Accès membres

Mot de passe perdu? S'inscrire

07-12-2025 17:43

Helvella
Malcolm Greaves Malcolm Greaves

This Helvella was in mixed woodland. Uniform cupul

08-12-2025 17:37

possibly related to Melanomma - on Abies
Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

07-12-2025 16:07

Ascomycet mit Sammelfruchtkörper.
Arnold Büschlen

Hallo, ich habe in einer Moos-Aufsammlung (epiohy

16-03-2014 22:00

Unknown species on cones
Ralph Vandiest Ralph Vandiest

Hello,I found this species a few months ago but ha

08-12-2025 13:39

Hypocrealean parasite on Nemania serpens stroma - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10572899

07-12-2025 22:43

Leucostoma ?
Andreas Millinger Andreas Millinger

Good evening, tried to determine with Munks Valsa

05-12-2025 17:33

Lachnum sur feuille de chêne
Bruno Coué Bruno Coué

Bonjour, je serais heureux de recueillir votre avi

06-12-2025 00:19

Literature search (Raitviir Galán)
Viktorie Halasu Viktorie Halasu

Hello, would anyone have this article, please? An

04-12-2025 23:53

Anthracobia key
Malcolm Greaves Malcolm Greaves

Is there an up to date Anthracobia key available?T

04-12-2025 21:30

literature search
Ethan Crenson

Hello all, I am looking for the following:  Bar

« < 1 2 3 4 5 > »
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    

  • message #17909
  • message #17909
  • message #17909
  • message #17909
  • message #17909
  • message #17909
  • message #17909
  • message #17909
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