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26-05-2026 22:44

Incrucipulum capitatum ?
Ethan Crenson

Hi all, I think I have Incrucipulum capitatum her

26-05-2026 21:25

small ascomycetes on Quercus sp.
Dirk Gerstner

Hello everyone, I'm completely stumped by this li

22-05-2026 14:44

minute Saccobolus from cow-dung (moist chamber from Portugal)
Lothar Krieglsteiner Lothar Krieglsteiner

in unripe condition citrine yellow, then soon fadi

25-05-2026 16:44

Ascomata under epidermis Carex
François Bartholomeeusen

Hi forum members,During an excursion organised by

23-05-2026 11:44

Coprophilous pyrenomycete wild boar dung
Charles Grapinet Charles Grapinet

Hello, I am having trouble identifying this copro

25-05-2026 16:35

Anamorphe d'Hypomyces aurantius ? sous saule cendré (Salix cinerea)
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,J'ai trouvé récemment,

22-05-2026 13:29

Pseudophacidium ?necans on Vaccinium myrtillus
Gernot Friebes

Hi,I am curious to hear your opinion on this mater

23-05-2026 18:57

Mollisia scopiformis
Sylvie Le Goff

Bonjour à tousRécolté sur une branchette de Sal

23-05-2026 23:53

cf Godronia sp.
Moreno Miriam

Bonjour ! Je travaille sur mon mémoire de master

22-05-2026 21:35

A yellow synnemata (coremia) on wood
Steve Clements

Bonjour, I expected this find on old wood on our

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Small hairy discs on Castanea
Marc Detollenaere, 31-01-2026 09:17
Marc DetollenaereDear Forum,

On decorticated wood of Castanea,I found some small hairy grey discs.
Asci measured 42x6µ, the spores were hyaline 6x2µ and contained a small guttule at both sides. Hairs were also hyaline, smooth,cylindric, septate and measured 55-60µ. 
Any ideas?

Marc
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Kosonen Timo, 31-01-2026 11:30
Kosonen Timo
Re : Small hairy discs on Castanea
looks like O. transiens. Check for dextrinoid hair apex.

Timo
Marc Detollenaere, 31-01-2026 17:04
Marc Detollenaere
Re : Small hairy discs on Castanea
Hi Timo,

Using IKI no dextrinoid reaction of the hairs was seen. Asci had an amyloid pore.

Marc
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Kosonen Timo, 31-01-2026 17:23
Kosonen Timo
Re : Small hairy discs on Castanea
ok. Well, with that ecology & spore size & multiseptate hairs ...Sorry, I dont have good suggestions. Another "Hyaloscyphaceae"... Possible genera are Mimicoscypha, Olla (still), Resinoscypha and Psilocistella or something in between. But the small(ish) spores lead me to think of transiens. Looks like there are no dextrinoid reactions anywhere else either (excipulum), sometimes amyloid "nodules" somewhere. Also worth checking: does anything stain strongly blue with cotton blue.

cheers
Timo
Marc Detollenaere, 01-02-2026 09:31
Marc Detollenaere
Re : Small hairy discs on Castanea
Could Psilocistella quercina be a match?
Kosonen Timo, 01-02-2026 11:05
Kosonen Timo
Re : Small hairy discs on Castanea
A very good suggestion!
t