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Diptera.info :: Identification queries :: Diptera (adults)
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Gymnocheta viridis? Yes
Morten A Mjelde
#1 Print Post
Posted on 15-11-2021 20:50
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Gymnocheta viridis or the other one? Coastal area, Vestfold, Norway 31May.
Morten A Mjelde attached the following image:


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Edited by Morten A Mjelde on 17-11-2021 19:16
 
Morten A Mjelde
#2 Print Post
Posted on 15-11-2021 20:52
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2
Morten A Mjelde attached the following image:


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eklans
#3 Print Post
Posted on 15-11-2021 22:12
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Location: Franconia, Germany
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Hi Morton, Gymnocheta is correct (Chrysosomopsis auratus appears later and has only 3 post dc).
Greetings, Eric Kloeckner
 
Morten A Mjelde
#4 Print Post
Posted on 16-11-2021 11:56
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Thank you. I actually meant Gymnocheta magna, but presumably the pictures are not good enough for a safe determination. Smile

Morten
 
eklans
#5 Print Post
Posted on 16-11-2021 12:53
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Location: Franconia, Germany
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Hi Morten, it should be magna indeed: the green stripe on parafrontalia and the green femora are perfectly visible! And compared to my viridis the mouthedge seems to be distinctly protruding. This one seems to be very rare (and not in Norway according to fauna-eu).
EDIT: The mouthedge is not as prominent as it should: https://diptera.i...to_id=5809
Probably a female viridis...
Edited by eklans on 16-11-2021 13:54
Greetings, Eric Kloeckner
 
Morten A Mjelde
#6 Print Post
Posted on 16-11-2021 21:44
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Hi Eric
Thank you very much! Yes it is most likely viridis. I think that magna has been found in Norway. It's on Haraldeide's checklist.

Morten
 
Zeegers
#7 Print Post
Posted on 17-11-2021 08:55
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Location: Soest, NL
Posts: 18472
Joined: 21.07.04

The metallic green colour on femora is a very tricky feature, since it depends on the angle of view. Which cannot be varied on a picture Smile

There is, however, a very nice alternative for females:

hairs on tergites 3&4 are erect in viridis, adpressed in magna.

Hence viridis.


Theo
 
Morten A Mjelde
#8 Print Post
Posted on 17-11-2021 19:15
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Thank you, Theo!

Morten
 
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