Accès membres

Mot de passe perdu? S'inscrire

27-04-2026 20:52

Mollisia or related genus from Portugal - with quite peculiar character
Lothar Krieglsteiner Lothar Krieglsteiner

Found on hanging tiwg of Olea europaea in dried-ou

27-04-2026 18:48

Micropodia pteridina?
Tony Moverley

Collected 23rd April 2026, Norfolk, EnglandSwarms

27-04-2026 17:41

another anamorph on monocotyleous remains from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, same leaf than the last post. The con

27-04-2026 18:05

bright green minute anamorph on Citrus aurantius-twig from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

... still attached at standing tree. The green con

27-04-2026 17:16

anamorph on monocotyleous leaves from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, moist lying.The conidiomata look like

27-04-2026 12:54

Spiral conidial crust
Steve Clements

Bonjour. Ce petit champignon blanc résupiné et

27-04-2026 09:59

Microdiplodia henningsii
Pauline. Penna

Bonjour Can anyone advise me on these pycnidia fo

26-04-2026 21:08

Ramularia sp ?
William Slosse William Slosse

Several species of Ramularia occur on Rumex that I

22-04-2026 20:54

Pyrenopeziza on monocot.
Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

25-04-2026 11:34

lachnum pudicellum
Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

« < 1 2 3 4 5 > »
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