Thread subject: Diptera.info :: unknown fly -> Helina sp.

Posted by javig on 16-02-2008 22:17
#1
Granada, Southern Spain, 1500 m. 16 February 2008

img246.imageshack.us/img246/4672/dsc9581rh3.jpg

img88.imageshack.us/img88/43/dsc9588ug7.jpg

img88.imageshack.us/img88/5219/dsc9585ty6.jpg

Thanks!
Edited by javig on 17-02-2008 00:47

Posted by jorgemotalmeida on 16-02-2008 22:29
#2
Muscidae..

Posted by Stephane Lebrun on 16-02-2008 22:45
#3
It's a female Helina. Could be Helina reversio, but impossible to be sure.

Regards.

Posted by Stephane Lebrun on 16-02-2008 23:02
#4
Hmm, I see an ad on mid tibia, so not Helina reversio. Helina sp.

Posted by javanerkelens on 16-02-2008 23:02
#5
I am a beginner....but I thought is was a Coenosia tigrina ?

Where am I wrong in my thoughts ??

Greatings Joke

Posted by javig on 16-02-2008 23:08
#6
I think Coenosia are small, this is a bit larger than Musca domestica...

Stephane, I have more photos... what characters are important?

thanks!

Posted by Stephane Lebrun on 16-02-2008 23:16
#7
Joke,
Coenosia have 1 dorsocentral before suture, 3 beyond (1+3dc). Here, 2+4.
Coenosia don't have prealar setae. Here there is one.
Coenosia have 3 katepisternal (=sternopleural) setae arranged in equilateral triangle. Here, not the case.
...Coenosia have only 1 orbital bristle, here two...
Javig, only a collected specimen could give a definite ID with this genus.

Posted by jorgemotalmeida on 16-02-2008 23:18
#8
Not Coenosia.

prealar seta is absent in ALMOST ALL Coenosinae.. Wink
and this fly has prealar seta.


Posted by jorgemotalmeida on 16-02-2008 23:19
#9
Stephane Lebrun wrote:
Joke,
Coenosia have 1 dorsocentral before suture, 3 beyond (1+3dc). Here, 2+4.
Coenosia don't have prealar setae. Here there is one.
Coenosia have 3 katepisternal (=sternopleural) setae arranged in equilateral triangle. Here, not the case.
...Coenosia have only 1 orbital bristle, here two...
Javig, only a collected specimen could give a definite ID with this genus.


and Joke... see the overview section for these terms. Pfft

Posted by javanerkelens on 16-02-2008 23:29
#10
Luckely it is Sunday tomorrow, so I can translate everythin tomorrow in Dutch hole day....GrinGrinGrin

Thanks and I wil study it !!!!

Joke

Posted by Nikita Vikhrev on 18-02-2008 09:51
#11
Stephane, I think that Helina reversio has ad on mid tibia. Why do you think it hasn't?

Posted by Stephane Lebrun on 18-02-2008 11:09
#12
In d'Asis Fonseca key, couplet 39, page 51:
...Middle tibia without an anterodorsal bristle...duplicata

Unless duplicata is not the old name for reversio in this book ?

Posted by Nikita Vikhrev on 18-02-2008 16:16
#13
Yes, Anthomyia duplicata (Meig.) = Helina duplicata = Helina reversio (Harris). And indeed, very variable species Shock