18-07-2025 23:03
Josep Torres
Hello.Fruitings between 51 and 130 microns in tota
16-07-2025 17:34
Bernard Declercq
Hello,I have trouble distinguishing above mention
14-07-2025 11:20
Michel Hairaud
Bonjour, Voici une espèce de (?) Hyaloscyphace
16-01-2023 21:31
Riet van Oosten
Hello, Nearby the find of Calycina claroflava on
14-07-2025 17:55
Yanick BOULANGERBonjourAutre dossier laissé en suspendJe viens de
14-07-2025 11:17
Yanick BOULANGERBonjourJ'ai un dossier Jackrogersella qui est rest
14-07-2025 15:52
Gernot FriebesHi,I wanted to share this collection on Rubus idae
14-07-2025 13:37
Gernot FriebesHi,do you think this collection could be R. ulmari
small blackish xerotolerant discomycete on branch of Quercus
Andreas Gminder,
04-05-2025 11:37
Hello,yesterday I took an attached branch of Quercus for further inspection at home to hopefully find some xerotolerant Ascos (Orbilia ....)
What I found - besides Orbilia trapeziformis - was a very small brownish-blackish ascomycetes which I don't know. I have the impression to have found it earlier already, but don't remember ....
Macroscopically reminding at Claussenomyces xylophilus or a small Durella species, very gregarious to crowded, < 1 mm in diam and only visible after rehydration.
The Textura looked like in Durella, dark brown, in KOH blackish-grey.
Unfortunately the hymenium was in all examined apothecia more or less detoratied and I could not verify the paraphyses for sure. They seemed to be cylindrical. Asci with croziers and IKI-negative.
Spores long-elliptical, appr. 8-12 x 2,5-3,2, with some small oildrops, reminding Mollisia spores
No reaction of any part of the ascocarp on KOH or Barals solution.
On still attached branch of Quercus.
Any idea?
thank you very much,
Andreas
Hans-Otto Baral,
04-05-2025 18:03
Re : small blackish xerotolerant discomycete on branch of Quercus
This looks like an overmature Durella. Without asci and paraphyses I would not say something. Are the spores mature or overmature?
Andreas Gminder,
04-05-2025 18:38
Re : small blackish xerotolerant discomycete on branch of Quercus
Hello Zotto,
I think the spores are mature, and I saw some asci with spores inside looking quite the same. The hymenium is nevertheless already quite collapsed, but I think the asci have croziers and are IKI negative.
But the spores are only one-celled and 8-12 x 2,5-3,2 µm - are there any Durella with such small spores?! In your folder there are two collections HB 5336 and HB 6363 with very similar spores ....
thank you and all the best,
Andreas
I think the spores are mature, and I saw some asci with spores inside looking quite the same. The hymenium is nevertheless already quite collapsed, but I think the asci have croziers and are IKI negative.
But the spores are only one-celled and 8-12 x 2,5-3,2 µm - are there any Durella with such small spores?! In your folder there are two collections HB 5336 and HB 6363 with very similar spores ....
thank you and all the best,
Andreas
Hans-Otto Baral,
04-05-2025 20:35
Re : small blackish xerotolerant discomycete on branch of Quercus
Durella suecica and commutata have small non-septate spores.
Did you see living asci? Otherwise it says nothing about spore maturity.
I think the excipulum and exudate are different to the two in my folder: olive-brown vs. red-brown, with different structure (porrecta vs. prismatica or oblita). I wonder if some of these with red-brown exdutae are ionomidotic.
An olive-brown porrecta is typical of Durella s.str.