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31-05-2026 22:53

Inconnu...
éric ROMERO éric ROMERO

Bonjour tous, Je n'ai pas d'idée pour cette espÃ

30-05-2026 21:12

Lachnellula sur mélèze
Philippe PELLICIER

Sur branche de mélèze (Larix) près de la neige,

31-05-2026 10:35

Pseudoplectania on birch wood
Hulda Caroline Holte

Hello,I collected this species growing on a rather

25-05-2026 16:35

Anamorphe d'Hypomyces aurantius ? sous saule cendré (Salix cinerea)
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,J'ai trouvé récemment,

29-05-2026 15:35

Fusarium sur Robinier
daniel FERRE

Bonjour à tous,Je voudrais votre aide pour cette

28-05-2026 16:15

Literature request: Caloscypha fulgens f. caesioalba
James Mitchell

Hello,Does anyone have the original publication of

28-05-2026 11:06

Stictidaceae (?) on Typha latifolia - short-spored, I+ - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10596750

23-05-2026 11:44

Coprophilous pyrenomycete wild boar dung
Charles Grapinet Charles Grapinet

Hello, I am having trouble identifying this copro

25-05-2026 16:44

Ascomata under epidermis Carex
François Bartholomeeusen

Hi forum members,During an excursion organised by

26-05-2026 21:25

small ascomycetes on Quercus sp.
Dirk Gerstner

Hello everyone, I'm completely stumped by this li

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Bitunicate asco on bark of a leaving trunk of Fagus
Enrique Rubio, 21-03-2012 17:32
Enrique Rubio

Hi to all:
These blackish, small (up to 700 microns), gregarious, solitary, globose and semiinmersed pseudothecia  were at 2-3 m high on bark of a leaving Fagus sylvatica. They seem to be ostiolate but I'm not sure.

The spores are finally brownish or gloden brown and inconspicually 1-septate. Asci not unitunicate. Pseudoparaphyses are present.
Have you some idea ?
Many thanks again
Enrique    

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Thomas Læssøe, 21-03-2012 17:46
Re : Bitunicate asco on bark of a leaving trunk of Fagus
how about Pyrenula (lichenized)?


cheers

Thomas
Enrique Rubio, 21-03-2012 17:59
Enrique Rubio
Re : Bitunicate asco on bark of a leaving trunk of Fagus
Thank you, Thomas. I have been looking at images of Pyrenula and I believe that you are right.
Enrique
Hans-Otto Baral, 21-03-2012 18:42
Hans-Otto Baral
Re : Bitunicate asco on bark of a leaving trunk of Fagus
I have no experience with Pyrenula, but I considered that you have Navicella pileata. Torsten Richter and I investigated this species a bit, and this turned out to be quite difficult because of variation in spore size and number of cells.

Navicella is placed in Pyrenulales. Now, what about the difference to Pyrenula? A thallus only?

But now I see the spores of Enrique's fungus are much smaller than in Navicella. What is nice to see on your images is the difference of living and dead cells: roundish and with a globose drop when alive, angular and with indistnct contents when dead.

Zotto
Enrique Rubio, 21-03-2012 19:33
Enrique Rubio
Re : Bitunicate asco on bark of a leaving trunk of Fagus
Thank you again, Zotto
Enrique
Hans-Otto Baral, 21-03-2012 20:40
Hans-Otto Baral
Re : Bitunicate asco on bark of a leaving trunk of Fagus
I read that some Pyrenula species react red in KOH in the perithecium. Did you test with KOH?

Pyrenula is said to have Trentepohlia algae (with orange LBs in the cells) in their thallus. Can you find any thallus?

Zotto
Enrique Rubio, 22-03-2012 16:40
Enrique Rubio
Re : Bitunicate asco on bark of a leaving trunk of Fagus
I'm sorry, Zotto. Before could to read your message I already had shot the material