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08-12-2019 11:01

Gilbert MOYNE

Bonjour, Un petit champignon que m'a remis Andgel

07-12-2019 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que hemo

07-12-2019 18:45

Laurens van der Linde Laurens van der Linde

Hallo i found the P atrovinosa with a slime specie

06-12-2019 19:49

Edvin Johannesen Edvin Johannesen

Hi! Tiny, black, oblong stromata with pure white

27-11-2019 16:54

Rasmus Riis-Hansen Rasmus Riis-Hansen

Hi,I hope you can help med with this disc found a

05-12-2019 09:06

Valencia Lopez Francisco Javier

Hola amigosEstoy buscando este trabajo de la Errot

05-12-2019 19:35

Ibai Olariaga Ibarguren

Dear colleagues, I was wondering if anyone could

19-11-2019 18:05

Lothar Krieglsteiner Lothar Krieglsteiner

... under a twig of deciduous tree (likely Quercus

29-06-2011 22:52

Luc Bailly Luc Bailly

Encore trois ascos de la réserve naturelle domani

04-12-2019 13:01

Mirek Gryc

Hello everyoneI inform you in advance that this is

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On Betula leaves
Marja Pennanen, 20-05-2010 08:42
these are about 0,3-0,7 mm wide and seems to be specific about substrate. At that damp place there were other leaves, but not these on them.
  • message #11556
Marja Pennanen, 20-05-2010 08:45
Re:On Betula leaves
The spores are about 9-13x2-3. Asci about 50-65x6-8, IKI+ and narrow (1-3) papaphyses have swollen tips.
  • message #11557
Marja Pennanen, 20-05-2010 08:59
Re:On Betula leaves
One more photo of which I'm not very proud.
  • message #11558
Miguel Ángel Ribes, 20-05-2010 09:30
Miguel Ãngel Ribes
Re:On Betula leaves
It seems a Calycellina

Marja Pennanen, 20-05-2010 10:37
Re:On Betula leaves
Maybe Calycellina leucella...

Miguel Ángel Ribes, 20-05-2010 10:57
Miguel Ãngel Ribes
Re:On Betula leaves
I do not know, I only have this experience, with Calycellina albida, identified by Zotto:

Marja Pennanen, 20-05-2010 11:19
Re:On Betula leaves
Hello Miquel,

I think, that C. leucella will do.
Actually I saw even longer spores, when I had a smaller magnification. Just could'n find them with bigger. Also asci may be longer.

I found these last spring, too and couldn't determine them. So I'm glad to get a species for them. They seem to be quite common at the region, where I found them: at my home, when I was yonger. It is my favorite place for searching fungi :)

Hans-Otto Baral, 20-05-2010 12:52
Hans-Otto Baral
Re:On Betula leaves
Hi Marja & Miguel

I am not quite sure with this identification.Could you have a look on the exterior of the excipulum? Without that you can make mistakes between families!

I was dealing today also with a species on Betula leaves, which I presently compare with Pyrenopeziza betulicola. Enrique and several others made photos of the latter, but these look macroscopically different from mine which resembles more a Naevioideae. But they could fit to yours, though being more grey. I imagine that your find belongs to P. betulicola. The margin of your apos look a bit crenulate, maybe yours are also erumpent from beneath the epidermis. Microscypha monticola is perhaps the same species or a very close relative (on Salix leaves).

Here a photo by Ingo Wagner

  • message #11564
Marja Pennanen, 20-05-2010 13:11
Re:On Betula leaves
Hello Zotto,

and so happy, that I was ;) May be I'll now become even hapier :)

Here's a photo of the cells:
  • message #11565
Hans-Otto Baral, 20-05-2010 13:48
Hans-Otto Baral
Re:On Betula leaves
So it is a t. angularis. Calycellina also differs in having refractive vacuoles (VBs) in the paraphyses which yours apparently does not have.