Orbilia "trechispora"? - Forum ASCOFrance

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Orbilia "trechispora"?

Przemyslaw Drzewiecki, 01-12-2022 23:50

30.11.2022; Mochle near Bydgoszcz, Poland. Old horse pasture fence post. (Pinus sylvestris). Not so many.
I thought it was Orbilia xanthostigma, but the appearance of the ascospores did not fit this kind of completely. I therefore ask for aid in determining the species of the fine.
Best regards: Przemek

Przemyslaw Drzewiecki, 02-12-2022 00:05

Re : Orbilia "trechispora"?

Cont.

Hans-Otto Baral, 02-12-2022 09:47

Re : Orbilia "trechispora"?

This is O. xanthostigma anyway. The curvature of the spores may sometimes be only slight, but we rarely saw such cases. Then the spore is especially thick.

Przemyslaw Drzewiecki, 02-12-2022 11:04

Re : Orbilia "trechispora"?

Thank you for clearing my doubts. I would say that here the curvature of the spores is rather exaggerated. :-) In the microscope slide, I saw conidia that do not match these Orbilia. Are they alien?

For those interested, I've attached last year's photo of typical O. xanthostigma ascospores.
Best regards: Przemek

Hans-Otto Baral, 02-12-2022 11:59

Re : Orbilia "trechispora"?

Yes, these are typical ascospores. The conidia might be orbiliaceous but not belonging to this species.

Przemyslaw Drzewiecki, 02-12-2022 12:22

Re : Orbilia "trechispora"?

Thank you again. It's great to get the opinion of a real expert. Greetings from Poland

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