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14-06-2025 13:28

titre : Hypoxylon sur populus
Richard VALERI Richard VALERI

Bonjour à tous.Trouvé au sol, longuement résupi

13-06-2025 16:34

Strossmayeria-like on Fagus
Andgelo Mombert Andgelo Mombert

Bonjour,Un petit discomycète qui me résiste. Il

13-06-2025 19:57

Helvella
Castillo Joseba Castillo Joseba

De ayer en bosque de hayas y avellanosEjemplar uni

12-06-2025 19:36

Lachnum sp. on Larix sp. cones
Rodríguez Borja Rodríguez Borja

Hi, I have got this collection hoping you can giv

13-06-2025 09:41

Aquatic ascomycete.
Josep Torres Josep Torres

Hello.A cerebriform ascomycete sprouting scattered

12-06-2025 15:53

Arthoniales? Saccothecium-like
Viktorie Halasu Viktorie Halasu

Hello, I keep finding something with spores like

12-06-2025 08:58

Help with some synnemata.
Josep Torres Josep Torres

Hello.Some synnemata sprouting in a scattered but

12-06-2025 19:26

Bryoscyphus conocephali
Charles Aron Charles Aron

Hi All, Recently I found this minute Bryoscyphus

12-06-2025 13:04

literature request
Angel Pintos Angel Pintos

Hi, does anyone have the following article: Tibel

11-06-2025 13:44

Ciboria sur feuille d'Alnus alnobetula
Nicolas Suberbielle Nicolas Suberbielle

Bonjour,J'ai trouvé cette espèce aux alentours d

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Microthyrium on Rubus?
Björn Wergen, 08-04-2012 20:58
Björn WergenHi all,

I have found a small, Microthyrium-like pyrenomycete with unitunicate (?) asci and spores about 10-14x3-4,5µm, first with a single medium septa, mature spores with 3 septa, smooth, hyaline, without appendices. 

Substrate: Rubus fruticosus.

I have checked Ellis&Ellis, there are some Microthyrium species described but I think this here is something else. Who can help?

thanks and regards,
björn

edit: Can it be Microthyrium versicolor?
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Alain GARDIENNET, 08-04-2012 22:37
Alain GARDIENNET
Re : Microthyrium on Rubus?
Hi Björn,
Your fungus doesn't look like Microthyrium which are superficial species.
No idea at once.
Alain
Chris Yeates, 09-04-2012 03:42
Chris Yeates
Re : Microthyrium on Rubus?
hello Björn

I agree with Alain - this certainly isn't Microthyrium versicolor which in my experience has quite a thick upper surface and distinctive margin - see the images (not brilliant, but you will get the idea); your spores, while mostly immature, as you say are developing 3 septa - again not suggesting the Microthyriaceae . . . 

Chris
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Björn Wergen, 09-04-2012 07:21
Björn Wergen
Re : Microthyrium on Rubus?
Thank you both, it would be the first time for me with a Microthyrium...so I need some experience, which I get even if THIS is not a Microthyrium ;)

I am interested in what this is...
Chris Yeates, 09-04-2012 14:13
Chris Yeates
Re : Microthyrium on Rubus?
If you want to see Microthyrium, Björn, have a look at fallen Ilex aquifolium and Buxus leaves - you should find it pretty quickly! You will find that the thyriothecia will easily lift off the surface of the leaf with a needle or sharp scalpel blade.

best wishes

Chris