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02-01-2026 22:48

éric ROMERO éric ROMERO

Bonjour tous, Je profite de cette nouvelle demand

02-01-2026 19:35

William Slosse William Slosse

Good evening everyone,First of all, my best wishes

02-01-2026 17:43

MARICEL PATINO

Hi there, although I couldn't see the fruitbody, I

01-01-2026 18:35

Spooren Marco Spooren Marco

Original loamy soil aside a artificial lake.The co

31-12-2025 19:27

Spooren Marco Spooren Marco

Collected from loamy soil, at waterside (completel

29-12-2025 17:51

Blasco Rafael Blasco Rafael

Hola, me pueden ayudar con esta muestra.Recogida s

30-12-2025 16:44

Pascal Ducos

Bonjour,Une anamorphe rose stipitée, très nombre

29-12-2025 23:20

éric ROMERO éric ROMERO

Bonjour, Une récolte du mois d'août 2025 en tou

30-12-2025 17:14

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous aider Albe

30-12-2025 15:31

Johan Boonefaes Johan Boonefaes

I found this unknown star form by the microscopy o

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Nectria with pale brown spores
Björn Wergen, 07-03-2012 11:09
Björn WergenHi all,

a few days ago I have found a small, single growing Nectria on old Quercus wood. It has 0,2-0,3 mm broad, bright red perithecia with protuding same-coloured ostiolus. 

The main interesting thing is that it has pale brown mature spores with verrucose ornamentation and a single septa. I had 3 other Nectria that day with similar but hyaline spores, differing in spore size and ornamentation. 

I did not see any conidia (or do the black stipes having a relation to the Nectria?)

Spores are 10,5-12,5x4-6µm, Asci 90-110x5-6µm.

regards,
björn
  • message #17657
  • message #17657
  • message #17657
Björn Wergen, 07-03-2012 11:58
Björn Wergen
Re : Nectria with pale brown spores
Hi Yan, do you mean the Cosmospora aff. magnusiana thread from Zotto? These findings were on Diatrype species, my was on wood associated by Protounguicularia barbata. Cosmospora seems to be unclear these days :/
Christian Lechat, 07-03-2012 16:19
Christian Lechat
Re : Nectria with pale brown spores
Dear Björn,
at present, several research teams are working with the "Cosmospora" in the world. It seems that there is numerous species in this group but we do not yet know well how to separate them.?
Yan is right, it is impossible to know what is your specimen without culture and molecular data. Jacques Fournier and I are working with "Cosmospora", as soon as we will have some results we will notify you.

Furthermore, I would like to study your collection, if you agree, you can send it to me

Regards,
Christian

Ascofrance
64, route de Chizé
79360 Villiers en Bois
France

Björn Wergen, 07-03-2012 22:27
Björn Wergen
Re : Nectria with pale brown spores
Hi Yan and Christian,

thanks.

@Christian: Of course I will send you. I have some other Nectria here, I will send them too, perhaps you can do something with them :)

regards,
björn
Christian Lechat, 07-03-2012 22:46
Christian Lechat
Re : Nectria with pale brown spores
Ok Björn,
I'm waiting for your sending

Christian