Thread subject: Diptera.info :: Small Tachinid for ID, C Spain

Posted by Piluca_Alvarez on 26-11-2011 20:03
#1

Taken in the outskirts of Madrid on the 22nd April 2011. I guess it is Phasiinae, but don't know which genus it belongs to. Thanks in advance for any help!

And sorry for the quality. Too small for a compact camera :(

Posted by Piluca_Alvarez on 26-11-2011 20:03
#2

Another view.

Posted by Piluca_Alvarez on 26-11-2011 20:04
#3

And another view.

Posted by Zeegers on 27-11-2011 10:37
#4

Looks like a Dufouria, which is very Phasiinae-like, but actually Dexiinae (you need to check the male genitalia to understand why !)


Theo

Posted by ChrisR on 27-11-2011 15:52
#5

I'd agree with Dufouria - the long, sloping parafrontal/frons is quite distinctive :) Should have 3 pairs of scutellar marginals.

Posted by Piluca_Alvarez on 27-11-2011 20:17
#6

Thank you sooo much once more, Theo and Chris!! No wonders I couldn't find it in Phasiinae but I would have never guessed it was Dexiinae! :o Learning, learning... ;)

Well, at least I see it is Dufouria clearly now |t and as usual I had to check if I could go a bit further in ID :) Only two species in Spain: chalybeata and nigrita. With so poor quality pictures not many chances but went through the keys and this enterely looks like nigrita B)

Probably not a possitive ID, but look at the bristles of the legs in this picture:

Posted by Piluca_Alvarez on 27-11-2011 20:18
#7

And look at the costal spines in this other one:

Posted by ChrisR on 27-11-2011 20:31
#8

2 ad on the mid-tibia would suggest nigrita ... was it quite small?

Edited by ChrisR on 27-11-2011 20:32

Posted by Piluca_Alvarez on 27-11-2011 20:36
#9

Yes, very small. In fact I was convinced it was a tiny Phasia (perhaps pusilla) when I took the pictures. The surprise came when I processed the pictures many months later. Venation was wrong as was the hairy abdomen.

Any difference in size between those two species?

The costal spines are clearly shorter than m-r too |t

Edited by Piluca_Alvarez on 27-11-2011 20:37

Posted by ChrisR on 27-11-2011 21:07
#10

In my experience D.nigrita is the smaller species ... about 5mm. :)

Posted by Piluca_Alvarez on 27-11-2011 22:23
#11

I would say it was closer to 8 mm. Difficult to say as it was months ago.

For you to have an idea, this is a picture of the Dufouria on a normal field daisy.