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24-03-2026 11:58

Una para ID
Castillo Joseba Castillo Joseba

Me mandan el material de Galicia, recolectado en c

23-03-2026 20:16

Coprotus 210226 315
Miguel Ãngel Ribes Miguel Ángel Ribes

Good eveningI'm unable to identify this Coprotus o

21-03-2026 15:13

MYXOMYCETICOLOUS FUNGI
Lepista Zacarias

Hello everyone, Does any one know of any literatu

23-03-2026 13:24

Literature search
Paul Cannon

Could anyone provide me with a pdf of Auerswald's

20-10-2017 09:23

Hymenoscyphus ¿calycinoides?
Garcia Susana

Este otro crecía en el mismo trocito de madera qu

21-03-2026 22:59

Hysteriaceae ??
Petr Soucek

Good evening, I would appreciate some advice on th

20-03-2026 12:53

Eutypa spec. (?)
Stefan Blaser

Hello everybody, In the field, from distance, my

20-03-2026 16:16

Pseudomassaria-like on Cornus alba
Edvin Johannesen Edvin Johannesen

These 0.5 mm diam. acervuli were breaking through

19-03-2026 19:34

Xylariaceae? on Carpinus betulus wood
Filip Fuljer Filip Fuljer

Hello everyone,a few days ago I collected this str

19-03-2026 18:25

Myriosclerotinia curreyana?
William Slosse William Slosse

Good evening everyone, On 18/03/26 I found a few

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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 ;-)