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27-11-2017 17:09

Stephen Martin Stephen Martin

Dear friends, I have come across what I believed t

27-11-2017 14:52

Edmond POINTE Edmond POINTE

Bonjour,récolté sur mousse en milieu humide, apo

30-07-2017 16:28

Elisabeth Stöckli

Bonjour, Trouvé au sol sur branches décortiqué

23-11-2017 13:36

Valencia Lopez Francisco Javier

Hola a todosHace unos días recolecte estas escler

13-10-2017 11:28

Malcolm  Greaves Malcolm Greaves

I would have recorded these as Microglossum olivac

25-11-2017 16:06

Yves Deneyer Yves Deneyer

Bonjour à tous,Récolté sur crottes de lapin mis

24-11-2017 19:56

Chris Yeates Chris Yeates

Bonsoir tousThis was found on corticated attached

24-11-2017 23:44

Lefèvre Lefèvre Lefèvre Lefèvre

Je retrouve ces photos d 'un champi resté sans no

24-11-2017 16:11

Gilbert MOYNE

Bonjour,Voici une petite espèce qui me pose encor

23-11-2017 17:12

Malcolm  Greaves Malcolm Greaves

I took a sample of wood from a rotten stump with S

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Gelatinous hyaline discs (Exidia ?)
Stephen Martin, 27-11-2017 17:09
Stephen MartinDear 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, 27-11-2017 18:17
Stephen Martin
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, 27-11-2017 18:50
Stephen Martin
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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