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20-02-2026 18:47

Nectriopsis oropensoides on Fagus?
Marc Detollenaere Marc Detollenaere

Hello Forum,On rotten wood of Fagus, I found some

07-02-2023 22:28

Fracchiaea callista? on Carpinus
Ethan Crenson

Hello friends, On Sunday, in the southern part of

19-02-2026 17:49

Ayuda con Tarzetta sp
Salvador Emilio Jose

Hola buenas tardes!! Necesito ayuda para la ident

09-02-2026 22:01

Sp
ruiz Jose

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

19-02-2026 13:50

Hairy disc-"Patinella sanguineoatra" like
Margot en Geert Vullings

We found this collection on deciduous wood on 7-2-

19-02-2026 12:01

Ayuda con esta
Castillo Joseba Castillo Joseba

Me mandan el material de Galicia (España), recole

17-02-2026 09:41

Diaporthe spiculosa?
Maren Kamke Maren Kamke

Good morning, I found a Diaporthe species on Samb

16-02-2026 21:25

Pyreno in the bark of Lonicera xylosteum
Andreas Millinger Andreas Millinger

Good evening,failed to find an idea for this fungu

08-12-2025 17:37

Cucurbidothis parmeliarum (pithyophila var. cembrae) - on Abies
Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

17-02-2026 17:26

Recherche biblio Lambertella WHETZEL 1943
Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous, Je recherche cette publication :

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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