GE810 Virgichneumon albosignatus M, Southern Norway

GE810 Virgichneumon albosignatus M, Southern Norway

Postby Gunnar on 14 Feb 2015, 11:42

Can someone help me with this Ichneumonini-male?
It was collected 13/7-2014, near the sea, Oslofjord, Southern Norway. It is 11,8 mm. long.
Tyloids on segments 5 - 11 of flagellum.
Attachments
GE810 Ichneumonini til Hymis propodeum redusert.jpg
GE810 Ichneumonini til Hymis T1 redusert2.jpg
GE810 Ichneumonini til Hymis ansikt redusert.jpg
GE810 Ichneumonini til Hymis redusert.jpg
Last edited by Gunnar on 06 Mar 2017, 10:40, edited 2 times in total.
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Re: GE810 Ichneumonini M

Postby Gunnar on 14 Feb 2015, 11:44

More pictures
Attachments
GE810 Ichneumonini til Hymis tyloider redusert.jpg
GE810 Ichneumonini til Hymis top front redusert2.jpg
GE810 Ichneumonini til Hymis top midt redusert.jpg
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Re: GE810 Ichneumonini M, Southern Norway

Postby Gunnar on 28 Feb 2017, 20:47

I am still stuck with this one. I tried Heresiarchini with no success today. I even tried the new Coelichneumon-key (Riedel 2012), with no match; flagellum with only 29 segments, tyloids only on segments 5 to 11 (the last very small, the rest rather broad and oval). Somewhere near Syspasis, or is it Ichneumonini?

Somebody that can help with this difficult male?
I add three more pictures.
Attachments
GE810 Coelichneumon hode top redusert.jpg
GE810 Coelichneumon T1 redusert.jpg
GE810 Coelichneumon T2 redusert.jpg
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Re: GE810 Ichneumonini M, Southern Norway

Postby Geir_Oersnes on 01 Mar 2017, 13:38

I also tried to key this one (and compare with my own material, photos on the internet...). I think it's either Virgichneumon or Cratichneumon. But there are several species that are not included in Perkin's key that can be found in Scandinavia (I do not have the descriptions of these species, take a look at Virgichneumon at artsobservasjoner.no, two species not known from Norway have been posted here, V. extremator and V. krapinensis, ID by J. Valemberg). I get to Virgichneumon monostagon in Schmiedeknechts' key, but size is too small (should be 13-15 mm for monostagon according to Perkins). None of the keys I have mention number of segments for the flagellum or anything about tyloids for V. monostagon males.

Another key that was recomended by Matthias Riedel is Rasnitsyns key from 1981 (in Russian). I don't know where to find it... (maybe it would help out with the missing species in Perkins?).
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Re: GE810 Ichneumonini M, Southern Norway

Postby Camille Thirion on 01 Mar 2017, 15:30

The form of the super-median area is that of Barichneumon s.l., the antennas those of Cratichneumon or Barichneumon s.l.

anterior tarse I detailled not possible?

other form de Vulgichneumon saturatorius??????
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Re: GE810 Ichneumonini M, Southern Norway

Postby Gunnar on 01 Mar 2017, 20:27

Thank you both for very useful comments!
I have tried the Barichneumon key in Perkins once more today. The closest I get is Virgichneumon albosignatus. But the postpetiolus is not that strongly transverse, and the size is a little to big for albosignatus also. First segment of front tarsus is not expanded apically; monostagon should not be an option.
It is a pity that Rasnitsyns key is not available as pdf.

I add three more pictures; tarsus 1, gaster end, face closeup

Propodeum and area superomedia is very close to my male Vulgichneumon saturatorius (GE150) posted here before.
I do not think that this one is Vulgichneumon. Both last tergites and antennae are completely without white. May be Virgichneumon extremator or krapensis?
Attachments
GE810 Coelichneumon ansikt redusert.jpg
GE810 Coelichneumon gaster bak fra siden redusert.jpg
GE810 Coelichneumon framtars redusert.jpg
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Re: GE810 Ichneumonini M, Southern Norway

Postby Camille Thirion on 01 Mar 2017, 21:33

View ventral leg I tarse 1 please for monostagon?
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Re: GE810 Ichneumonini M, Southern Norway

Postby Gunnar on 01 Mar 2017, 21:52

Perkins: Front tarsus with segment 1 expanded apically, externally into a sharp tooth.
I can not see that it is expanded apically on the outside (away from body). It should have been visible on both fotos (I turned it round under the microscope, and could not see any expansions).

Link to V. extremator (det. Valemberg):
https://www.artsobservasjoner.no/Image/311178

Link to V. krapinensis (det. Valemberg):
https://www.artsobservasjoner.no/Image/311182

If it is one of them it must be extremator
Attachments
GE810 Coelichneumon tars 1 underside redusert.jpg
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Re: GE810 Virgichneumon albosignatus M, Southern Norway

Postby Gunnar on 02 Mar 2017, 23:01

I have got the Russian Ichneumoninae-key (Rasnitsyn) from Andrei Humala today, and I have tried the Virgichneumon-key. The nearest I get is Virgichneumon albosignatus (which is also the nearest match in Perkins). It is also close to V. tenuicornis (found in Poland), but they can be separated on the profile of the head. In tenuicornis the head is narrower, and are not becoming more narrow in the lower parts. Quite heavy punctures on T2 and T3, with rather strong microsculpture should also indicate albosignatus.
The russian key says that albosignatus comes in two forms, with different markings of white.
I can not find any Cratichneumon that match this male.

I attach a picture of the head in profile.
Thanks to Geir Ørsnes for a great job with this one!
If I get no more comments in a few days, I will post it on the Norwegian Artsobservasjoner as Virgichneumon albosignatus.
Attachments
GE810 Coelichneumon hode fra siden redusert.jpg
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