Accès membres

Mot de passe perdu? S'inscrire

01-06-2025 09:37

Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

05-07-2025 12:38

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

04-07-2025 20:12

Josep Torres Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

03-07-2025 18:40

Castillo Joseba Castillo Joseba

me mandas el material seco de Galicia (España) re

03-07-2025 20:08

Francois Guay Francois Guay

I found this interesting yellowish asco growing on

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

02-07-2025 17:26

Yanick BOULANGER

BonjourRécolté sur une brindille au fond d'un fo

« < 1 2 3 4 5 > »
Pleospora?
Stefan Blaser, 28-10-2013 09:16
Hello everybody

I hope someone can help me identifying the following species of ?Pleospora?


Substrate: A small completely decorticated branch of deciduous wood (most probably Salix sp.). The branch was found along a river bank and was probably watersoaked for a longer time period.


Macroscopic description: The small, scattered black ascomata are immersed in the host tissue and the wood is coloured vividly red in the Regions where ascomata are present. ascomata are slightly prolonged in wood direction and thus ellipsoid in side view, length about 450 µm and height and breadth about 300 µm. The small, round porus is difficult to see.


Microscopic description: Asci are usually 120-150 x 19-21 µm. Spores are yellowish brown with 5-7(-9) transversal septa. 1(-2) cells on each Spore end have no longitudinal septum. The inner spore cells are irregularly 1-2 times longitudinally septate. Spore size is fairly constant with 28-30 x 9-10 µm. Branched pseudoparaphyses of about 1 µm diameter are present.


Thank you for any help


Stefan

  • message #25588
  • message #25588
  • message #25588
Jacques Fournier, 09-11-2013 16:34
Jacques Fournier
Re : Pleospora?
Hi Stefan,
sorry I was away and I missed your post.
Such aquatic Pleosporales with dictyospores that stain the wood purple are genetically distant from true Pleospora species and they are now accommodated in the new genus Murispora (Zhang et al, 2009, Studies in Mycology 64).
I think i recognize the ascospores of your collection, they likely belong to a species that is widespread in France and most likely elsewhere in Europe as shown by your record. It is still unnamed and there are many other similar aquatic species that need to be evaluated and compared with terrestrial ones.
I would be happy to study your collection if you kept it.
Cheers,
Jacques

Jacques Fournier
Las Muros
F 09420 Rimont
Stefan Blaser, 11-11-2013 09:57
Re : Pleospora?
Hi Jacques

Thanks a lot for your reply. This is very interesting. I will send you some material I have left. Probably not in the best state.

Stefan