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24-12-2025 18:12

Orbilia
Ethan Crenson

Hello all, A friend found this Orbilia growing on

24-12-2025 17:08

Propolis sp. on Picea abies
Hulda Caroline Holte

Hello, I have found this propoloid ascomycete on

23-12-2025 11:27

blanc poilu
Louis DENY

bonjour forum,sur débris de bois de feuillu (acer

20-12-2025 10:49

Small resin asco?
Mirek Gryc

Hi. „I doubt it is possible to identify this ti

23-12-2025 08:27

Hymenoscyphus?
Josep Torres Josep Torres

Hello.Small, yellowish ascomata, with very short a

21-12-2025 09:32

Spherical Pyrenomycete
Josep Torres Josep Torres

Hello.A tiny ascomycete found embedded in wood in

21-12-2025 21:32

Anamorf on decaying leaves of Euonymus japonicus 'Microphyllus'
Pol Debaenst

Hello, Garden, Burgweg 19, Veurne, BelgiumOn 10/1

22-12-2025 23:38

Phylloscypha labessiana ?
Patrice TANCHAUD

Bonsoir, récolte sur un mur en pierre, apothéci

21-12-2025 12:34

Nectria ??
Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

22-12-2025 00:47

Phylloscypha boltonii
Patrice TANCHAUD

Bonsoir, récolte à proximité du milieu dunaire

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Pyrenopeziza-like fungus on aspen
Kosonen Timo, 18-06-2021 23:08
Kosonen Timo
Hello,

Any ideas on this one? Spores ca. 14 x 3, with (0)1-3 septa. Asci with croziers and with prominent plug in Lugol's. Excipulum of elongated thick-walled cells. Hairs dark-coloured / brown with warts, but hyaline / smooth towards the apex, thick-walled. Sorry, no scale. On dead wood of Populus tremula.

bw
Timo
  • message #69226
  • message #69226
  • message #69226
  • message #69226
Hans-Otto Baral, 19-06-2021 15:56
Hans-Otto Baral
Re : Pyrenopeziza-like fungus on aspen
Hi Timo

what is the size of the hairs? Ascus reaction is blue? Calycina-like?

Spores are septate already inside the living asci? Apos 0.3 mm diam.?

I have no idea.

Zotto
Hardware Tony, 19-06-2021 21:19
Hardware Tony
Re : Pyrenopeziza-like fungus on aspen
Arachnopeziza seems to get close especially with 1-3 sepate ascospores and size, hairs can be smooth at tips but are long? IKI+?  Just a suggestion.
Kosonen Timo, 20-06-2021 21:38
Kosonen Timo
Re : Pyrenopeziza-like fungus on aspen
Hi,

..on the road, several weeks of field work this year, i'll get back with measurements & better photos later next week. --Spores alone might fit Arachnopeziza yes, but otherwise not looking at Arachno at all, starting from the textura oblita. Spores mainly aseptate in the asci. Hairs maybe c. 5-7 um wide.

The apos sit tight in the substrate. I tried to pick one to make a slide and it resulted in the hymenium (+ medullary excipulum?) squeezing out of the apo like a bursting pimple... the point being that the dark-pigmented flanks - outer excipulum - forms a tight package acting almost like a separate covering structure.

Timo
Hans-Otto Baral, 20-06-2021 21:52
Hans-Otto Baral
Re : Pyrenopeziza-like fungus on aspen
5-7 µm wide hairs! This would mean they attain 100 µm in length. It looks a bit like a Fuscolachnum.