02-05-2026 13:06
Pauline. PennaBonjour Please can someone help me with this id
02-05-2026 12:42
Alain BRISSARDBonjour à tousJeuidi 30 avril dernier on m'a remi
01-05-2026 22:45
Thierry Blondelle
Bonjour à tous, Une récolte sur bouse séchée d
28-04-2026 20:07
Lothar Krieglsteiner
... on twig in the air at standing Ceratonia siliq
14-04-2026 05:32
Ethan CrensonHi all, A few weeks back a friend pointed out som
28-04-2026 20:33
Vitus SchäfftleinHello, I found Trochila ilicina on Ilex aquifoliu
30-04-2026 10:28
Rot BojanHello, by appearance I would say that I am dealing
27-04-2026 18:48
Tony MoverleyCollected 23rd April 2026, Norfolk, EnglandSwarms
27-04-2026 20:52
Lothar Krieglsteiner
Found on hanging tiwg of Olea europaea in dried-ou
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