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21-03-2026 22:59

Petr Soucek

Good evening, I would appreciate some advice on th

21-03-2026 15:13

Lepista Zacarias

Hello everyone, Does any one know of any literatu

20-03-2026 12:53

Stefan Blaser

Hello everybody, In the field, from distance, my

20-10-2017 09:23

Garcia Susana

Este otro crecía en el mismo trocito de madera qu

20-03-2026 16:16

Edvin Johannesen Edvin Johannesen

These 0.5 mm diam. acervuli were breaking through

19-03-2026 19:34

Filip Fuljer Filip Fuljer

Hello everyone,a few days ago I collected this str

19-03-2026 18:25

William Slosse William Slosse

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

17-03-2026 10:09

François Freléchoux François Freléchoux

Bonjour, Voici la description rapide d'un petit d

19-03-2026 15:58

Stefan Blaser

Hello everybody, I hope for some hints... Macro:

19-03-2026 17:50

Enrique Rubio Enrique Rubio

Hi to everybodyThese thiny, blackish pseudothecia

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Gelatinous hyaline discs (Exidia ?)
Stephen Martin Mifsud, 27-11-2017 17:09
Stephen Martin MifsudDear friends, I have come across what I believed to be an ascocarp but after microscopical investigations, I don't what it is composed of!!!


The bodies were jelly-like and very difficult to slice, hyaline or slightly pulverous above, astipitate, cushion-like bodies sitting on the surface of a decaying twig, sometimes coalescing to form colonies. Some individuals had a pale ochraceous granule at the centre which under the microscope seems to be abiotic and disintegrate into amorphous particles 

When finally I sliced a section, I could see a meshwork of numerous 'hyphae' without any special reproductive organs. No spores could be detected.

Is it an Exidia?


Sliced section shows a central amorphous body suspended in a loose gelatinous tissue composed of loose hyphae in a meshwork network (very thin - 1um ) and an outer layer made up of a different  denser tissue, but without any special organs (eg asci) 

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Lothar Krieglsteiner, 27-11-2017 17:13
Lothar Krieglsteiner
Re : Gelatinous hyaline discs (Exidia ?)

Hello Stephen,


although the micros are very small, I am quite sure that your fungus is not an ascomycete but a Heterobasidiomycete.


Best regards, Lothar

Chris Yeates, 27-11-2017 17:30
Chris Yeates
Re : Gelatinous hyaline discs (Exidia ?)
I'm sure Lothar is correct. I would suggest Exidia nucleata.  Microscopy would confirm it but there appear to be white Calcium oxalate inclusions.
amitiés
Chris
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Stephen Martin Mifsud, 27-11-2017 18:17
Stephen Martin Mifsud
Re : Gelatinous hyaline discs (Exidia ?)


Dear friends,

I agree perfectly - I just examined better the slide and although I could not see the spectacular basidia of this genus,  there are 'basidioles' which are matching with those of Exidia sp.  The central calcium oxalate deposit is typical of Exidia nucleata:

http://cemachampi.blogs.sudouest.fr/archive/2014/02/20/etude-exidia-nucleata-une-exidie-a-concretions-d-oxalate-de-1017337.html

I washed the specimen in KOH and maybe I washed away the spores from the surface. I'll prepare a slide from a raw specimen. COOL!
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Stephen Martin Mifsud, 27-11-2017 18:50
Stephen Martin Mifsud
Re : Gelatinous hyaline discs (Exidia ?)
Basidia found , Exidia 100% confirmed, probably E. nucleata because of the Calcium oxalate  amorphous granule at the centre of the basidiocarp.

Spores (or conidia?) also observed.
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