Hi Yannick

this is Isaria friesii,  and we had it quite recently here:
http://www.ascofrance.fr/search_forum/26541

Great is your observation that  it arises from perithecia! I was unaware of this although I have images of quite a number of collections. So I need to investigate my material on this peculiarity, perhaps the fungus is specific to certain pyrenos rather than vascular plants.

Is there any chance to identify the pyrenomycete?

This is one of my projects for the future, therefore I would be glad if you could send me the collection data to this.

Thanks
Zotto

Hi Zotto !

Thank's a lot ! This Isaria is arising from an unknown and definitivly undeterminable pyrenomycete (full of something like a mycelium). All my collection is like that.

Collection data :
Saint Germain du Teil (48340) - France - 01/02/2014 - Alt.: 800m - On Rosa dead twigs, on the ground on the side of a path.
Do you need GPS point ?

Amitiés.

Yannick

Hi to all,
Isaria is a parasitic Hypocreales. I would be surprised that Isaria is an anamorph of Disco.
 
Regards,
Christian

Yes, I know. These anamorph genera are often heterogenous. Anguillospora for instance is orbiliaceous, but the type belongs to Massarina and has another type of conidial development (rhexolytic = with separating cell that splits during secession) than the others which are schizolytic (separating at the septum). Even the latter belong also in Dothideomycetes and Leotiomycetes.

Numerous such examples exist. 

I did not yet have time to search in the literature for reports of Isaria friesii. I hope there are some besides Montagne 1836!

Brian Spooner identified the fungus, and he wrote to me in 2011: "It seems to be what has been called Isaria friesii, erumpent clusters of whitish synnemata, on dead attached dry twigs of various things, including Hedera, Buddleia, Symphoricarpos etc. Just a few collections recently which I referred to this old name but didn't follow up further (and now await the new key to synnematous genera from Keith Seifert)".

I am not aware of whether this key appeared anew.

Zotto

This key is published in "Genera of Hyphomycetes" in 2011

Dear Walter

thanks for the hint. We arrived at Arthrobotrys stilboidea, but that name does not exist. I assume the writer meant
Arthrobotrys stilbacea J.A. Mey., Bull. trimest. Soc. mycol. Fr. 74(3): 246 (1958)
and not Arthrobotryum stilboideum which has brown, up to 3-septate conidia.

If anybody has access to this literatue we would be happy.

Zotto & Evi

Here is the description of Isaria friesii. From the drawing it seems that the conidia are non-septate, and formed only terminally, both in contradiction to our fungus. No size of conidia is given. Perhaps they are smaller in Montagne's fungus.

Zotto

Hi Zotto

Attached is J.A. Meyer 1958

Good night to all

jean-Pierre

Many thanks Jean-Pierre!

From Belgish Congo, probably not our fungus :-(
though not much different

good night