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22-02-2024 11:05

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous me confirm

21-02-2024 16:22

Laurent Bonneau Laurent Bonneau

petites apothécies blanchâtre Spores verruqueus

20-02-2024 22:58

ruiz Jose antonio

Hola en resto de herbáceas sin determinar, ¿de t

19-02-2024 08:01

Stoykov Dimitar Stoykov Dimitar

Hallo,Attached are photos of ascomycete finding, f

17-02-2024 11:59

Francisco  SÃNCHEZ Francisco SÁNCHEZ

Os presento esta colección sobre ramas muertas de

20-02-2024 17:23

Luc Bailly Luc Bailly

Bonjour,Voici une récolte d'une Calloriaceae pour

20-02-2024 15:53

Laurent Bonneau Laurent Bonneau

EN observant mes Saccobolus issus de laissées de

20-02-2024 15:21

Sylvie BIANCARDINI

Bonjour,Trouvé cet Ascobolus sur une laissée de

20-02-2024 12:10

Luc Bailly Luc Bailly

Bonjour à vous, J'ai une récolte d'un Mollisia

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Biscogniauxia sp.
Zetti Mario, 06-11-2023 22:44
I am not sure how much you can help me with these images found on a dead tree presumably Quercus sp. The fungus manifests itself as widespread black stromata forming large irregular patches often in longitudinal patterns. The surface is minutely bumped by almost-microscope pycnidia. 

I have not collected a specimen, but I can if revisit and collect, nonetheless  the cross section of the stroma reveals some data that might be helpful

So to conclude I assume this is  a  Biscogniauxia sp. and wonder if from the photos we can determine the species - maybe Biscogniauxia mediterranea  ?

Tnx
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Enrique Rubio, 07-11-2023 11:37
Enrique Rubio
Re : Biscogniauxia sp.
Hi Mario
More than likely, but it would be better to know what the spores look like or at least to be able to see the typical pyramidal neck of the perithecia.
Zetti Mario, 07-11-2023 21:27
Re : Biscogniauxia sp.
Will do and try to determine the tree if possible. Thanks !
Cheers
Zetti Mario, 12-11-2023 19:05
Re : Biscogniauxia sp.
Hello, so I have worked a bit more on this carbonaceous fungus. 

The host was Quercus ilex
The ostiole is surrounded by a pyramidal projection, like a volcano
The Peritheca a single layer of cylindrical structures, 0.8mm long, 0.2um wide, pentagonal cross-section, sitting on a thin black layer about 50-80um thick
The spores elliptical about 15-19 um long with a longitudinal pale central band.
(14.7) 15.3 - 18.3 (19.3) × (6.4) 7.1 - 8.1 (8.4) µm
IK+, the rim stains like a broad U shape hence haveing a bowl-shaped

I think we can conclude and confirm B. mediterranea
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Enrique Rubio, 12-11-2023 19:18
Enrique Rubio
Re : Biscogniauxia sp.
Yes, Mario, I think so.
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