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18-07-2025 23:03

Help with some conidia.
Josep Torres Josep Torres

Hello.Fruitings between 51 and 130 microns in tota

17-07-2025 11:55

Una para ID 833
Castillo Joseba Castillo Joseba

De ayer en bosque de hayas y abetos, en tieraEjemp

16-07-2025 17:34

Sphaerulina cornicola versus Septoria cornina
Bernard Declercq Bernard Declercq

Hello,I have trouble distinguishing above mention

14-07-2025 11:20

Une hélotiale sur Sphagnum palustre
Michel Hairaud Michel Hairaud

Bonjour, Voici une espèce de  (?) Hyaloscyphace

15-07-2025 13:27

literature request
Angel Pintos Angel Pintos

Hello, does anyone have access to the following ar

16-01-2023 21:31

Troposporella fumosum => Troposporella monilipes
Riet van Oosten Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

14-07-2025 17:55

Hypoxylon cf ticinense
Yanick BOULANGER

BonjourAutre dossier laissé en suspendJe viens de

14-07-2025 11:17

Jackrogersella minutella VS Hypoxylon cohaerens var. microsporum
Yanick BOULANGER

BonjourJ'ai un dossier Jackrogersella qui est rest

14-07-2025 15:52

Olla aff. millepunctata (croziers +) on Rubus idaeus
Gernot Friebes

Hi,I wanted to share this collection on Rubus idae

14-07-2025 13:37

Rutstroemia ulmariae(?) on Saxifraga rotundifolia
Gernot Friebes

Hi,do you think this collection could be R. ulmari

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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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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