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07-12-2015 14:17

Una Peziza a latice giallo-verdastro con croziers
Zugna Marino Zugna Marino

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

29-01-2026 10:04

Séminaire Ascos en Belgique
Jean-Paul Priou Jean-Paul Priou

Bonjour à tous, Marcel LECOMTE président de L'A

21-01-2026 16:32

Lichenicolous coelomycete
Gernot Friebes

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

17-11-2009 22:22

Peziza avec latex
Pablo Chacón Pablo Chacón

Bonne nuit, Voir si vous m'avez élaguée appor

25-11-2012 20:32

Otidea o Peziza?
Bometon Javier Bometon Javier

Ascomas cupoliformes abiertos lateralmente, himeni

25-01-2026 16:08

Geoglossum
Malcolm Greaves Malcolm Greaves

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

27-01-2026 11:43

DNA match
Malcolm Greaves Malcolm Greaves

Is anyone with experience of DNA testing able to t

26-01-2026 11:49

Anamorph on Cytisus
Margot en Geert Vullings

We found this possible anamorph on a dead Cytisus

25-01-2026 23:23

Delitschia/Lojkania? on wood
Tomaz Vucko Tomaz Vucko

Hello! I found this species that resembles Delitsc

18-01-2026 12:24

Anamorph on an olive tree
Josep Torres Josep Torres

Hello.An anamorph located on the surface of a thin

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Black erumpent on Populus (Ascodichaenaceae?)
Edvin Johannesen, 30-06-2025 12:09
Edvin JohannesenThis tiny, rather "rough" erumpent asco was found on a decorticated twig of Populus tremula. Less than 1 mm in diameter. Spores ca. 10-11 x 3-4 µm, slightly bent (allantoid), hyaline, 1-celled. Asci IKI-. Paraphyses filiform, guttulate, somewhat branched. Greeninsh "resinous" substance in hymenium (KOH) - bluish green in Lugol. I'm thinking Rhytismatales/Ascodichaenaceae, possibly Pseudophacidium. P. ledi does not grow on Populus, does it?

Any suggestions?
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Adam Polhorský, 30-06-2025 22:11
Re : Black erumpent on Populus (Ascodichaenaceae?)
Hi Edvin!

Interesting, is this from the monitored Populus log?

I think it could be related to Starbaeckia pseudotryblidioides, which is however only known from Pinus. The macro and micro resemblance is great. I have similar collections from Picea and Larix.

This sample would be interesting to sequence too.

Adam
Edvin Johannesen, 01-07-2025 00:09
Edvin Johannesen
Re : Black erumpent on Populus (Ascodichaenaceae?)
Thanks, Adam. Yes, it's from the same Populus log. There is one specimen of S. pseudotryblidioides from Norway (Nordén 2020), but I haven't checked on what substrate. I'll get back to you.

Cheers!
Edvin Johannesen, 01-07-2025 13:06
Edvin Johannesen
Re : Black erumpent on Populus (Ascodichaenaceae?)
Adam,

It turns out Mathias Andreasen (NINA in Oslo) would very much like to try to sequence it as part of ongoing work. However, it seems like we have more and can find even more material, so it should be possible to send to you, if you're interested.

Cheers and thanks for the response/interest!

Edvin
Adam Polhorský, 01-07-2025 21:04
Re : Black erumpent on Populus (Ascodichaenaceae?)
Ha, that is a really special tree:). Hmm, if the material is not too rich it is perhaps better not to split it and I can later contact Mathias to compare our data.
If it is truly no problem to collect more, I'm really interested. Later I will send you pics of similar colls.
Thank you again:)!!
Edvin Johannesen, 01-07-2025 23:35
Edvin Johannesen
Re : Black erumpent on Populus (Ascodichaenaceae?)
We'll see. Two attempts to sequence are better than one :-)