31-03-2026 21:18
Miguel Ángel Ribes
Good evening. oes anyone have the original descrip
31-03-2026 20:57
Stefan BlaserHello everybody, I hope somebody can help me with
26-03-2026 15:31
Åke Widgren
Hello,I found this one in October last year, on r
31-03-2026 16:20
Mlcoch Patrik
Hello, Please about help with determination. On
31-03-2026 08:19
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous m'aider à
30-03-2026 12:03
William Slosse
Hello all,On 27/03/26, in Kraaiveld in Wingene (Be
25-03-2026 10:35
Hulda Caroline HolteHello,I collected this species growing on a dead b
30-03-2026 09:53
Yanick BOULANGERBonjourVoici des petites fructifications poilues s
I found these conidia on Fagus sylvatica (a thick slice of the stem). They resemble Prosthecium pyriforme but this species is restricted to Acer.
The conidia are muriform, have a 1,5 µm thick hyaline sheath and measure 32-38 x 14-17 µm (without sheath).
Is it possible to determine the species?
Regards
Steffen
Hi Steffen,
Concerning the bark features seen in your illustration the substrate clearly is not Fagus but Acer pseudoplatanus.
So you are right, the species is from the Stegonsporium pyriforme group, there are three cryptic species which can only be reliably identified by sequence data.
See Voglmayr, H., Jaklitsch, W. M., 2014. Stilbosporaceae resurrected: generic reclassification and speciation. Persoonia 33: 61-82, available for free download at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4312938/
Hermann
thank you for your answer. I think, you are right with the substrate.
Looking at the picture I was in doupt too, but I was too sure with Fagus. On top of that the conidia seemed a bit slender (width 17-20 µm according to Ellis & Ellis). But your and Mr. Jaklitsch's article confirm my measurements.
Are you interested in this collection for your studies?
Regards
Steffen
Many thanks for your offer of the material - however, the Stegonsporium project is finished, so I don't need additional specimens.
Best wishes, Hermann