Thread subject: Diptera.info :: Chalcosyrphus nemorum

Posted by Reimund Ley on 22-07-2022 12:28
#1

this fly was about 7-10mm,
found in Germany, Baden-W├╝rttemberg, Radolfzell, altitude 390m, 8. 6. 2022


best wishes


Angelika/Reimund

Edited by Reimund Ley on 27-07-2022 12:16

Posted by Reimund Ley on 22-07-2022 12:28
#2

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Posted by Reimund Ley on 22-07-2022 12:29
#3

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Posted by Sundew on 26-07-2022 22:09
#4

This is a bit tricky! To discriminate between C. nemorum and Xylota abiens, we need to see the abdomen (segments wider than long in C. nemorum), but here it is hidden under the wings. Then, the shape of the hind femora is important. In C. nemorum they are expanded towards the apex but then narrowed at the outermost tip, whereas in X. abiens the hind femora are not expanded and their underside is rather evenly curved (see https://www.flick...8435796193). The left hind femur in the lowermost picture tends to show the C. nemorum type, that's why I lean towards this species.
Regards, Sundew

Posted by Reimund Ley on 27-07-2022 12:16
#5

Hello Claudia,


thanks to you for your answer and explanation.
We see the different and sorry, there are no more pictures.

We will call this fly Chalcosyrphus nemorum and hope it is OK.


greetings


Angelika/Reimund