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13-11-2022 18:16

Niek Schrier

hi everyone, I found this Xenonectriella/Pronectr

23-11-2022 19:34

Thorben Hülsewig

Hi there,i am looking for the following literature

22-11-2022 21:35

Elisabeth Stöckli

Bonsoir, Trouvé sur vieux thalles de Peltigera (

22-11-2022 21:00

Malcolm  Greaves Malcolm Greaves

I have sometimes seen the  Hypomyces papulasporae

13-11-2022 21:24

Robin Isaksson Robin Isaksson

Hi!As this one is new to Sweden i have to ask if i

12-11-2022 07:33

Alain GARDIENNET Alain GARDIENNET

Bonjour, Certains savent déjà que je m'intéres

17-11-2022 21:18

Stephen Martin Stephen Martin

I am examining a presumed fungus that produce a si

20-11-2022 19:55

Mirek Gryc

Hi Found a few days ago. I have never studied suc

20-11-2022 19:42

Mirek Gryc

HiFound a month ago on pine bark. The fruiting bod

20-11-2022 07:59

Vasileios Kaounas Vasileios Kaounas

Found in Robinia pseudoacacia. Diameter 1-2 mm.

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Xenonectriella physciacearum?
Niek Schrier, 13-11-2022 18:16
hi everyone,

I found this Xenonectriella/Pronectria like fungi grwing on Phaeophyscia orbicularis. I think it is Xenonectriella leptaleae (synonym for Pronectria leptaleae). Update: it is now called Xenonectriella physciacearum


The ascomata protrude from the thallus of the host and are appox. 250 um in diameter. young spores are transparent and smooth, 2 celled, broadly ellipsoid, slightly constricted at the septum. Mature spores are light orange/brown and have a tuberculate surface, measuring 12.5 - 14.6 x 7.3 - 9.1 um (n=9). All microscope photos are in K.


Can anyone confirm this is Xenonectriella physciacearum ?


Kind regards,
Niek Schrier

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Alain GARDIENNET, 13-11-2022 19:58
Alain GARDIENNET
Re : Xenonectriella/Pronectria leptaleae?
Hi Niek,
Now called Xenonectriella physciacearum, see attached piece.
Alain
Niek Schrier, 13-11-2022 20:21
Re : Xenonectriella physciacearum?
Thanks Alain! 
I couldnot download that paper and therefore didnot know it had a new name. I updated the name in the topic and text. It looks like it is Xenonectriella physciacearum as far as I can see for now. We did observed a violet K+ reaction btw.
Regards,
Niek
Franz Berger, 19-11-2022 23:22
Franz Berger
Re : Xenonectriella physciacearum?
Your determination isü confirmed by me, as author of  the referred  paper in Herzogia. Your specimen is a very rich the best I have seen ever.  
Best Franz
Niek Schrier, 23-11-2022 20:47
Re : Xenonectriella physciacearum?
Thank you Franz for the conformation. The specimen was hard to mis, very rich indeed.

Kind regards,
Niek