Diptera.info :: Identification queries :: Diptera (adults)
 Muscid? Tachinid?
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| John Bratton |
Posted on 30-08-2012 15:18
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
I can't get this one to a family. Any suggestions will be appreciated. It is from brackish marsh behind a shingle ridge on the north Wales coast, October 2007. Thanks John Bratton John Bratton attached the following image:  [143.26Kb] |
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| John Bratton |
Posted on 30-08-2012 15:19
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
Dorsal view
John Bratton attached the following image:  [144.04Kb] |
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| John Bratton |
Posted on 30-08-2012 15:20
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
Head - couldn't get it in focus.
John Bratton attached the following image:  [91.98Kb] |
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| John Bratton |
Posted on 30-08-2012 15:20
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
Wing veins
John Bratton attached the following image:  [150.48Kb] |
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| nielsyese |
Posted on 30-08-2012 16:20
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 Member Location: Yerseke, NL Posts: 2384 Joined: 13.02.09 |
Tachinid
Best wishes, Niels-Jan Dek |
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| oxycera |
Posted on 30-08-2012 16:30
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Member Location: Barnsley, South Yorkshire Posts: 251 Joined: 31.12.09 |
Siphona, isn't it - or have I missed something? |
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| ChrisR |
Posted on 30-08-2012 17:56
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 Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Indeed, Siphona 
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| neprisikiski |
Posted on 30-08-2012 17:58
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Member Location: Lithuania Posts: 876 Joined: 23.02.09 |
Siphona geniculata may be a candidate.
Erikas |
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| John Bratton |
Posted on 01-09-2012 09:51
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
I couldn't see that vertical row of bristles near the rear spiracle. Forgotten the name. Meral? Anyway, I'll have another look and see where I get to with the Siphona key. Thanks, John |
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| ChrisR |
Posted on 01-09-2012 10:21
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Hypopleurals or meral bristles, yes On a Siphona they will be pretty small but if you can locate the hind spiracle, just in front of the haltere then you should see the merals. You should also then note the well-rounded subscutellum that signifies a tachinid
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| John Bratton |
Posted on 03-09-2012 14:58
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
Using the Siphona key in Anderson 1996 Fauna Ent. Scand., it sails past geniculata and keys out to urbana. But I see the 1998 British checklist retains the name geniculata for Anderson's urbana. I've got better photographs of the head. Do these confirm that it is geniculata sensu British list, please? For the record, it is from saltmarsh at Bodfan, SH435556, VC 49, 13 October 2007. (Still can't see the meral bristles.) John Bratton John Bratton attached the following image:  [96.57Kb] |
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| John Bratton |
Posted on 03-09-2012 14:59
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Member Location: Menai Bridge, North Wales, UK Posts: 670 Joined: 17.10.06 |
Palps
John Bratton attached the following image:  [47.53Kb] |
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| ChrisR |
Posted on 03-09-2012 17:23
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
You are correct - the ICZN preserved the traditional usage of geniculata and cristata after Andersen tried to revise them to urbana and geniculata. Siphona geniculata is by far the commonest Siphona in the UK so I would have little doubt that this is what you have. But with Siphona there is always room for some doubt, even with specimens sometimes
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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