Posted by Sundew on 16-10-2018 00:04
#1
Hi,
On the 10th of March, 2017, I found this male sitting on the windowsill of our staircase. Utilizing the threads
https://diptera.i...d_id=38795 and
https://diptera.i...d_id=58433 as well as the keys by D'Assis Fonseca and Zimin & Elberg in Bei-Bienko I arrived at
Helina pertusa.
Posted by Sundew on 16-10-2018 00:06
#2
Did I interpret the decisive characters correctly? Many thanks for confirmation or correction; Muscidae is still a difficult field for me...
Sundew
Posted by johnes81 on 16-10-2018 09:29
#3
Hello Sundew,
I think that your determination is correct. Everything matches well with
H. pertusa. I have both male and female specimens for consultation. The arista seem to be pubescent, which also matches H. pertusa. The row of dense hairs on the hind femur is diagnostic with this species. Helina can be quite variable, so mastering this genus is very difficult. I think that Muscidae are difficult for everyone but you do well with them.
I don't know if you collect specimens but i'll attach a photo of mine which depicts the male genitalia of
H. pertusa in dorsal and lateral view.
maybe Nikita will confirm it for you if you wish to have the opinion specialist. I don't know when Stephane will return.
Best wishes,
John
Edited by johnes81 on 16-10-2018 09:29
Posted by Sundew on 17-10-2018 11:36
#4
So let us assume that Nikita's silence means consent!
The row of dense hairs on the hind femur is diagnostic with this species.
This is true for the males only - their beard is on the hind leg (strange fashion!) ;)
Thanks for supplying a pic of the genitals and the comments.
Best regards, Sundew