Posted by Jorn R Gustad on 28-08-2016 20:42
#1
One single dorsal shot in an oak wood in Akershus, Norway (very south) 20th May 2013.
Any clue appreciated!
Edited by Jorn R Gustad on 31-08-2016 17:53
Posted by Jorn R Gustad on 30-08-2016 20:12
#5
Many thanks, Theo! I asked Knut Rognes for help, and he kindly (also) told that the necessary details was not present for identification. He was using Tschorsnig & Herting, 1994 for the purpose.
Kind regards Jørn
Posted by Zeegers on 31-08-2016 07:41
#6
Well, let's see.
What do we have ?
For starters, the anal vein very clearly does NOT reach the wing margin. Hence, it is Ceromyia, rather than Ceranthia. Moreover, Ceranthia are less grey.
Else:
The Cu-vein is bare. The R1-vein seems bare as well, but difficult to see. The R4+5 vein has only a few bristles.
The abdomen has lateral discals.
The third antennal segment is remarkably elongated and the arista is thickened on basal half or slightly more.
There is only one species with these kind of features, fasten your seatbelts;
Female Ceromyia monstrosicornis.
Date and habitat fit.
Now, this is an extremely rare species indeed and I'd loved to be able to check many other relevant features. But I am not.
I'd say the identification is 90 + or even 95 + % certain.
Up to you if you'd call it monstrosicornis or ?monstrosicornis.
And please submit to the gallery for later use, we'd probably have to wait 25 years for the next shot.
Theo
Posted by Jorn R Gustad on 31-08-2016 17:59
#7
An incredible find, but nothing without this well (and witty!) written note from Theo! I am very impressed! Btw: Knut Rognes told me that he was a bit off Tachinids these days, so he asked me to rely on Theo... I will PM you Theo, for sending you an enlarged version. I will also add a picture to the gallery, for all this kind help got on diptera.info!
Kind regards Jørn