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02-07-2025 18:45

Elisabeth Stöckli

Bonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

02-07-2025 17:26

Yanick BOULANGER

BonjourRécolté sur une brindille au fond d'un fo

02-07-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello, bonjour.Here is the paper I'm searching for

30-06-2025 16:56

Lydia Koelmans

Please can anyone tell me the species name of the

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

30-06-2025 12:09

Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 06:57

Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 19:05

ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

30-06-2025 14:45

Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

25-06-2025 16:56

Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

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Hyphodiscus species
Marcus Yeo, 01-12-2013 22:33
This discomycete was growing on a decorticated fallen branch of a deciduous tree in woodland. Most apothecia were growing on an indeterminate fungal crust, some were growing directly on wood.

Apothecia are sessile, ca 0.3 mm diameter; the hymenium is light brown with incurved margins.


Excipulum is a textura oblita, strongly gelatinised.


Hairs are 10-20 x 3-4 µm; very rough; with yellow pigment.


Asci are 40-45 x 5 µm, 8-spored, with a weak red reaction in IKI.


Spores are 5-6 (-7) x 2-3 µm, with 2 small oil bodies.


Paraphyses are ca 1-1.5 µm wide, with non-refractive contents.


The combination of characters indicate a Hyphodiscus. The closest fit seems to be H. hymeniophilus, but I'm not sure whether some of the characters (e.g. hairs with yellow pigment) fit this species.

I'd be grateful for any advice.

Thanks

Marcus    

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Hans-Otto Baral, 01-12-2013 22:40
Hans-Otto Baral
Re : Hyphodiscus species
Hi Marcus

Yes, Hyphodiscus. But I am not sure if the  spores fit hymeniophilus. The yellow pigment is not a constant character.

It is a very difficult genus!
Zotto
Marcus Yeo, 01-12-2013 22:52
Re : Hyphodiscus species
Zotto

Many thanks for your reply. If you think it is a difficult genus, then there is little hope for the rest of us!

The other species I considered is the taxon you call H. "hemiamyloideus" but the spores didn't seem quite right in size and guttulation.

Marcus
Hans-Otto Baral, 01-12-2013 22:58
Hans-Otto Baral
Re : Hyphodiscus species
yes, hemiamyloideus is not impossible but tends to shorter spores.

was it impossible to see a reddish IKI reaction?
Marcus Yeo, 01-12-2013 23:09
Re : Hyphodiscus species
Yes, there was a definite red reaction in IKI - not very strong, but definitely present.