Diptera.info :: Identification queries :: Diptera (adults)
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 Trichinomyia flavipes (Many thanks Paul)
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| cyprinoid |
Posted on 04-09-2009 19:09
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 Member Location: Norway Posts: 1751 Joined: 19.06.09 |
Norway, 04.09, I guess 3 mm
cyprinoid attached the following image:  [152.35Kb] Edited by cyprinoid on 07-09-2009 18:05 |
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| cyprinoid |
Posted on 04-09-2009 19:10
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Member Location: Norway Posts: 1751 Joined: 19.06.09 |
and dorsal view
cyprinoid attached the following image:  [186.77Kb] |
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| jorgemotalmeida |
Posted on 04-09-2009 19:16
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 Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
Hybotidae. Very nice.  |
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| Paul Beuk |
Posted on 04-09-2009 19:18
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 Super Administrator Location: Netherlands Posts: 19244 Joined: 11.05.04 |
Trichinomyia flavipes
Paul - - - - Paul Beuk on https://diptera.info |
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| cyprinoid |
Posted on 04-09-2009 21:02
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Member Location: Norway Posts: 1751 Joined: 19.06.09 |
Thank you, according to wikipedia only T. fuscipes is registered in Norway. How would you tell the two apart? I have pics of a different specimen with shiny wings, it might be different lighting, though. Edited by cyprinoid on 04-09-2009 21:16 |
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| Paul Beuk |
Posted on 04-09-2009 22:31
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Super Administrator Location: Netherlands Posts: 19244 Joined: 11.05.04 |
LoL, I need to check. I thought we only had one European species.
Paul - - - - Paul Beuk on https://diptera.info |
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| cyprinoid |
Posted on 05-09-2009 08:39
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Member Location: Norway Posts: 1751 Joined: 19.06.09 |
Here's a pic of the ones I see with shinier wings.. again it might be the light that day
cyprinoid attached the following image:  [162.92Kb] Edited by cyprinoid on 05-09-2009 08:42 |
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| Jan Willem |
Posted on 05-09-2009 10:08
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 Member Location: Waalwijk, The Netherlands Posts: 2126 Joined: 24.07.04 |
According to Fauna Europaea both species are known from Norway.
Jan Willem van Zuijlen |
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| cyprinoid |
Posted on 05-09-2009 18:01
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Member Location: Norway Posts: 1751 Joined: 19.06.09 |
I forgot to check there  Thanks JanBut how to tell them apart? Does anyone know? |
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| Paul Beuk |
Posted on 07-09-2009 08:25
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Super Administrator Location: Netherlands Posts: 19244 Joined: 11.05.04 |
I'll check in my handbook, when I can find the box in which I have stored it...
Paul - - - - Paul Beuk on https://diptera.info |
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| Stephen R |
Posted on 07-09-2009 09:47
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 Member Location: Clitheroe Lancashire UK Posts: 2396 Joined: 12.06.09 |
Just from the name, wouldn't fuscipes have darker legs? Or is this too naive? Stephen. |
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| cyprinoid |
Posted on 07-09-2009 11:48
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Member Location: Norway Posts: 1751 Joined: 19.06.09 |
I am now 100% sure there are 2 "types" as I have seen both side by side yesterday: type 1: (pic 1 & 2) clear wings abdomen shorter (longer wings?) than type 2. type 2: golden wings, maybe thinker antennae? Could it be sexual differences? Also I tried to compare wing venation (pic 2) with Trichinomyia flavipes here: http://www.mapress.com/zootaxa/2006f/zt01180p172.pdf, did not look right to me, but as you know I am a clod. I changed the title as the matter is not solved. |
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| Paul Beuk |
Posted on 07-09-2009 12:21
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Super Administrator Location: Netherlands Posts: 19244 Joined: 11.05.04 |
All are males, so no sexual difference. Most of the visible differences between the second and third image are due to orientation. The third image was taken slightly more from the side, resulting in a different reflection on the wings (age might also influce that, by the way) and apparently thicker antennae. All specimens are T. flavipes. Trichinomyia fuscipes indeed has darker legs and should have a brightly shining mesonotum. On these images a weak dusting is visible. It also is smaller than flavipes but thatwill not show up in the images The only 'issue' I might have with the wing as depicted in the pdf and that as shown in the images is the apparently lack of an anal vein in the printed illustration. The anal vein is weakly sclerotised and not darkened and thus will not show up very easily on photo's taken from flattened wings on microscope slides. Your images show all the structural details made visible by lighting from the side, including the fold of the anal vein. Paul - - - - Paul Beuk on https://diptera.info |
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| cyprinoid |
Posted on 07-09-2009 13:41
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Member Location: Norway Posts: 1751 Joined: 19.06.09 |
Thanks Paul. I need to say that I am 110% sure there's much more to the difference in colour than the orentation vs light, no matter which angle: they still are either brown/golden or trensparent. You mention age as a possibility, it makes sense I guess. I noticed that this one from yesterday has yellow hairs on the scutellum and is generally much lighter, is it a female? (Different positioning of the eyes?) cyprinoid attached the following image:  [114.08Kb] Edited by cyprinoid on 07-09-2009 13:50 |
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| Paul Beuk |
Posted on 07-09-2009 13:58
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Super Administrator Location: Netherlands Posts: 19244 Joined: 11.05.04 |
It is a female (eyes narrowly separated) and it appears to be relatively freshly emerged as the abdominal segments are more greyish than black, too. Thge chances are that the colours will all become darker later on and that the reflection on the wings will increase. Also note that it quite often happens that males emerge before females, so you might just be witnessing this. First pictures are males and the later ones also include females, some of which are indeed freshly emerged. Yeah, I know, too good to be true. 
Paul - - - - Paul Beuk on https://diptera.info |
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| cyprinoid |
Posted on 07-09-2009 17:49
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Member Location: Norway Posts: 1751 Joined: 19.06.09 |
Thank you for taking the trouble! |
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