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05-04-2026 22:46

blue mould from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

on wood of Ceratonia, Algarve, 3.4.2026.The color

05-04-2026 13:33

Mollisia sp?
Sylvie Le Goff

Bonjour à tousPuis avoir votre avis sur ce champi

05-04-2026 20:40

Unknown helotiales on Abies bark
Robin Isaksson Robin Isaksson

Hi!Found i Japan on bark of Abies sp. Spores 35-4

03-04-2026 17:11

Schizoxylon?
Bohan Jia

Lastly, I have found these small apothecia on a co

31-03-2026 21:18

Lambertella tetrica paper
Miguel Ãngel Ribes Miguel Ángel Ribes

Good evening. oes anyone have the original descrip

31-03-2026 20:57

"Nectria" - for a lack of better knowledge...
Stefan Blaser

Hello everybody, I hope somebody can help me with

26-03-2026 15:31

Hymenoscyphus ombrophiliformis?
Ãke Widgren Åke Widgren

Hello,I found this one in October last year, on r

31-03-2026 16:20

Helotiales from Tanzania
Mlcoch Patrik Mlcoch Patrik

Hello, Please about help with determination. On

31-03-2026 08:19

Daldinia childiae parasité
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

30-03-2026 12:18

Demande d'aide
Sylvie Le Goff

BonjourRécolté sur la base de Pteridium aquilinu

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Orange discs... Orbilia?
Juuso Äikäs, 20-06-2019 14:58
I found these in a small grove, growing on a fallen trunk of a deciduous tree (Alnus incana and Prunus padus were the dominant trees). I've seen some photos and microphotos of Orbilia species and there seem to be similarities, so that would be my uninformed guess.

The spores were tiny, allantoid, about 2.5 x 1 micrometers in size. Photographing was quite difficult as they were spinning in the liquid. The asci were ca. 30 x 3 ?m. Paraphyses mostly capitate, some filiform.

Any thoughts about the genus/species?
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Lothar Krieglsteiner, 20-06-2019 18:02
Lothar Krieglsteiner
Orbilia delicatula

... as far as the name ist still current (former xanthostigma).


Best, Lothar

Hans-Otto Baral, 20-06-2019 20:47
Hans-Otto Baral
Re : Orange discs... Orbilia?
We returned to O. xanthostigma by using O. leucostigma for the white taxon, as in old times. Within Europe it is easy to give these two names for the yellow and white populations. In both the curved spores are warted when looking with oil immersion. And they are not forms but very distant species.
Zotto
Juuso Äikäs, 20-06-2019 20:59
Re : Orange discs... Orbilia?
OK, so Orbilia xanthostigma it is then. And I guess the spores are reniform rather than allantoid. Thanks to both of you. A new genus and species for me!
Hans-Otto Baral, 20-06-2019 21:01
Hans-Otto Baral
Re : Orange discs... Orbilia?
Wel, reniform, cashew-shaped, or even allantoid, why not.
Martin Bemmann, 20-06-2019 22:37
Martin Bemmann
Re : Orange discs... Orbilia?
or "comma shaped" as in archaeology:


;-)

Martin
Hans-Otto Baral, 20-06-2019 22:42
Hans-Otto Baral
Re : Orange discs... Orbilia?
and yes, crescent is another word for this.
Chris Yeates, 21-06-2019 21:43
Chris Yeates
Re : Orange discs... Orbilia?
Hörnchen - but not squirrel-shaped ;-)