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Mot de passe perdu? S'inscrire

12-11-2025 21:47

sp en restos de poda
ruiz Jose

Hola a todos, me envían esta colección en resto

12-11-2025 09:25

Pseudombrophila on soil
Viktorie Halasu Viktorie Halasu

Hello, I need help with a pale terrestric Pseudom

11-11-2025 20:16

yellow discs on a Quercus robur leaf
Bohan Jia

Hi, lastly I have found these tiny yellow decayin

09-11-2025 13:20

Ascomycete on Rubus.
Josep Torres Josep Torres

Hello.A tiny ascomycete, appearing as erupting gra

08-11-2025 12:10

Phacidium
Elisabeth Stöckli

Bonjour, Trouvé sur tiges mortes de Rubus (ronce

08-11-2025 00:29

Allophylaria subliciformis?
Francois Guay Francois Guay

I found this species in Quebec, Canada, on herbace

04-11-2025 14:53

Leptosphaeria?
Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

08-11-2025 09:15

Mollisia sur Pinus
Michel Hairaud Michel Hairaud

Bonjour, Pouvez vous m'aider à identifier ce Mol

06-11-2025 16:50

Hymenoscyphus sp?
Rot Bojan

Hello! Yesterday I found a fungus on or near a nee

05-11-2025 11:33

Cladosporium ?
Pierre Repellin

Bonjpur,J'ai trouvé, sur une hampe florale d'Alli

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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 ;-)