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27-04-2026 20:52

Mollisia or related genus from Portugal - with quite peculiar character
Lothar Krieglsteiner Lothar Krieglsteiner

Found on hanging tiwg of Olea europaea in dried-ou

27-04-2026 18:48

Micropodia pteridina?
Tony Moverley

Collected 23rd April 2026, Norfolk, EnglandSwarms

27-04-2026 17:41

another anamorph on monocotyleous remains from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, same leaf than the last post. The con

27-04-2026 18:05

bright green minute anamorph on Citrus aurantius-twig from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

... still attached at standing tree. The green con

27-04-2026 17:16

anamorph on monocotyleous leaves from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, moist lying.The conidiomata look like

27-04-2026 12:54

Spiral conidial crust
Steve Clements

Bonjour. Ce petit champignon blanc résupiné et

27-04-2026 09:59

Microdiplodia henningsii
Pauline. Penna

Bonjour Can anyone advise me on these pycnidia fo

26-04-2026 21:08

Ramularia sp ?
William Slosse William Slosse

Several species of Ramularia occur on Rumex that I

22-04-2026 20:54

Pyrenopeziza on monocot.
Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

25-04-2026 11:34

lachnum pudicellum
Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

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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).