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11-02-2026 22:15

Rutstroemia maritima?
William Slosse William Slosse

Today, February 11, 2026, we found the following R

11-02-2026 19:28

Peziza spec. from Germany
Lothar Krieglsteiner Lothar Krieglsteiner

on small deciduous twig on the ground in forest wi

25-04-2025 17:24

Cosmospora/Dialonectria spec.
Stefan Blaser

Hi everybody, This collection was collected by JÃ

09-02-2026 22:01

Sp
ruiz Jose

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

10-02-2026 17:42

Hélotiale blanche sur Sambucus racemosa
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous me donner

10-02-2026 18:54

Unknown pink heliotale on sphagnum
Erik Van Dijk

Does anyone has an idea what fungus species this m

09-02-2026 20:10

(2 different or one ?) Hypoxylon from the Algarve – on Acacia and Arbutus
Lothar Krieglsteiner Lothar Krieglsteiner

The first 6 tables show surely one species with 2

09-02-2026 14:46

Cistella granulosella of Hyphodiscus incrustatus?
Anna Klos

Goedemiddag, Op donderdag 5 februari vonden we ti

09-02-2026 11:42

Lachnum sp.
Ã…ge Oterhals

Hi forum, I found this Lachnum on old hardwood tw

02-02-2026 21:46

Dark disc on Populus
Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

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Nectria s.l. inconnu sur Hypoxylon fragiforme
Andreas Gminder, 21-05-2014 00:15
Andreas Gminder

Bonjour chers collègues,


 


aujourd'hui j'ai ramassé un Nectria s.l. sur Hypoxylon fragiforme, que m'etonne par ces charactèrs que je ne connais pas (ce que ne veut dire beaucoup, car je connais des Nectrias assez mal ....)


 


Les spores sont assez petit, appr. 8-10 µm de longeur, verruculeuse.


C'est pas Nectria episphaeria, parce-que les perithecia ne sont pas papillé, mais avec une sommet applati.


Voici des impressions sur cets perizhecia.


 


peut quelqu'un me donner un piste pour cet espèce, ou me instruire que je doit examiner en plus?


merci beaucoup,


Andreas

  • message #29391
  • message #29391
  • message #29391
Cesar Herrera, 21-05-2014 01:02
Re : Nectria s.l. inconnu sur Hypoxylon fragiforme
Hi,

I bet this fungus is Cosmospora arxii. The apex of the perithecia does puzzles me a bit, though. The perithecia of specimens that I have seen of C. arxii have had blunt apices. I think it must be a morphological variant of the same species. You can confirm the identity of the fungus by isolating it into pure culture. It should have a salmon-pink colony on potato-dextrose agar.

Best,

Cesar Herrera
Andreas Gminder, 21-05-2014 07:34
Andreas Gminder
Re : Nectria s.l. inconnu sur Hypoxylon fragiforme

Dear Cesar,


 


thank you very much for your tentative identification.


Unfortunately I have no possibility to make a pure culture of it. Is there something else to verify the identification? How certain is it that I can put the name arxii to it?


 


thank you again,


Andreas

Alain GARDIENNET, 21-05-2014 07:42
Alain GARDIENNET
Re : Nectria s.l. inconnu sur Hypoxylon fragiforme

Hi Andrea, hi Cesar.


Cesar, could you send me a complete description of C. arxii please.


This fungus is very current in our countries.


Alain

Christian Lechat, 21-05-2014 12:19
Christian Lechat
Re : Nectria s.l. inconnu sur Hypoxylon fragiforme
Cosmospora arxii sexual state is not described. Only asexual state was described by Gams 1971 as Acremonium arxii.

Andreas, if you want I can try a culture from your specimen. I am interested because there are two species occuring on H. fragiforme. One with a pink-salmon colony and another with a green colony.

Regards,
Christian