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14-12-2011 01:11

Nectria mammoidea?
Björn Wergen Björn Wergen

Hi,I just need a confirmation that I am on the rig

10-12-2011 12:45

Discomycete cúpula Quercus coccifera
Javier Ormad Javier Ormad

¡Hola, de nuevo! Apotecios amarillos citrinos, e

12-12-2011 23:00

In leaves of Pistacia lentiscus
Javier Ormad Javier Ormad

Hola a todos!Apotecios de 1 mm, en zona dorsal de

10-12-2011 12:16

Pilze-AG page with photos of ascomycota
Björn Wergen Björn Wergen

Hi,I want to tell you something about my new page:

10-12-2011 22:56

Helvella
Zykova Masha

Hello!Please, help me identificate this fungus.Thi

11-12-2011 09:07

bryo search
Alain GARDIENNET Alain GARDIENNET

Bonjour, J'aurais besoin de cette page : Bryostrom

09-12-2011 11:11

Literature
Uwe Lindemann Uwe Lindemann

Hello Friends,I am searching for the following pap

07-12-2011 21:12

Peziza megalochondra / vesiculosa
Daniel Ghyselinck

Bonsoir à tous,Voici une pezize récoltée ce wee

12-07-2010 18:40

Mollisia
georges fannechere

Bonjour, La clé des mollisia de Andreas Gminder

05-12-2011 04:28

Helvella
Renée Lebeuf

Bonjour à tous, J'aimerais bien avoir votre aide

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Nectria mammoidea?
Björn Wergen, 14-12-2011 01:11
Björn WergenHi,

I just need a confirmation that I am on the right way with my new Nectria finding on Fraxinus. Perithecia 0,2-0,4mm, with distinct darker ostiole region, orangered to dark red. Spores smooth (?), up to 20x8µm, mostly with a single septa, but some spores with a second septa, thickwalled. Asci with 8 spores. Wall up to 40-50µm thick.

thanks and regards,
björn
  • message #16861
  • message #16861
  • message #16861
Christian Lechat, 14-12-2011 05:12
Christian Lechat
Re : Nectria mammoidea?
Dear Björn,
It could be Neonectria ditissima (Tul. & C. Tul.) Rossman & Samuels

Christian
Björn Wergen, 14-12-2011 09:59
Björn Wergen
Re : Nectria mammoidea?
Hi Christian,

yes, the ditissima was my second opinion, in Nordic Macromycetes (Vol 1) it seems not really clear what "Perithecia uniformly coloured" means (the perithecia were not uniformly coloured). If I select this way, I come directly to N. ditissima with spores around 14-21x5-8µm, which fits well to my finding. 

I know that I have some Nectria-keys somewhere on my PC. If you have some helpful docs, please let me know, I am very interested in pyrenos at all and especially Nectria, Valsa, Diaporthe, Pleospora and so on :D

regards,
björn