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29-12-2019 17:10

Petit asco blanc turbiné-stipité sur Salix cinerea
Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Voici un petit asco blan

29-12-2019 10:23

Karstenia
Andgelo Mombert Andgelo Mombert

Bonjour, Sur branches mortes de Sambucus nigra.

29-12-2019 10:13

Calycina sp. ?
Andgelo Mombert Andgelo Mombert

Bonjour, Sur bois mort décortiqué de Fraxinus e

28-12-2019 10:59

Ascocoryne cylichnium var. cylichnium ou Ascocoryne cylichnium var. deuncinata ? sur Salix alba
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et à tous,Que pensez-vous de ce

27-12-2019 05:59

Which Xylariaceae?
Garrett Taylor Garrett Taylor

I found this two days ago on decorticated Ulmus in

28-12-2019 14:21

Septoria ? on Salix buds in subalpine habitat
Edvin Johannesen Edvin Johannesen

These black spheres (acervuli or pseudothecia? - n

27-12-2019 02:29

Coprophilous fungus
Lepista Zacarias

Dear all,I'm in trouble with my microscope and it

27-12-2019 02:29

Coprophilous fungus
Lepista Zacarias

Dear all,I'm in trouble with my microscope and it

25-12-2019 17:54

Peziza/ Pachyella? SP
Valencia Lopez Francisco Javier

Hola a todos/asEstas supuestas pezizas estaban en

26-12-2019 16:29

Roseadiscus formosus?
William Slosse William Slosse

Hello forum, on 19-12-2019 I found on an old dune

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Nectrioid fungus on Cornus
Eduard Osieck, 18-12-2019 19:35
This nectrioid fungus was found on a dead Viburnum branch still attached to a fallen shrub. The dark yellow perithecia (KOH+, 0,5 mm only 0,25-0,3 mm visible) were largely embedded in the substratum. The 7-septate brownish spores were rather large: 68-72 x 11-13 um. Intact asci not seen.

All suggestions are welcome!

Eduard


Note: Substrate corrected 24/02/2022
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Martin Bemmann, 18-12-2019 19:59
Martin Bemmann
Re : Nectrioid fungus on Cornus
Hi Eduard,

this is Pseudotrichia viburnicula. Would be nice to have your collection details (date an location). This fungus is plurivorous, I think Cornus is a new host.


best regards

Martin

PS: if it is from the NL, there ia a collection from Steenbergen on Crataegus by Aafke Buijs in 2015.
Eduard Osieck, 18-12-2019 21:14
Re : Nectrioid fungus on Cornus
Hi Martin,

Thank you very much for the prompt identification as Trichonectria viburnicola! Clearly, I was misled by the yellow (top of the) perithecium and the positive KOH-reaction.


Little information about this species in the literature but the more on this site including your document of the Heidelberg collection and your message in 2013. Yes my collection was done in the Netherlands, so this is the second collection after the one in Steenbergen on Crataegus.


Cheers, Eduard