Thread subject: Diptera.info :: Unknown Beach Fly - Canacidae?

Posted by marc thibault on 27-11-2021 10:56
#1
Dear Diptera.info followers,
I would like to submit you this fly that was photographed on coastal sand dunes in the Camargue, southern France, on April 17th, 2020.
So far we don't really know in which familiy to look for, perhaps Canacidae or Helcomyzidae?
Thanks for helping :-)
Edited by marc thibault on 27-11-2021 11:01

Posted by Tony Irwin on 27-11-2021 11:04
#2
There is a well-marked transverse suture right across the thorax, so this is a calypterate fly. I would say Neolimnophora (Muscidae)

Posted by marc thibault on 27-11-2021 20:39
#3
Thank you very much for your suggestion Tony!
I'd love to know how to separate Neolimnophora virgo from N. maritima :-)

Posted by Tony Irwin on 28-11-2021 00:32
#4
I think this must be maritima, in which there are 3-4 uniform rows of presutural acrostichals. In virgo, there are 2-3 rows, with one pair stronger than the rest.

Posted by marc thibault on 28-11-2021 12:43
#5
Many thanks Tony for sorting out the ID!