Thread subject: Diptera.info :: Asilidae to identify in Buenos Aires

Posted by Diego Rosa on 24-01-2019 21:06
#1
Hi, I've found this creature in San Isidro, Buenos Aires. I'd like to identify it. At first sight, I thought it was a Blepharepium sp, but there are some significant differences, as the lack of a clear border in each abdominal segment

Regards

Diego A. Rosa

Posted by Eric Fisher on 30-01-2019 00:10
#2
From your photo, looks like Diogmites coffeatus; but I can't be certain, as I need more detail & angles. That sp. mimics dark vespidae and has similar coloration to this one.

Posted by Diego Rosa on 30-01-2019 14:35
#3
Thanks, Eric for your reply. Yesterday I found it again in the same areas and I could take more pictures. Hope they are good enough to see more details.

https://drive.google.com/open?id=1GTLI-Kqt_s7-7OVcZ8khcObjHljhEjbV

https://drive.google.com/open?id=1_0SdfDMCkl-qU8zs6yYyiqkHNKS3u2mb

Regards

Diego Rosa

Posted by Chris Cohen on 15-02-2019 22:43
#4
This is something from the tribe Plesiommatini. The eyes diverging ventrally are a very good character for this tribe. Compare with http://www.hr-rna.com/RNA/Rfly%20pages/Plesiomma%20page.htm

I don't think Plesiommatini has been recorded from Argentina, but Cystoprosopa semirufa was described from Montevideo, Uruguay. I'll have to look into the literature to see if I can get some more info. Great find!
Edited by Chris Cohen on 15-02-2019 22:45

Posted by Eric Fisher on 17-02-2019 21:22
#5
Yes, I now can see that this is a Plesiomma sp. I haven't been able to open the supplemental images that Diego sent (show view of face?) but after Chris mentioned this genus, the overall shape & impression now says "Plesiomma" to me also. Cystoprosopa is a closely related genus but has a 'fatter' head and shorter antennae than this fly.

Cheers, Eric

Posted by Chris Cohen on 18-02-2019 20:54
#6
Yeah, one of the additional images had a view of the face. I can't seem to attach or embed it, annoyingly.
Edited by Chris Cohen on 19-02-2019 02:44