Thread subject: Diptera.info :: Muscina sp.? --> Polietes lardarius (female)
Posted by karl7 on 26-11-2025 11:19
#1
Have a nice Day. One Question please. Is this a Muscidae species, and can it be identified more precisely? The thorax is completely blackish-grey. I would be very grateful for an answer.
Location data: Austria, Lower Austria, Tattendorf, 220m, fruit and herb garden, 7.11.2025, size 8-10mm
Kind regards Karl.
Edited by karl7 on 26-11-2025 20:09
Posted by karl7 on 26-11-2025 11:19
#2
2.View
Posted by eklans on 26-11-2025 12:30
#3
Hello Karl, it's a female
Polietes lardarius - Muscina sp. have a red tip of the scutellum and naked eyes+
Posted by Juergen Peters on 26-11-2025 12:49
#4
eklans wrote:
Hello Karl, it's a female Polietes lardarius - Muscina sp. have a red tip of the scutellum and naked eyes
And at least a gentle bend in the M-vein. I had just written this a few minutes ago :) (in german):
https://insektenf...post517823
Posted by jck on 26-11-2025 16:52
#5
Eric, what features are you using to separate this from P. meridionalis?
James
Posted by karl7 on 26-11-2025 20:08
#6
Have a nice evening everyone. Thanks for the replies. Thank you Eric for identifying it as female Polietes lardarius and for the information about Muscina sp. have a red tip of the scutellum.
Kind regards Karl.
Posted by eklans on 27-11-2025 12:50
#7
Hi James, why did I choose
Polietes lardarius:
The morphological differences between
P. lardarius and
P. meridionalis for a female are not visible on dorsal images alone (anterior spiracle, anterior part of head and lower part of occiput). What helps in this matter is that
lardarius appears from V-XI while
meridionalis has a range of IV-VIII - I'm sure that November is still too late for
meridionalis even with respect to the global warming.
Posted by jck on 27-11-2025 21:28
#8
Eric, if you look at the database of Waarneming.nl, you will see that there are validated records of P. meridionalis with photos for October, November, December and even one at the beginning of January. In my own collection on Waarneming, I have 2 validated records from November, the latest being on the 22nd of that month. I quite agree that this is most probably P. lardarius but I wouldn't go farther than that.
James
Edited by jck on 27-11-2025 21:34
Posted by eklans on 28-11-2025 11:41
#9
Thanks James, I'm curious about the entries in Waarneming.nl and see it later today.
EDIT:
I've checked some of the above-mentioned
P. meridionalis in waarneming.nl: observation date doesn't seem to be a relevant criteria.
So this fly is
Polietes cf lardarius indeed.
Edited by eklans on 28-11-2025 12:49
Posted by Nikita Vikhrev on 28-11-2025 15:02
#10
I'm working on revision of Polietes. It seems that P. meridionalis is a synonym, a colour form.