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Jean-Luc Ranger

Bonjour, je me demande si cette Helvelle ne serait

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Bonjour, Après moultes recherches plutôt infruc

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Marc Detollenaere Marc Detollenaere

Dear Forum,I found some colonies of orange coloure

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Miguel Ã�ngel Ribes Miguel Ángel Ribes

Good afternoon This small pink ascomycete, 2 mm i

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Wim de Groot

We found this small black spots on perennial stem

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Masanori Kutsuna

Hello, Does anyone have following article and cou

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Jean-Luc Ranger

Je pensais avoir à faire à un Hypomyces mais les

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BonsoirRécolté par un ami sur un tilleulJ'ai tr�

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Karl Soler Kinnerbäck

Hi! Found this small disco on herbaceous stems in

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Adam Polhorský

Hello, can anyone provide this work? Samuels GJ (

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Nectrialike on soil
Martin Bemmann, 30-10-2011 14:52
Martin BemmannHello,

today I found on soil a nectriacious fungus growing between mosses and nostoc, close to Aleuria aurantia and Octospora sp..
Ascomata measure 0.25 mm in dm.
Spores are uniseptate with many oildrops and measure 19.5-22.4x8.5-9.7 µm.

Anyone an idea?

Best regards,

Martin
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Hans-Otto Baral, 30-10-2011 17:26
Hans-Otto Baral
Re : Nectrialike on soil
Hi Martin

I fear you need to test the peridium with KOH. But the spores are quite heteropolar, unlike Hypocreales

Zotto
Christian Lechat, 30-10-2011 18:08
Christian Lechat
Re : Nectrialike on soil
Hi Martin,
maybe it is the genus Pronectria.
Could you make a vertical section of the ascomatal wall?
Are there some paraphyses among the asci? I assume that the ascomatal wall does not change of color in KOH?

Regards,
Christian
Martin Bemmann, 30-10-2011 22:07
Martin Bemmann
Re : Nectrialike on soil
Hi Zotto and Christian,

I am short with KOH. I ordered fresh supply that will reach me next week... I wonder, however, if I will be able to make a section through these tiny sandburied ascomata. :-( It will be a crunchy experience I presume...

My hope was that the ecology would possibly give a hint.

@Zotto: you are right with the heteropolar spores, but to my impression they occur among hypocreales as well. I furthermore do not exclude that these spores are submature (very few "free ones") and possibly mute to muriforme ones...

@Christian: I think I saw a single paraphysislike thing (I searched for those) that was filiform with a very slight apical thickening.

Best regards,

Martin
Christian Lechat, 31-10-2011 04:30
Christian Lechat
Re : Nectrialike on soil
Here is a PDF of Pronectria terrestris, Martin, take a look at it to see if it fits with your specimen.
Christian
Martin Bemmann, 31-10-2011 18:16
Martin Bemmann
Re : Nectrialike on soil
Hi Christian,

thank you very much for this paper! I contacted Paul Diederich and he is inclined to agree that this is Pronectria terrestris. His second collection featured spores of the size as in mine. I tried to collect some more specimen today but had no time yet to search with the dissecting microscope.

Best regards

Martin