GE1206 Ichenumonini M Trøndelag, Norway

GE1206 Ichenumonini M Trøndelag, Norway

Postby Gunnar on 06 Mar 2017, 13:10

Ichneumon or not Ichneumon? That is the question.
No Ichneumon with black/dark gaster fits with Hilpert. Even if postpetiolus fits with Ichneumon it is may be another gender?
No Ichneumon with that elongate gastrocoeli + thyridiae I think, or may be some males?
No match with Coelichneumon in Perkins.
Any Cratichneumon with this striate postpetiolus?

Now I think it must be Exephanes. If Exephanes; venustus is the closest match in Hinz & Horstmann 2000
Only occupator known from Norway, venustus known from Denmark, Finland (Taxapad) and Sweden (Swedish name database).


It is 11,1 mm long, sweepnetted in Meldal, Trøndelag, Norway, 26/8-2015.
Flagellum with 38 segments, black on both sides. Tyloidae on segments 6 - 16, narrow oval, almost as long as segment lenght.
Attachments
GE1206 Ichneumon postpetiolus redusert.jpg
GE1206 Ichneumon top front redusert.jpg
GE1206 Ichneumon redusert.jpg
Last edited by Gunnar on 08 Mar 2017, 20:02, edited 10 times in total.
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Re: GE1206 Ichneumonini M Trøndelag, Norway

Postby Gunnar on 06 Mar 2017, 13:12

More pictures
Attachments
GE1206 Ichneumon scutellum redusert.jpg
GE1206 Ichneumon propodeum redusert.jpg
GE1206 Ichneumon T2 redusert.jpg
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Re: GE1206 Ichneumonini M Trøndelag, Norway

Postby Gunnar on 06 Mar 2017, 13:14

More pictures
Attachments
GE1206 Ichneumon tyloider redusert.jpg
GE1206 Ichneumon ansikt redusert.jpg
GE1206 Ichneumon gaster end redusert.jpg
Last edited by Gunnar on 08 Mar 2017, 20:03, edited 1 time in total.
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Re: GE1206 Exephanes venustus ? M Trøndelag, Norway

Postby Geir_Oersnes on 08 Mar 2017, 13:41

It's more likely Ichneumon sp. male for me. Possibly a dark form of one of the species that normally have reddish or yellow T2-3? In my experience many of the males are impossible to identify with the key in Hilpert (there are several colour forms that are not included in the key, but they could be mentioned in the descriptions part).

Edit: Maybe it's one of the Cratichneumonina? I have difficulties finding anything that could match in Hilpert (gone through some of the descriptions). Or Exephanes? Looks very similar to Exephanes occupator var. geldubensis identified by Joël Valemberg earlier (unfortunately I didn't note all the details of these specimens, don't have very detailed photos).

I would have tried to get a barcode from this specimen (there are two specimens of E. occupator in the BOLD database from my collection). In this way it's possible to check if this could be another species than E. occupator collected by myself in Bodø.
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Re: GE1206 Ichenumonini M Trøndelag, Norway

Postby Gunnar on 08 Mar 2017, 20:18

Thank you very much for your comments, Geir!
I will try to get in touch with the barcoding people in Norway next winter.

I add three more pictures.
I am not yet able to conclude using Perkins.
Sternit 4 has only a weak median longitudinal fold at the basal half.
Gastrocoeli are longer than wide, but rather deep.
Flagellar segments not subapically expanded beneath.
I find no thyridiae (as I thought at first view). The small, round spot at the base of the gastrocoeli are lighter and translucent but without any microsculpture.
Attachments
GE1206 Ichneumon S4 redusert.jpg
GE1206 Ichneumon end of gaster under redusert.jpg
GE1206 Ichneumon end of gaster fra siden redusert.jpg
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