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Diptera.info :: Identification queries :: Diptera (adults)
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Sapromyza albiceps / sordida
John Bratton
#1 Print Post
Posted on 11-09-2010 12:44
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Location: Menai Bridge, North Wales, UK
Posts: 650
Joined: 17.10.06

Can anyone tell me a good character for distinguishing these two species, please?

John Bratton
 
rvanderweele
#2 Print Post
Posted on 11-09-2010 13:08
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Location: Zoelmond, the Netherlands
Posts: 1984
Joined: 01.11.06

You will find the 1st dc of albiceps on the sutur or shortly behind it, for others like sordida the distance is bigger.
The male of albiceps has only 1 orbital, the others have 2.
The female albiceps has spots on the 5th and 6th abd. segment, the female of sordida has no spots on the abdomen.
Also typical for sordida is that the first femur has on the innerside near the top a dark spot .

Is this sufficient? I have the info from Papp's key. I have both species in my collection. I think both species are fairly different
ruud van der weele
rvanderweele@gmail.com
 
John Bratton
#3 Print Post
Posted on 14-09-2010 15:26
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Location: Menai Bridge, North Wales, UK
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Joined: 17.10.06

Thanks very much. I'm sure that will enable me to separate them.

John Bratton
 
Paul Beuk
#4 Print Post
Posted on 22-08-2011 16:32
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Ruud, can you check the colour of the palps in your specimens of sordida, which is now called halidayi Shatalkin, 2000 (Sapromyza sordida Haliday, 1833 is not the same as the North American Sapromyza sordida Wiedemann, 1830).
Paul

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