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06-11-2023 22:44

Zetti Mario

I am not sure how much you can help me with these

12-11-2023 14:39

Bruno Coué

Bonjour,auriez-vous un avis sur la récolte ci-dss

10-11-2023 22:37

Bernard CLESSE Bernard CLESSE

Une idée de nom pour ce Cistella trouvé sur pét

10-11-2023 17:11

Bernard Declercq Bernard Declercq

Hello,Collected on a fallen corticated branch of P

10-11-2023 21:15

Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Que pensez-vous de cet a

10-11-2023 12:59

Stoykov Dimitar Stoykov Dimitar

Hallo,I am looking for the description and illustr

05-11-2023 20:53

S. Rebecca

Here is a Helotiale fungi found at Werfen/Salzburg

09-11-2023 17:35

Nogueira Héctor

Hello!On branch of Betula sp in Argañoso (León)

06-10-2023 21:48

Rajamaki Martti

Hi! Today (6.10.2023) I found one i think Geoglos

03-11-2023 14:23

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, 26-10-2023

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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  ?

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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 !
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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