Accès membres

Mot de passe perdu? S'inscrire

11-06-2026 19:03

IMPORTANT >> MAINTENANCE 15-06
Nicolas VAN VOOREN Nicolas VAN VOOREN

Chers membres d'Ascofrance,Le site sera placé en

11-06-2026 19:01

Spinellus-like fungus on Scathophaga stercoraria
William Slosse William Slosse

Hello all,In an attempt to make a culture of a sus

10-06-2026 23:08

Mollisia nervicola ?
éric ROMERO éric ROMERO

Bonjour tous, Je vous propose un Mollisia trouvé

11-06-2026 16:24

Orbilia
Ethan Crenson

Hi all, Recently, a friend found this Orbilia in

09-06-2026 18:32

Vibrisseaceae(?) sur phragmites
Camille Mertens

Sur morceau de roseau immergé 0,5 - 0,7 mm de dia

10-06-2026 12:54

A dematiaceous hyphomycete on Filipendula
Steve Clements

Bonjour encore, Pouvez-vous m'aider, s'il vous pl

10-06-2026 21:16

Ascomycète stipité sp. sur Filipendula ulmaria
François Freléchoux François Freléchoux

Bonsoir,Le dernier du jour, en attendant votre avi

10-06-2026 21:07

Pyrénomycète ? sur Gentiana lutea
François Freléchoux François Freléchoux

Toutes les tiges de gentianes jaunes de l'an passÃ

10-06-2026 13:41

Ascomycète sp. sur Gentiana lutea
François Freléchoux François Freléchoux

Bonjour à nouveau, Voici une trouvaille d'hier.

10-06-2026 11:53

Lachnum nudipes on Meadowsweet
Steve Clements

Bonjour, This disco is abundant on dead stems of

« < 1 2 3 4 5 > »
Orbilia on Celtis occidentalis
Khomenko Igor, 18-03-2026 13:09
Khomenko IgorI recently examined Celtis occidentalis branches and found two species of Orbilia.

One 16-spored species that remind me O. serpentina.
https://www.inaturalist.org/observations/342789668


The second probably 32-spored species that looks like O. palmicola.
https://www.inaturalist.org/observations/342772630


My location (I'm in Ottawa, ON Canada) suggests that there are something else. Maybe I missed something. I'm asking for the opinion.

Hans-Otto Baral, 18-03-2026 16:09
Hans-Otto Baral
Re : Orbilia on Celtis occidentalis
Hi Igor

these are wonderful docus! I agree with both, my memory and comparison with the images leave no other option. O. palmicola is especially interesting as we had only one collection. I am quite sure that you would see a relatively thin apical thickening with ocular chamber in dead asci. The SBs are a little longer and narrower, I measured from your scale 1.5-2.5 x 0.8-1.1 µm.

Zotto
Khomenko Igor, 18-03-2026 22:23
Khomenko Igor
Re : Orbilia on Celtis occidentalis
Thank you Zotto.

I checked Orbilia palmicola like species. I belive that I see thin apical thickening in asci in KOH (attached image).
For SBs, I'm getting the same size as you got.
*(1.2) 1.5 - 2.4 (2.7) × (0.8) 0.9 - 1.1 (1.2) µm
Q = (1.3) 1.6 - 2.5 (2.7) ; N = 32
Me = 2 × 1 µm ; Qe = 2

Igor
  • message #84847
Hans-Otto Baral, 19-03-2026 08:39
Hans-Otto Baral
Re : Orbilia on Celtis occidentalis
Yes, very thin "thickening". You have no possibility to give for sequencing?  Our collection was too old for this. It would be interesting to know how close it is to the 16-spored O. pleioaustraliensis.
Khomenko Igor, 19-03-2026 15:11
Khomenko Igor
Re : Orbilia on Celtis occidentalis
No, I don't have access to sequencing right now, but maybe later François Guay can do it for me. He sequenced a few of my last year's collections. Including species on Equisetum that I've asked you about (?Stamnaria roseocarnea and Stamnaria mougeotii).