21-11-2025 10:56
Christopher Engelhardt
Very small (~0,5 mm) white ascos, found yesterday
21-11-2025 11:52
Jean-Luc RangerBonjour à tous, on voit toujours 2 espèces areni
14-11-2025 16:26
Marian Jagers
Hello everyone, On dead wood of Cytisus scoparius
17-11-2025 21:46
Philippe PELLICIERBonjour,Récolté sur bois pourrissant de feuillu
20-11-2025 14:14
Mick PeerdemanFound on the leaves of 'Juglans regia' in the Neth
Microthyrium on Rubus?
Björn Wergen,
08-04-2012 20:58
Hi 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?
Alain GARDIENNET,
08-04-2012 22:37
Re : Microthyrium on Rubus?
Hi Björn,
Your fungus doesn't look like Microthyrium which are superficial species.
No idea at once.
Alain
Your fungus doesn't look like Microthyrium which are superficial species.
No idea at once.
Alain
Chris Yeates,
09-04-2012 03:42
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
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
Björn Wergen,
09-04-2012 07:21
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...
I am interested in what this is...
Chris Yeates,
09-04-2012 14:13
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
best wishes
Chris