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Heleomyza
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John Bratton |
Posted on 31-03-2015 16:52
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Member Location: Menai Bridge, North Wales, UK Posts: 638 Joined: 17.10.06 |
This was collected 27 March 2015 on a dead rodent in a small rocky wet heath within birch woodland, Llandegfan Common, SH577750, North Wales, UK. Can anyone confirm it as Heleomyza serrate, and not captiosa, please?
John Bratton attached the following image: [80.53Kb] |
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John Bratton |
Posted on 31-03-2015 16:52
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Member Location: Menai Bridge, North Wales, UK Posts: 638 Joined: 17.10.06 |
Here is the critical bit. Thanks, John John Bratton attached the following image: [81.08Kb] Edited by John Bratton on 31-03-2015 16:53 |
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John Bratton |
Posted on 31-03-2015 16:53
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Member Location: Menai Bridge, North Wales, UK Posts: 638 Joined: 17.10.06 |
And the habitat
John Bratton attached the following image: [165.17Kb] |
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John Bratton |
Posted on 31-03-2015 16:54
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Member Location: Menai Bridge, North Wales, UK Posts: 638 Joined: 17.10.06 |
And the best bit
John Bratton attached the following image: [127Kb] |
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oxycera |
Posted on 31-03-2015 17:07
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Member Location: Barnsley, South Yorkshire Posts: 251 Joined: 31.12.09 |
I have figures of the two (I can check the source if necessary), which strongly suggest that yours is captiosa. |
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John Bratton |
Posted on 31-03-2015 17:11
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Member Location: Menai Bridge, North Wales, UK Posts: 638 Joined: 17.10.06 |
Thanks. I was going by the figures in Gorodkov 1988. I see the British checklist suggests they may not be distinct species. |
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oxycera |
Posted on 31-03-2015 18:46
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Member Location: Barnsley, South Yorkshire Posts: 251 Joined: 31.12.09 |
I was looking at Gorodkov also. Perhaps it is more 'banana' like than 'hockey stick' like (Dr Woznica's words). That would make it serrata; hopefully he will comment on your post. See thread from 04.04.2010 if you haven't seen it. |
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Andrzej |
Posted on 01-04-2015 13:33
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Member Location: Poland Posts: 2337 Joined: 05.01.06 |
No doubt it's H. captiosa . Andrzej
dr. A. J. Woznica, Institute of Environmental Biology, Wroclaw University of Environmental & Life Sciences |
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oxycera |
Posted on 01-04-2015 19:59
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Member Location: Barnsley, South Yorkshire Posts: 251 Joined: 31.12.09 |
Excellent. |
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John Bratton |
Posted on 02-04-2015 17:18
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Member Location: Menai Bridge, North Wales, UK Posts: 638 Joined: 17.10.06 |
Thanks for that, Andrzej. But I have to say I am surprised. As well as the shape of the surstylus, the size of the epandrium looks a much better fit to Gorodkov's serrata. What leads you to captiosa? I have a photo at home that I took from Diptera.info of a captiosa surstylus, from Berlin by Ralph Sipple, which is a close fit to Gorodkov's captiosa and different from my photo. For some reason, I can no longer find that post on Diptera.info, but I can repost the photo to this thread if that is allowed. But it will have to be after Easter. John |
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empeejay |
Posted on 02-04-2015 21:53
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Member Location: Posts: 234 Joined: 15.05.06 |
The 2 threads below should clear things up. Heleomyza captiosa Heleomyza serrata However, it does seem that the British specimens in the current thread and this one, are somewhat intermediate. Edited by empeejay on 02-04-2015 22:23 |
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Andrzej |
Posted on 03-04-2015 07:50
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Member Location: Poland Posts: 2337 Joined: 05.01.06 |
Hi! realy interesting. I'm not sure about the species level of the last one mentioned here: http://www.dipter...d_id=29024. It's not excluded that the species could be a species which is described in North America. Andrzej
dr. A. J. Woznica, Institute of Environmental Biology, Wroclaw University of Environmental & Life Sciences |
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John Bratton |
Posted on 10-04-2015 16:28
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Member Location: Menai Bridge, North Wales, UK Posts: 638 Joined: 17.10.06 |
Back from Easter. The link to H. captiosa that empeejay has posted above is the thread I mentioned on 2 April. I don't know why I couldn't find it. There do seem to be three forms of surstylus here. More than two species, or one very variable one? John |
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