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27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

25-03-2024 03:56

B Shelbourne B Shelbourne

• Scuttelinia: Macro and habitat.• S. scutella

25-03-2024 20:21

DAVID MARCOS DAVID MARCOS

Bonjour, je m'appelle David et je débute dans l'i

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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