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07-12-2015 14:17

Zugna Marino Zugna Marino

Buon giorno a tutti, ad un primo momento, non ess

29-01-2026 10:04

Jean-Paul Priou Jean-Paul Priou

Bonjour à tous, Marcel LECOMTE président de L'A

21-01-2026 16:32

Gernot Friebes

Hi,I need your help with some black dots on a lich

17-11-2009 22:22

Pablo Chacón Pablo Chacón

Bonne nuit, Voir si vous m'avez élaguée appor

25-11-2012 20:32

Bometon Javier Bometon Javier

Ascomas cupoliformes abiertos lateralmente, himeni

25-01-2026 16:08

Malcolm  Greaves Malcolm Greaves

This Geoglossum had spores mostly 70-80 (87) with

27-01-2026 11:43

Malcolm  Greaves Malcolm Greaves

Is anyone with experience of DNA testing able to t

26-01-2026 11:49

Margot en Geert Vullings

We found this possible anamorph on a dead Cytisus

25-01-2026 23:23

Tomaz Vucko Tomaz Vucko

Hello! I found this species that resembles Delitsc

18-01-2026 12:24

Josep Torres Josep Torres

Hello.An anamorph located on the surface of a thin

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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.