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06-08-2025 08:56

Scutellinia cf. subhirtella
Antonio Ezquerro Antoñana Antonio Ezquerro Antoñana

Hola a todos, Me gustaría saber qué opinan sobre

12-02-2012 11:31

Spooner 1987 Australasia
Hans-Otto Baral Hans-Otto Baral

Hi allI am quite sure that nobody has a pdf of thi

02-08-2025 12:35

Hymenoscyphus albidus ?
éric ROMERO éric ROMERO

Bonjour tous, J'ai trouvé sur pétiole de Fraxin

02-08-2025 17:21

Pleomassaria protrusa description
Andgelo Mombert Andgelo Mombert

Bonjour,Je recherche la description et la planche

30-07-2025 20:52

apo on Pteridium aquilinum
Bohan Jia

Hi together,  I've been looking posts in AscoFra

30-07-2025 10:12

Asco1 sur crotte de mouton
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

31-07-2025 16:32

Carbophilous discomycete - Anthracobia pseudorehmii?
Andreas Gminder Andreas Gminder

Dear collegues,today I found on a very fresh fire

30-07-2025 18:06

Orbilia dryadum?
Stefan Jakobsson

On a decorticated twig of Alnus incana on moist so

29-07-2025 18:59

Ayuda con esta
Castillo Joseba Castillo Joseba

Me mandan el  material seco de Galicia, España,

28-07-2025 12:34

Capronia
Enrique Rubio Enrique Rubio

Hi to everybody.I would appreciate any ideas about

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Discomycete with muriform(?) spores on Sambucus racemosa
Edvin Johannesen, 06-10-2020 14:04
Edvin Johannesen
Hi!

I am struggling with this tiny disco with a grey hymenium and a white, downy rim. I have only two apothecia, so not much to play with.  Asci measure approx. 200 x 10 microns (in water) - shorter (ca. 150) in Lugol.  Spores ca. 17 x 9-10 microns. They are either muriform or multiguttulate - it's hard to tell - and hyaline. The entire ascus "cap"is reddish-brown in Lugol (no pre-treatment with KOH).  Paraphyses filiform, ca. 1 micron thick.  Asci appear to be 4-spored or else 4 spores are consistently aborted.

Suggestions appreciated.  Thanks.
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Edvin Johannesen, 06-10-2020 14:05
Edvin Johannesen
Re : Discomycete with muriform(?) spores on Sambucus racemosa
Microscopic details in water
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Edvin Johannesen, 06-10-2020 14:06
Edvin Johannesen
Re : Discomycete with muriform(?) spores on Sambucus racemosa
In Lugol
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Martin Bemmann, 06-10-2020 15:44
Martin Bemmann
Re : Discomycete with muriform(?) spores on Sambucus racemosa
Hi Edvin,

perhaps a lichen. There seem to be enough algae visible on the macrophoto.

regards

Martin
Hans-Otto Baral, 06-10-2020 17:06
Hans-Otto Baral
Re : Discomycete with muriform(?) spores on Sambucus racemosa
I cannot see pic 3 and on the other I do not see algae. The red IKI reaction of the apical ring is interesting. I suggest to test also IKI after KOH, whether the ascus wall also reacts.

The thin paraphyses seem strongly branched.

Cryptodiscus muriformis resembles somewhat your specimen, including the 4-spored asci, but the spores are much larger and the apos orange. Here the entire ascus wall reacts, but also a distinct apical ring.

Important would be a section to study the margin, and perhaps also the presence of algae.

The large oil drops mask the cell walls. If you mount in MLZ or CB, or CR, you will better see the walls.
Edvin Johannesen, 06-10-2020 17:38
Edvin Johannesen
Re : Discomycete with muriform(?) spores on Sambucus racemosa
Thanks to both for your comments. It turns out that this one has been collected several times along the coast of Norway. A paper is in progress. I think one of the author will comment here. Sambucus is a new host/substrate.