15-12-2025 07:09
Danny Newman
indet. Rutstroemiaceae sp. on unk. fallen leavesMc
18-12-2025 21:17
Pol DebaenstThe identification took me to Byssonectria deformi
19-12-2025 10:10
Patrice TANCHAUDBonjour, récolte réalisée en milieu dunaire, a
18-12-2025 17:23
Bruno Coué
Bonjour,je serais heureux d'avoir votre avis sur c
18-12-2025 18:07
Margot en Geert VullingsThese plumes were found on rotten wood.They strong
17-12-2025 18:35
Michel Hairaud
Bonjour à tous/Hi to everyone I am passing along
15-12-2025 15:48
Danny Newman
Melanospora cf. lagenaria on old, rotting, fallen
15-12-2025 15:54
Johan Boonefaes
Unknown anamorph found on the ground in coastal sa
15-12-2025 21:11
Hardware Tony
Small clavate hairs, negative croziers and IKI bb
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.