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FRANCIS FOUCHIER

Bonjour , je recherche en pdf cet article: KORF R

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David Chapados David Chapados

Hi! Could someone help me identifying this specim

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Per Vetlesen

HiIt was found on the bark of a dead branch of Jun

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Per Vetlesen

Grown in moist chamber on bark/resin of fallen Pin

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Viktorie Halasu Viktorie Halasu

Hello, could anyone please send me the article wi

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David Gibbs David Gibbs

Help with this one much appreciated, on rotting Fa

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Bonjour forum, Trouvé sur bois de feuillu très d

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Robin Isaksson Robin Isaksson

Hi!Found i Japan on bark of Abies sp. Spores 35-4

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Minute bright yellow discomycete
Daniel Ghyselinck, 24-01-2012 20:29
Dear all,

I have collected last week this minute (max 0,4 mm) bright yellow discomycete on deciduous decorticated wood.
Paraphyses densely filled with yellow granules.
Spores about 20 – 26 x 4 – 4,5 µm, also with yellow granules, at maturity with 3 septum.
Ascus 8 spored, apex blue in IKI.

Thanks in advance for your suggestions.

Best regards,
Daniel
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  • message #17189
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Hans-Otto Baral, 24-01-2012 20:46
Hans-Otto Baral
Re : Minute bright yellow discomycete
Hi Daniel

I am very happy to see these splendid photos of living elements. This makes identification much easier and clear.

This is Calycellina ochracea, a curious species characterized by these refractive yellowish VBs in the paraphyses, in which it resembles Rodwayella citrinula.

The "granules" in the spores are oil drops. You can easily make the test: When you add KOH the spore guttules will resist but those in the Paraphyses will disappear. They are only seemingly similar.

If you have Cresyl blue you can colour the spore wall in deep lilac. The round conidia formed on the germinating spores are also typical.

The species is not frequent. I would be glad? when you can tell me the region where you collected it. No idea of the host tree?

Zotto
Gernot Friebes, 24-01-2012 20:48
Re : Minute bright yellow discomycete
Hi Daniel,

looks similar to Calycellina ochracea.

Best wishes,

Gernot

PS.: To slow :-(
Daniel Ghyselinck, 24-01-2012 20:56
Re : Minute bright yellow discomycete
Thanks a lot Zotto,

I will immediately make the test with KOH and Cresyl blue, and post the result on the forum.

It was collected in Belgium, Province Brabant Wallon, near Nivelles (Monstreux - Bois du Planti) on 15.01.2012.

Unfortunately no idea of the host, it was found by my wife (as usual, she founds everything !), in a pure deciduous mixed forest, and I just got a small piece of rather rotten wood.

Daniel
Daniel Ghyselinck, 24-01-2012 21:42
Re : Minute bright yellow discomycete
Hi Zotto and Gernot,

The VBs in the paraphyses effectively disappears in KOH, while the oil drops in the spores did not.

And the spores became deep lilac in Cresyl blue.

It's a very curious and interesting species, indeed !

Daniel
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