Thread subject: Diptera.info :: Brachycoma devia ?
#1
Hello, I photographed this fly today (27.04.2020) in Leipzig (Germany, Saxony). Can you tell which species this is? Many thanks in advance. Best regards, Maik
Posted by
Zeegers on 28-04-2020 06:56
#2
Please upload the picture here. If for some reason the link gets ineffective ( and it will, in 10 years time !), nobody can understand what is going on.
Theo
#3
Sorry, I hope it works now.
Posted by
Sundew on 28-04-2020 20:32
#4
It is difficult to see, but in the right picture the arista seems to be hairy, that would rule out
Brachycoma and make
Sarcophaga probable.
How often did I write this
:
"If you already have a guess, then use the "forum search" function - here: keyword "Brachycoma", forum "Diptera (adults)" -, and sort "ascending" to get the older threads first. You will find lots of information and pictures! In the early times of the forum there was more discussion and the important features of the species were often pointed out. The forum archive is an invaluable source of information, it cannot be recommended too often!"
So it pays to look at
https://diptera.i...ad_id=1932 and other threads. It disburdens our few top experts who have to struggle with the questions of meanwhile 4,418 forum members (fortunately, not all are active at the same time!).
Regards, Sundew
Edited by
Sundew on 28-04-2020 20:58
Posted by
Zeegers on 29-04-2020 07:22
#5
It is very difficult to explain, but this clearly is a Sarcophaga.
The dark colou on tergites is more blueish in Brachycoma and the light more silvery and more extended. The abdomen seems flatter in Brachycoma. Keep lloking, ipwhen you find one, you will inmediately see it is different (like in Eurychaeta)
Theo
#6
Hello,
I have no idea why sundew and Theo are unable to express themselves clearly in a scientific manner:
long p, pv and v hairs on hind tibia is Sarcophaga. <- simple and scientific.
Dr. Pape is an expert of this family and i recommend reading his material.
Best wihes,
John
Posted by
Zeegers on 29-04-2020 16:53
#7
What I have learned in my study mathematics (long ago) is that a new proof of an existing (hence, already proven) theorem still might lead to new and better understanding of the theorem. Of course, both my statements of those of Johnes81 can be true at the same time (and they are !). The hairs mentioned by Johnes are useful when the species is pinned on your desk, but no way visible in the field in most cases, as well demonstrated by the left picture. I suggest the way to find it is the field is trying to use my hints (jizz of ornithologists). Jizzs are used by any field biologists, because they are so useful ! And the time scientists were ashamed to admit this, is behind us (at least: behind me).
In any case, Dr. Pape agrees with my jizz: "blackish species ... abdominal tergites silvery grey in anterior 0.5 - 0.75" [Fauna Entomologica Scandinavica 19: 93].
I hope this helps, Maik !
Theo
#8
Thank you for the help and the very interesting information!
Nice that the photo now has a name (Sarcophaga sp.).
Kind regards,
Maik
