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26-04-2025 16:01

Michel Delpont
Jacques Fournier Jacques Fournier

J'ai le regret d'informer les membres du forum qui

26-04-2025 07:15

Paranectria?
Dragiša Savic

Hello everyone,the lichen is Candelariella aurella

25-04-2025 22:48

Hilberina from Japan
Gustaf Fredell Gustaf Fredell

Hello,I hope everything is going well. I couple mo

18-04-2025 23:16

Mollisia
Robin Pétermann Robin Pétermann

Bonjour, Voici une probable Mollisia, genre que j

24-04-2025 21:35

Asco on Salix leaf
Thorben Hülsewig

Hi there,last week i could found this asco on an S

25-04-2025 17:24

Cosmospora/Dialonectria spec.
Stefan Blaser

Hi everybody, This collection was collected by J

25-04-2025 09:33

Help with a Pyrenomycete.
Josep Torres Josep Torres

Ascomata shaped like deformed black grains, measur

24-04-2025 21:53

ascoconidia in Cudonia circinans (?) from France
Lothar Krieglsteiner Lothar Krieglsteiner

... 15.7.24 in the Alps. There were many asci with

23-04-2025 20:16

Sarcosagium campestre 281123 143
Miguel Ãngel Ribes Miguel Ángel Ribes

Good afternoon Looking for Octospores / Lamprospo

24-04-2025 15:03

Lasiobolus macrotrichus?
Henri Koskinen

Hello, I collected this Lasiobolus 22.04. near Hel

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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