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15-11-2025 23:22

Mario Filippa

Hello,this is what I think to be Hymenoscyphus mac

14-11-2025 16:26

Marian Jagers Marian Jagers

Hello everyone, On dead wood of Cytisus scoparius

15-11-2025 20:25

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, Nov. 2025

15-11-2025 09:21

Josep Torres Josep Torres

Hello.An anamorph resembling Capronia is sprouting

14-11-2025 18:31

Lothar Krieglsteiner Lothar Krieglsteiner

Hello,can somebody provide me with a file of:Rothe

12-11-2025 21:47

ruiz Jose

Hola a todos, me envían esta colección en resto

12-11-2025 09:25

Viktorie Halasu Viktorie Halasu

Hello, I need help with a pale terrestric Pseudom

11-11-2025 20:16

Bohan Jia

Hi, lastly I have found these tiny yellow decayin

09-11-2025 13:20

Josep Torres Josep Torres

Hello.A tiny ascomycete, appearing as erupting gra

08-11-2025 12:10

Elisabeth Stöckli

Bonjour, Trouvé sur tiges mortes de Rubus (ronce

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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

  • message #62159
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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
  • message #62163
  • message #62163
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