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14-03-2026 13:51

Thierry Blondelle Thierry Blondelle

Hi everybody Under Quercus ilex, i hesitate to na

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Hi to everybody.Can you give me any suggestions ab

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Michel Hairaud Michel Hairaud

Bonjour, Je cherche des indices  pour cette réc

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Åge Oterhals

Dear forum,I found this small discomycete on a ver

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Hulda Caroline Holte

Hello, I found and collected this species growing

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Thierry Blondelle Thierry Blondelle

Bonjour à tous,Sur 3 récoltes supposées de H. l

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Sylvie Le Goff

Bonjour à tousRécolté dans le 22 en France (ré

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David Wasilewski

These small ascomycota (1-3 mm) ere observed growi

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09-02-2026 22:01

ruiz Jose

Hola, me paso esta colección en madera de pino, t

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? Thyronectria sp.
Alex Akulov, 07-02-2023 14:52
Alex AkulovDear forum
Please help me with the identification of nectrioid fungus with muriform ascospores.

Perithecia are orange-red, cupulate when dry, grouped above the stromata of unknown sterile Pyrenomycete on the dead branches of Aesculus hyppocastanum. Yellow pigment is released after preparation in KOH. Paraphyses are absent, asci in a bundles. Asci 8-sporous, uniseriate, 129-138 ? (9,5) – 12,2 – 12,4,  with a short mostly absent stipes. Ascospores hyaline, muriform when mature, 15,6-23,5 x 5,8-7,6.

My guess is that this is something close to Thyronectria. Maybe you will have other ideas.

Grateful before,
Alex
  • message #75123
  • message #75123
Andgelo Mombert, 09-02-2023 14:43
Andgelo Mombert
Re : ? Thyronectria sp.
Dear Alex,

Yes I am also thinking of a Thyronectria. I don't see anything that matches. Possibly an undescribed species! You can send this to Hermann Voglmayr.

thank you for the info. it makes me want to look for it on the Aesculus at home.
Best wishes