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04-05-2026 18:13

Black rod-like structures with branching curved conidiophores
Stephen Martin Mifsud Stephen Martin Mifsud

ID request for what seems to be a true aquatic fun

04-05-2026 16:39

Black pseudothecia on submerged foliar debris
Stephen Martin Mifsud Stephen Martin Mifsud

ID request: This specimen was collected in Malta o

04-05-2026 09:50

Una en semilas de Acacia
Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia,(España) re

28-04-2026 20:07

Marthamycetales? - from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

... on twig in the air at standing Ceratonia siliq

03-05-2026 11:38

En dunas
Castillo Joseba Castillo Joseba

Me mandan el material seco, recolectado en dunasLo

02-05-2026 12:42

Hilfe :pour cette éventuelle Orbiliaceae
Alain BRISSARD

Bonjour à tousJeuidi 30 avril dernier on m'a remi

02-05-2026 13:06

Small perithecia on Oenanthe crocata
Pauline. Penna

Bonjour  Please can someone help me with this id

01-05-2026 22:45

Cheilymenia coprophile
Thierry Blondelle Thierry Blondelle

Bonjour à tous, Une récolte sur bouse séchée d

14-04-2026 05:32

Pyrenomycete with yellow subiculum on Aralia
Ethan Crenson

Hi all, A few weeks back a friend pointed out som

28-04-2026 20:33

Parasite on Trochila ilicina?
Vitus Schäfftlein

Hello, I found Trochila ilicina on Ilex aquifoliu

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