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Diptera.info :: Identification queries :: Diptera (adults)
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Tephritid. Orellia distans?
Nikita Vikhrev
#1 Print Post
Posted on 14-07-2006 17:13
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Moscow region, 14 july, 5mm, on Arctolis grandis.
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Nikita Vikhrev
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Posted on 14-07-2006 17:19
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And as far as I understant it is male of same species?
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John Smit
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Posted on 17-07-2006 15:18
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Hi Nikita,

I'ld put my money on Terellia (Cerajocera) tussilaginis.

Best wishes,

John
 
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Nikita Vikhrev
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Posted on 17-07-2006 17:06
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Thank you John.
Is my Tephritidae key uncorrect? In it couplet dividing Orellia distans and Terellia tussilaginis is:
- an cell (=cup) with short tooth near A vein (not longer than bp cell (=bm)) - Orellia dicstans
- an cell (=cup) with long tooth near A vein (longer than bp cell (=bm)) - lead via Terellia tussilaginis.
I decided that tooth is short. Was I wrong?
Nikita
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Edited by Nikita Vikhrev on 17-07-2006 17:09
Nikita Vikhrev - Zool Museum of Moscow University
 
John Smit
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Posted on 18-07-2006 08:19
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Hi Nikita,

Nope your key is correct! But this is what I would call a long tooth on cell an. If you see the real O. distans, or a real Orellia, it is immidiately clear. There is however another difference between Orellia and Terellia, in Orellia there are two black spots at the sutur on the thorax, on which no(!) setae are implanted, whereas in Terellia there are no such spots at the suture.
A quick and dirty character in the field is that T. tussilaginis is very light yellow in colour, whereas O. distans is more dark, orange brown with even some grey (on abdomen or thorax, I 'm not entirely suren which).

Nevertheless it is very healthy and good to keep on being critical!

Best wishes,

John
 
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Nikita Vikhrev
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Posted on 18-07-2006 12:07
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Thank you John.
I'm not critical, I'm simply trying to understand how to ID Tephritidae in case of your absenceWink
Nikita
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John Smit
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Posted on 18-07-2006 13:29
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That's what I mean with being critical! Isn't that the key to understanding!

Cheers,

John
 
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