted on 05-04-2009 14:49
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Member Location: Helsinki, Finland Posts: 2072 Joined: 20.01.06 |
Ok, now I have a project for next summer  This was captured from a very exotic place; my garden  Last summer I had a malaise trap there for a short time and next sumer I will keep it longer. If I get any, I will post them to You for examination.Jari |
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| Andrzej |
Posted on 05-04-2009 14:55
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Member Location: Poland Posts: 2342 Joined: 05.01.06 |
thx !. At time T. cf. canescens is better to use than other species name ! Andrzej Edited by Andrzej on 05-04-2009 15:10 dr. A. J. Woznica, Institute of Environmental Biology, Wroclaw University of Environmental & Life Sciences |
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