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18-05-2026 19:49

Acrodontium sp?
William Slosse William Slosse

Good evening all,recently I found a portion of a S

18-05-2026 12:43

Hymenoscyphus fraxineus
Sylvie Le Goff

Bonjour à tousPuis je avoir votre aide sur ce que

18-05-2026 10:13

Teleomorph of Botrytis cinerea?
Lieve Deceuninck Lieve Deceuninck

Dear forum members,I identified this as the teleom

17-05-2026 22:09

Mollisia sp
éric ROMERO éric ROMERO

Bonjour tous, Je sollicite vos avis pour ce Molli

17-05-2026 19:05

Coenogonium pineti
Thomas Flammer

I have found this tiny 200 ym cup shaped apothecia

17-05-2026 16:41

Lachnum
Margot en Geert Vullings

We found this Lachnum on an old Rubus stem.Fruitbo

05-04-2026 22:46

blue mould from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

on wood of Ceratonia, Algarve, 3.4.2026.The color

15-05-2026 13:33

Cistella geelmuydenii cf
Sylvie Le Goff

Bonjour à tousJe serais très reconnaissante enve

16-03-2011 14:31

Peziza cf ampelina
roman vargas alberto

Hi. I would like some opinion about this Peziza

14-05-2026 05:36

Lachnum subvirgineum (?)
Ethan Crenson

Hi all,  I haven't paid much attention to Lachnu

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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).