Diptera.info :: Identification queries :: Diptera (adults)
 Chetostoma curvinerve?
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| blowave |
Posted on 05-01-2009 21:12
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 Member Location: LINCOLN, UK Posts: 3151 Joined: 27.06.07 |
Hi, I saw this small fly running around on some Ivy, length around 4mm. All I can find on it is that is it not native here, but is here is places apparently. The wing markings seem to match, I have 4 pics so will put them all here. Date 19th November 2008. Lincoln UK. blowave attached the following image:  [80.31Kb] |
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| blowave |
Posted on 05-01-2009 21:14
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Member Location: LINCOLN, UK Posts: 3151 Joined: 27.06.07 |
pic 2
blowave attached the following image:  [71.64Kb] |
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| blowave |
Posted on 05-01-2009 21:15
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Member Location: LINCOLN, UK Posts: 3151 Joined: 27.06.07 |
pic 3
blowave attached the following image:  [78.65Kb] |
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| blowave |
Posted on 05-01-2009 21:16
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Member Location: LINCOLN, UK Posts: 3151 Joined: 27.06.07 |
pic 4, not very good but might be of use. Thanks, Janet
blowave attached the following image:  [75.52Kb] Edited by blowave on 05-01-2009 21:18 |
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| Tony Irwin |
Posted on 05-01-2009 21:35
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 Member Location: Norwich, England Posts: 7286 Joined: 19.11.04 |
Yes, this is Chetostoma. I hadn't realised it's not native to Britain. Can you give me a reference to this? Thanks
Tony ---------- Tony Irwin |
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| blowave |
Posted on 05-01-2009 21:59
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Member Location: LINCOLN, UK Posts: 3151 Joined: 27.06.07 |
Thanks Tony, I couldn't find the page again when I googled, but it was an English Nature document with several pages, the title at the top was to do with non-native species. I did find the name by using the 'find on this page' in edit and wondered if the entire document was to do with the heading but it was a very large heading. Unfortunately I couldn't be bothered scrolling down at the time to see if there was any other headings. I did find another on a link which I can't open as it's excel, then my computer stopped responding so closed down.  I checked the google page and couldn't find the same link! http://www.google...0&sa=N Aha, the google page I copied has remained in my copy, there is a mention of uncertainty on a link there. Now I have googled again and found the same page! http://209.85.229...p;ie=UTF-8 Janet Edited by blowave on 05-01-2009 22:01 |
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| blowave |
Posted on 05-01-2009 22:12
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Member Location: LINCOLN, UK Posts: 3151 Joined: 27.06.07 |
If you go to page 6 of the first google link I gave you will find the link titled "XLS] EN_alien_audit" with web address brc.ac.uk |
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| Tony Irwin |
Posted on 06-01-2009 01:27
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Member Location: Norwich, England Posts: 7286 Joined: 19.11.04 |
Thanks, Janet - I hadn't seen that report. Quite a bit of speculation in there!
Tony ---------- Tony Irwin |
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| Nosferatumyia |
Posted on 06-01-2009 09:25
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 Member Location: Posts: 3520 Joined: 28.12.07 |
Why do you think Chetostoma curvinerve is an invasive species in the UK? The only reason it has not been found so far could be its rareness.
Val |
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| ChrisR |
Posted on 06-01-2009 11:20
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 Super Administrator Location: Reading, England Posts: 7703 Joined: 12.07.04 |
I have recorded Chetostoma curvinerve in the past and I think at the time it had been known from about 5 UK records. If you check http://www.faunae... it is listed as British. |
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| Tony Irwin |
Posted on 06-01-2009 19:02
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Member Location: Norwich, England Posts: 7286 Joined: 19.11.04 |
Nosferatumyia wrote: Why do you think Chetostoma curvinerve is an invasive species in the UK? The only reason it has not been found so far could be its rareness. I suspect that it is the fact that at one time it was regarded as a rare species in Britain, but now seems to be much more common. A spreading invasive species would be one explanation, but it could be just more British dipterists looking for flies in the late autumn and early spring, or a response to climate change. Is there any evidence for Chetostoma being an invasive species elsewhere in its range? Tony ---------- Tony Irwin |
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| Nosferatumyia |
Posted on 07-01-2009 07:38
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Member Location: Posts: 3520 Joined: 28.12.07 |
Tony Irwin wrote: Is there any evidence for Chetostoma being an invasive species elsewhere in its range? No. Indeed, it is just because more people collected in a proper time and in proper places. Val |
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