Chrysis Holland: Chrysis impressa Schenck, 1856

[pietsje]

I would like to know wich spedies this is. I think the ordinary Chrysis ignitagroup but I'm nt sure because this wasp has so may teeth on the abdomen.
It concerns this siting:
http://waarneming.nl/waarneming/view/103759581
Gewone Goudwesp-complex - Chrysis ignita-gr. gezien op 2015-06-26 Kaatsheuvel - Polder Beoosten de 's-Gravenmoersche Vaart, The Netherlands
Photo's:
Info: rather large, I think >10mm

[Euchroeus]

Hi Pietsje,

even if in the second shots the specimens seems to have more teeth ...
it has only four teeth and the tip of the ovipositor right in the middle ... so it looks with more teeth on the anal margin.

I'm quite sure that this is a female of Chrysis impressa.

Cheers
Paolo

[pietsje]

Paolo, wow, impressive. It is a new species for me (and for Holland?). I'm very glad that you were able to id it for me! Unfortunately it is not known from Holland, so it seems. I'll ask if they make it possible to insert the species in the database,..

[Euchroeus]

Hi!

Yes, I think that it's a first record for The Netherlands.

However, it is not unexpected.
In fact, C. impressa is know (and somewhere even common) in the adjacent countries: Germany and Belgium, but it is also present in Denmark, England, and other countries in central Europe.
You can collect some specimens to deposit in a Museum or private collection.

Ciao!
Paolo

[pietsje]

Thank you Paolo,

Indeed, it was expected to be in Holland too. But because it's appearance is so like ignita, confusion is easily possible. We now have a possibility to insert a species as 'Chrysis ignita-group' in www.waarneming.nl and www.observado.org. But wich members it contains is unknown to most people.
Is there any information about its possible hosts?

[Euchroeus]

Yes,

recently Parn et al. (2015) suggested
Ancistrocerus claripennis, Ancistrocerus parietinus and Ancistrocerus trifasciatus as possible hosts.

You can find some additional distributional data in Paukkunen et al. 2014, whereas an illustrated key of the North European species is next to come.

You can download Parn et al. 2015 here:
http://www.eje.cz/pdfs/eje/2015/01/11.pdf

Cheers
Paolo

[pietsje]

Paolo, thanks for the information. I have Ancistrocerus in my garden but I don't know which species. They are not ease/impossible to id from pics.