Thread subject: Diptera.info :: Neoascia pictured in Belgium on 2023-05-06
Posted by Tetrao on 01-06-2023 16:45
#1
Hello everyone !!!
I pictured this specimen in my garden on 2023-05-06 and could measure it on pictures : 6,3mm. The ratio of length to width of third antennal segment is 1.64 so largely under 2x !
Can we ID this specimen ???
I think it is a
Neoascia , perhaps
Neoascia interrupta (Meigen, 1822) , male ?
The transverse veins of the wings are spotted and I can see yellow spots on the tergites 2,3 and 4 ...
In Belgium, Four species whose wings have darkened transverse veins.
- Neoascia podagrica,
- Neoascia interrupta,
- Neoascia obliqua and
- Neoascia unifasciata.
If there are other, I would be happy to know !
Of those species only one has the third antennal segment with the ratio between length and width less than 2 : N. interrupta !
Steven Falk has album in Flickr :
N. interrupta :
https://www.flick...147899879/
N podagrica :
https://www.flick...1638744863
Not only the spots on the tergites are different, but also the colour of the third antena's segment ...
I put many pictures as I dont know which one could be the most diagnose...
Can you help me ?
Thank you for reading this post , comments or ID !!!
Have a nice day,
Didier
Edited by Tetrao on 02-06-2023 08:43
Posted by Tetrao on 05-06-2023 07:21
#2
Can anyone confirm this observation or identify this
Neoascia ?
Thank you !!!
Posted by helge on 05-06-2023 09:53
#3
Neoascia cf. podagrica
Posted by Tetrao on 05-06-2023 14:11
#4
Thank you very much Helge !
Why not
N. interrupta with such markings and such ratio for the 3D antenna’s segment ?
Posted by Tetrao on 05-06-2023 15:35
#5
On the picture below I can see a yellow spot on the tergites 4 as on the tergites 2 and 3.
Do you agree with me ?
Posted by helge on 06-06-2023 06:46
#6
Hi Tetrao,
I can only see two yellow spots (T2 & T3), the third is just a reflection of the flash light used. The third segment of the antenna looks elongated.
Helge
Posted by Tetrao on 06-06-2023 08:24
#7
I don't use a flash light and this yellow spot appear on all pictures in dorsal or profil views ! I measured the third segment of the antenna : the ratio is 1,64 ! In all keys I could find and read they say :
More then a ratio of 2 then go to ...
N. podagrica and less then 2 go to ...
N. interrupta. I measured this ratio on Steven Falk specimen : 1,48 !
Thank you very much for reading my post and commenting about your ID.
Didier
Here in the shadow !
Edited by Tetrao on 06-06-2023 08:33
Posted by helge on 06-06-2023 08:35
#8
your welcome!
Helge