05-07-2025 12:38
Åge OterhalsI found this pyrenomycetous fungi in pine forest o
04-07-2025 20:12
Josep Torres
Hello.A fungus growing on the surface of a trunk o
20-06-2025 08:33
Josep Torres
Hello.Small, blackish, mucronated surface grains s
28-06-2025 16:00
Josep Torres
Hello.A tiny fungus shaped like globose black grai
04-07-2025 12:43
Castillo Joseba
me mandan el material seco de Galicia (España)
03-07-2025 18:40
Castillo Joseba
me mandas el material seco de Galicia (España) re
03-07-2025 20:08
Francois Guay
I found this interesting yellowish asco growing on
01-07-2025 23:37
Josep Torres
Hello.A Pleosporal symbiotic organism located and
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?
Lothar Krieglsteiner,
20-06-2019 18:02
Orbilia delicatula
... as far as the name ist still current (former xanthostigma).
Best, Lothar
Hans-Otto Baral,
20-06-2019 20:47
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
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
Re : Orange discs... Orbilia?
Wel, reniform, cashew-shaped, or even allantoid, why not.
Martin Bemmann,
20-06-2019 22:37
Re : Orange discs... Orbilia?
or "comma shaped" as in archaeology:
;-)
Martin
Hans-Otto Baral,
20-06-2019 22:42
Re : Orange discs... Orbilia?
and yes, crescent is another word for this.
Chris Yeates,
21-06-2019 21:43
Re : Orange discs... Orbilia?
Hörnchen - but not squirrel-shaped ;-)