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03-10-2025 22:03

Unknown asco found in a root hole
Francois Guay Francois Guay

Hi everyone, I found this weird asco growing on wo

05-10-2025 16:41

Could this be Bacidina chloroticula in a mat of algae/lichens?
François Bartholomeeusen

Dear forum members, On a mat of dried algae/liche

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Bonjour, cette Otidea de petite taille de 1-2 cm c

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Unknown asco found in a root hole
Francois Guay, 03-10-2025 22:03
Francois Guay
Hi everyone, I found this weird asco growing on wood in a root hole, and I have no clue what it is.

Spores: 20–31.7 × 4.7–6.4 µm

Asci: IKI+ with croziers

Here’s the iNat post with photos and microscopy: https://www.inaturalist.ca/observations/318343963

Any idea what it could be?
Thank you!
Hans-Otto Baral, 04-10-2025 08:45
Hans-Otto Baral
Re : Unknown asco found in a root hole
Clearly overmature, the spores are probably non-septate when mature but get 3-septate when producing conidia. The apical ring is not very typical but I suggest searching in Rutstroemiaceae although the apos are very small and unusual and the ectal excipulm very short-celled.
Francois Guay, 05-10-2025 21:23
Francois Guay
Re : Unknown asco found in a root hole
Thanks, Zotto. I appreciate the suggestion; it's the first time I've observed ascospores producing conidia in this manner. I will certainly search in Rutstroemiaceae further.