Diptera.info

Posted by Piluca_Alvarez on 06-04-2012 23:04

Taken in a garden in the outskirts of Madrid on the 17th March 2012. Thanks in advance for any help :)

Edited by Piluca_Alvarez on 21-04-2012 12:04

Posted by javanerkelens on 07-04-2012 19:36

Hmm.....On the last photo the prealar seems missing and i don't see the row of av/pv on t3 and we see 2 strong posterior setae on t1
So i have doubt about D. platura....

Posted by Stephen R on 08-04-2012 11:38

Good points, though I did think the pvs on t3 might be hidden from these angles. But I can't easily reconcile what I can see with any of the other candidates with a fore-tibial spur. Can we agree on 'Delia sp.'?

Posted by javanerkelens on 08-04-2012 12:03

I agree with you that the pv on t3 often are not visible on photos.
And there are indeed not many other candidates with a fore tibial spur that could fit to this fly.
The only candidate I could think of is D. antiqua
For now Delia species seems right, but maybe Piluca has some more photos with a better view on the hindtibia.

Edited by javanerkelens on 08-04-2012 12:04

Posted by Stephen R on 08-04-2012 12:59

D. antiqua does look possible - if there is a pre-alar after all ;) So hard from photos!

Posted by Piluca_Alvarez on 12-04-2012 20:40

Sorry for the late reply and THANKS A LOT to you both for your input, Joke and Stephen!! |t

I am adding a couple of pictures where the chaetotaxy can be seen better.

Do you mean prealar bristles? I am going to look if there is any picture showing this better.

Posted by javanerkelens on 12-04-2012 21:47

#11

I think Delia is right, with a possibility it could be D. antiqua, I don't dare to go futher....

I added a photo to show the prealar seta..

Posted by Piluca_Alvarez on 12-04-2012 22:17

#12

Thanks once more, Joke!! Now I know exactly what I need to look for in my pictures. Hope to find something clearer |t

Posted by Piluca_Alvarez on 19-04-2012 20:32

#13

Well, again too late ;) but here is finally a shot of the lateral bristles on thorax. Sorry quality isn't the best, but there isn't anything better :S :S Hope it helps ;)

Posted by Stephen R on 19-04-2012 20:56

#14

I agree with Joke that all we can say is that the lack of a strong pre-alar rules out D. platura. D. antiqua may be possible (it has a weaker pre-alar), but we'd need better evidence to go beyond 'Delia sp.'

Posted by Piluca_Alvarez on 21-04-2012 12:00

#15

Thanks a lot again, Stephen! I cannot provide better evidence so I know now that definitely all we can say is Delia sp.. Good enough for me! |t

Many thanks to you both for your input and interest!! :)