The spores are about 9-13x2-3. Asci about 50-65x6-8, IKI+ and narrow (1-3) papaphyses have swollen tips.

One more photo of which I'm not very proud.

It seems a Calycellina

Miguel,

Hello,
thanks.
Maybe Calycellina leucella...

Marja

I do not know, I only have this experience, with Calycellina albida, identified by Zotto:

http://www.micobotanicajaen.com/Revista/Articulos/MARibesR/Aportaciones011/Calycellina%20albida%20011108%2098.pdf

Miguel,

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 :)

Marja

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

Zotto

Hello Zotto,

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

Here's a photo of the cells:

So it is a t. angularis. Calycellina also differs in having refractive vacuoles (VBs) in the paraphyses which yours apparently does not have.

Zotto