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01-03-2024 18:06

Marc Detollenaere Marc Detollenaere

Dear Forum,On unidentified moss I found some small

01-03-2024 23:06


Bonjour, Sur laissée de mustélidé indeterminé

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Bernard Declercq Bernard Declercq

Hello,I am looking for a pdf of following paper:Ud

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Charles Grapinet Charles Grapinet

Hello, Yesterday I found a Periconia on a dead Ae

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Yannick Mourgues Yannick Mourgues

On Fagus decorticated wood near a stream. Diametr

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Malcolm  Greaves Malcolm Greaves

Can someone suggest what this might be. It is deve

25-02-2024 19:50

Robin Isaksson Robin Isaksson

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me mandan el material seco de Galicia España reco

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Once again a small black ascomycete? update Durella_connivens
Dirk Gerstner, 04-12-2023 19:29
Hello everyone,

I found the following small black Asco, about 300 to 700ym in size, on a beech branch about 30mm thick without bark. At a height of about 2m on the trunk.
At first I thought again of a lichenized Asco, but with negative Lugol reaction of the Asci I am unsure.
Asci with hook.
Hardly any free spores found.
Spores around 30 x 5 ym
Where can I look further or who knows the species?

Many thanks for your support and opinions

Best regards


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Lothar Krieglsteiner, 04-12-2023 20:07
Lothar Krieglsteiner
Re : Once again a small black ascomycete?
Hello Dirk,
surely more competent people will still answer you. My suggestion would be the genus Durella. With the old key of Zotto I come to D. connivens. Your collection seems to be not fully ripe - couldn`t you observe more free spores, and see if they are septate (in the picture it loosk as if they were already in the ascus ..?). The excipulum looks Durella-like to me.
Yours, Lohtar
Dirk Gerstner, 05-12-2023 14:59
Re : Once again a small black ascomycete?
Hello Lothar,

Thank you very much for your quick reply.
The genus and species you suggested fit quite well.
I compared my photos with Zotto's photos in his "Durella folder".
D. connivens is already a good match.

I still have the branch and am trying to find free septate spores.
It will probably take a while yet.

update, the spores are still not quite ripe but you can already see between 5 and 7 septa. The spore dimensions have also changed. approx. 43-48 x 4.8-6.3 ym.

Best regards

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Hans-Otto Baral, 05-12-2023 21:11
Hans-Otto Baral
Re : Once again a small black ascomycete?
I agree woth D. connivens
Dirk Gerstner, 07-12-2023 19:56
Re : Once again a small black ascomycete?
Zotto, thank you very much for your answer.