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25-04-2025 17:24

Cosmospora/Dialonectria spec.
Stefan Blaser

Hi everybody, This collection was collected by JÃ

11-02-2026 22:15

Rutstroemia maritima?
William Slosse William Slosse

Today, February 11, 2026, we found the following R

11-02-2026 19:28

Pezizaceae spec. from Germany
Lothar Krieglsteiner Lothar Krieglsteiner

on small deciduous twig on the ground in forest wi

09-02-2026 22:01

Sp
ruiz Jose

Hola, me paso esta colección en madera de pino, t

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Hélotiale blanche sur Sambucus racemosa
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous me donner

10-02-2026 18:54

Unknown pink heliotale on sphagnum
Erik Van Dijk

Does anyone has an idea what fungus species this m

09-02-2026 20:10

(2 different or one ?) Hypoxylon from the Algarve – on Acacia and Arbutus
Lothar Krieglsteiner Lothar Krieglsteiner

The first 6 tables show surely one species with 2

09-02-2026 14:46

Cistella granulosella of Hyphodiscus incrustatus?
Anna Klos

Goedemiddag, Op donderdag 5 februari vonden we ti

09-02-2026 11:42

Lachnum sp.
Ã…ge Oterhals

Hi forum, I found this Lachnum on old hardwood tw

02-02-2026 21:46

Dark disc on Populus
Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

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Very small yellow ascomycota
Edit Szilvásy, 19-11-2012 23:43
Edit SzilvásyHi all!
I bring these specimens asking for your help.

Specimens found  on wood of ash.


Spores 10-11X3,5-4 µ


A greeting and thank you very much!


Edit


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  • message #20463
  • message #20463
Hans-Otto Baral, 20-11-2012 09:03
Hans-Otto Baral
Re : Very small yellow ascomycota
This is not easy. Would require a median section to see the ectal excipulum (gelatinized or not), and the iodine reaction of the ascus apex (IKI). Could be a Hymenoscyphus or Bisporella.

What is very small? 1 mm?

Zotto
Edit Szilvásy, 20-11-2012 11:08
Edit Szilvásy
Re : Very small yellow ascomycota
Dear Zotto,
Thank you for your attention.

Iodine reaction:  in Hungary an amateur mycologist not allowed buy Melzer reagent.


I could not make median sections, because the Ascomycota was very small cross-section 0.1 to 0.5 mm.


It seems glass like and gelatinized.


Thanks for the suggestion of looking Bisporella or Hymenoscyphus genus.


For me this is an achievement as well.
Greetings: Edit

Hans-Otto Baral, 20-11-2012 12:13
Hans-Otto Baral
Re : Very small yellow ascomycota
Thje forbid to by Melzer is surely because of the included chloral hydrate. But this substance is unfortunate also for the fungi: see my online article

http://www.gbif-mycology.de/HostedSites/Baral/IodineReaction.htm?

Maybe you can obtain iodine crystals and Kalium (potassium) iodide?

If gelatinous it should be Bisporella citrina.

Zotto
Edit Szilvásy, 20-11-2012 16:41
Edit Szilvásy
Re : Very small yellow ascomycota
Dear Zotto,

I have read the recommended article. It's very interesting and useful. I hope I'm smarter, but the chemistry is a little hard for me. :-)
Greetings: Edit
Hans-Otto Baral, 20-11-2012 17:04
Hans-Otto Baral
Re : Very small yellow ascomycota
The first trials are always the hardest, but when you have an ascomycete with a large amyloid ring you will get excited :-)

Zotto
Edit Szilvásy, 20-11-2012 22:24
Edit Szilvásy
Re : Very small yellow ascomycota
:-) I believe you..
Edit