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07-09-2025 08:19

Hymenoscyphus?
Josep Torres Josep Torres

Hello.Tiny pinkish discomycetes, photographed and

09-09-2025 12:07

Trichobolus
Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

08-09-2025 19:07

Hymenoscyphus sp
ruiz Jose

Hola me pasan esta recolecta en madera de fraxinus

03-09-2025 21:59

Vibrissea filisporia f. boudieri
Philippe PELLICIER

La Léchère, Col de la Madeleine, alt 1970m, au s

06-09-2025 21:40

Pyrenomycetes
David Chapados David Chapados

Hi, Does somebody know the genus that has those b

07-09-2025 11:34

Hymenoscyphus vacini
Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I have identified this fungus as Hymenoscyph

02-09-2025 11:34

dark- and small-spored Sordariomycetes on Fraxinus - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10527903

05-09-2025 09:32

Herbier J. Häffner ?
Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour, hi everyone,Do you know where the fungari

05-09-2025 18:53

Lasiobelonium on bark of ulmus
Robin Isaksson Robin Isaksson

Hi! Spores 1 septate; 12-13 x 3um Hairs 35-75

04-09-2025 20:11

Saccobolus verrucisporus cf.
Åge Oterhals

Saccobolus on dear droppings. Can any of you confi

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Claussenomyces?
Marc Detollenaere, 20-03-2020 11:43
Marc Detollenaere

Dear Forum,


On the bark of Quercus, I found some small pale yellow apothecia with pruinose aspect.


Asci were inoperculate and measured 65-72x9µ. The spores were 3-septate and contained a lot of guttules( 22-23x4-4.5µ). Some paraphyses were branched.There was a blue coloration of the apical apparatus with IKI.No conidia were seen.


Could this be Claussenomyces or rather Pezicula?


 


Marc

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Hans-Otto Baral, 20-03-2020 12:57
Hans-Otto Baral
Re : Claussenomyces?
Could you please figure the amyloid reaction? It excludes Claussenomyces.
Marc Detollenaere, 20-03-2020 13:49
Marc Detollenaere
Re : Claussenomyces?
Not the entire apical apparatus but a superficial blue line on the top of the ascus
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Hans-Otto Baral, 20-03-2020 17:01
Hans-Otto Baral
Re : Claussenomyces?
So this is Pseudohelotium sordidulum (= P. vernale). I have it in Hyaloscyphaceae.

Spore width is 2.8-4 µm in this species, I feel your spore width data are too high, isn't it?
Marc Detollenaere, 20-03-2020 19:14
Marc Detollenaere
Re : Claussenomyces?

You are right Zotto, sporewidth was a bit overestimated. I again measured 15 spores and had a mean of 3.8µ.


It matches very well with your pictures in IVV.


Thank you very much


 


Marc