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05-07-2025 12:38

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

01-06-2025 09:37

Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

06-07-2025 19:36

Castillo Joseba Castillo Joseba

me mandan el material de Galicia (España) recolec

07-07-2025 19:22

David Chapados David Chapados

Hi,Does anyone know what could this anamorph be?ht

02-07-2025 18:45

Elisabeth Stöckli

Bonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

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

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unknown pyrenomycet 2
Gernot Friebes, 29-03-2009 15:18
Hello,

here is my second pyrenomycet I found yesterday. It grew on a thin twig of a deciduous tree. Spores: 21-23 x 5,5-6,5 µm.

Best wishes,

Gernot Friebes
  • message #7266
Gernot Friebes, 29-03-2009 15:19
Re:unknown pyrenomycet 2
perithecia
  • message #7267
Gernot Friebes, 29-03-2009 15:24
Re:unknown pyrenomycet 2
spores
  • message #7268
Jacques Fournier, 29-03-2009 15:35
Jacques Fournier
Re:unknown pyrenomycet 2
Hi again,
the large allantoid spores could fit Eutypella dissepta (Diatrypaceae) but you need further data to support it.
Please make a vertical section to see how perithecia are arranged, and two slides: one in water or Congo red to see if asci are spindle-shaped and long stipitate, another in Melzer's reagent after pretreatment in 3% KOH to check the presence and reaction of apical ring.
More soon!
Jacques
Gernot Friebes, 29-03-2009 18:09
Re:unknown pyrenomycet 2
Hello Jacques,

thank you for your good tip. The asci are indeed long stipitate and don't have any reactions in Melzer's reagent.

At first a picture of the perithecia.

Best wishes,

Gernot
  • message #7277
Gernot Friebes, 29-03-2009 18:09
Re:unknown pyrenomycet 2
spores and asci
  • message #7278
Jacques Fournier, 29-03-2009 18:22
Jacques Fournier
Re:unknown pyrenomycet 2
in Eutypella dissepta the apical ring often does not react clearly with iodine. The configuration of the perithecia within the stroma fits E. dissepta. Moreover, the structure of the wood in cross section is much like that of Ulmus, the usual host of this fungus.
I think you can keep this name
Jacques