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07-12-2015 14:17

Una Peziza a latice giallo-verdastro con croziers
Zugna Marino Zugna Marino

Buon giorno a tutti, ad un primo momento, non ess

29-01-2026 10:04

Séminaire Ascos en Belgique
Jean-Paul Priou Jean-Paul Priou

Bonjour à tous, Marcel LECOMTE président de L'A

21-01-2026 16:32

Lichenicolous coelomycete
Gernot Friebes

Hi,I need your help with some black dots on a lich

17-11-2009 22:22

Peziza avec latex
Pablo Chacón Pablo Chacón

Bonne nuit, Voir si vous m'avez élaguée appor

25-11-2012 20:32

Otidea o Peziza?
Bometon Javier Bometon Javier

Ascomas cupoliformes abiertos lateralmente, himeni

25-01-2026 16:08

Geoglossum
Malcolm Greaves Malcolm Greaves

This Geoglossum had spores mostly 70-80 (87) with

27-01-2026 11:43

DNA match
Malcolm Greaves Malcolm Greaves

Is anyone with experience of DNA testing able to t

26-01-2026 11:49

Anamorph on Cytisus
Margot en Geert Vullings

We found this possible anamorph on a dead Cytisus

25-01-2026 23:23

Delitschia/Lojkania? on wood
Tomaz Vucko Tomaz Vucko

Hello! I found this species that resembles Delitsc

18-01-2026 12:24

Anamorph on an olive tree
Josep Torres Josep Torres

Hello.An anamorph located on the surface of a thin

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Psilachnum (??) on cut surface of Fagus stem
Andreas Gminder, 16-09-2015 20:18
Andreas Gminder

Hello,


another one which puzzles me.


Macroscopically I thought of an Olla species, because the apothecia were very small and more or less urceolate. But under the dissecting microscope it showed that the hairs were protruding from the excipulum, a little bit similar to Urceolella crispa.


But microscopically it was evident that the hairs are quite inconspicous. Mostly three celled, hyalin, somewhat laceolate (see foto)


Asci with croziers, IKI bb 3


Spores cylindrical, approx. 9-11 x 3-3,2 µm, without oil content.


Interestingly the excipulum contained many granules which stained amyloid in Barals solution!


Found at the cut surface of a lying Fagus stem.


thank you and best regards,


Andreas

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  • message #37974
  • message #37974
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Raúl Tena Lahoz, 17-09-2015 11:17
Raúl Tena Lahoz
Re : Psilachnum (??) on cut surface of Fagus stem
Hi Andreas
This blue-blackish reaction in IKI is often seen in Hyaloscypha. An option for your fungus is H. albohyalina. How are the paraphyses?
Best regards,
Raúl
Andreas Gminder, 17-09-2015 15:28
Andreas Gminder
Re : Psilachnum (??) on cut surface of Fagus stem

Dear Raúl,


thank you for your opinion.
I don't think that it is a Hyaloscypha species, because the hairs don't fit this genus at all, and the spores are completely without oil content. Also all these excipulum cells with a big round bubble inside I have never seen in Hyaloscypha.


best regards,
Andreas

Hans-Otto Baral, 17-09-2015 15:28
Hans-Otto Baral
Re : Psilachnum (??) on cut surface of Fagus stem
My guess goes in the direction of Psilocistella quercina (only an idea). A macro would help.
The iodine reaction I don't know.

The species was recently redescribed based partly on my species concept:

Quijada et al. 2014 Psilocistella quercina AscomyceteOrg 06-05 143-146

Zotto
Andreas Gminder, 17-09-2015 15:31
Andreas Gminder
Re : Psilachnum (??) on cut surface of Fagus stem

Dear Zotto,


thank you very much, I will look in this direction.


I don't have a macro picture because it was too small and when I came home with it it was already dreid out after a few minutes. I should have taken a foto first ....


best regards,
Andreas