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23-03-2025 12:01

Thierry Blondelle Thierry Blondelle

Bonjour à tous,Ce sont de petits coussinets blanc

24-03-2025 14:58

Karl Soler Kinnerbäck

Hi,Dark, erumpent disco on Vaccinium myrtillus, ce

24-03-2025 16:20

Henri Koskinen

I found this very small Elaphomyces on a wet almos

23-03-2025 20:27

Thomas Flammer

I have no idea where to startsubstrate: deciduous

19-03-2025 17:47

Philippe  Larue Philippe Larue

Bonjour à tous, chaque année à l'approche du p

23-03-2025 10:09

Michel Hairaud Michel Hairaud

Bonjour, Hi to everyone, The English text is avail

23-03-2025 01:00

Juuso Äikäs

These little black pyrenos were growing on bark of

20-03-2025 22:35

Yanick BOULANGER

BonsoirJ'ai récupéré cet ascomycète d'un amiJe

19-03-2025 09:29

Michel Hairaud Michel Hairaud

Bonjour, Récolté sur hépatiques colonisant un

21-03-2025 19:32

Benko Gabor Benko Gabor

Dear Ascofrance,I would like to ask for your help.

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Anamorphe sur Stereum
Thierry Blondelle, 23-03-2025 12:01
Thierry BlondelleBonjour à tous,

Ce sont de petits coussinets blancs ressemblants à des sporodochies qui colonisent ce basidiome de Stéreum.  La sporulation à l'extrémité d'hyphes simples me fait penser à une forme anamorphe du genre Chrysosporium que l'on retrouve sur d'autres champignons. 

conidies: 6.2-6.6 x 3.9-4.1 µm

Si l'un d'entre vous a déjà rencontré une forme ressemblante, je suis intéressé par vos observations.

Merci d'avance

Thierry



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Josep Torres, 24-03-2025 14:32
Josep Torres
Re : Anamorphe sur Stereum
Hi Thierry.
We've seen this around here before.
http://www.ascofrance.com/search_forum/68601
I've seen something very similar as a possible Stilbella sebacea. It all fits, though according to Angel Pintos, it could be Clonostachys.
Best regards.
Thierry Blondelle, 24-03-2025 19:28
Thierry Blondelle
Re : Anamorphe sur Stereum
Hello Josep

Microscopy looks seemly like mine. Just a difference in the fruitbody shape. Rather a sporodochia than a synnemata to my mind. A positive point of Stilbella is its growth on Stereum but few pictures on the web. The only alternative way I found is Helicogloea compressa where hyphae closed in an external gelatinous matrix.

Greetings
Josep Torres, 25-03-2025 08:03
Josep Torres
Re : Anamorphe sur Stereum
Hi Thierry.
I'm not saying that your case is Stilbella sebacea, I'm just saying that I have something very similar to what you're presenting as Stilbella sebacea. You're right in appearance, but it may be due to excess moisture. I also don't see in the few conidia you show the thick walls that Stibella sebacea conidia should have, up to 0.5 microns thick. Everything fits in my study: the width of the hyphae, conidiogenesis, the measurements of the phialides, and also, of course, the morphology and measurements of the conidia.
I think you should measure all these parameters carefully before choosing one species or another.
I'm not aware that the Helicogloea compressa you're suggesting can appear on Stereum basidiomata, and it would be more likely a lignicolous species.
Good luck with your fungus.
Best regards.