Accès membres

Mot de passe perdu? S'inscrire

19-02-2026 17:49

Salvador Emilio Jose

Hola buenas tardes!! Necesito ayuda para la ident

28-02-2026 11:05

Yanick BOULANGER

Bonjour à tousLe 24/02/2026 à Montmacq, devant m

03-03-2026 20:34

Miguel Ãngel Ribes Miguel Ángel Ribes

Good eveningThese small, amphora-shaped perithecia

28-02-2026 11:54

Alain GARDIENNET Alain GARDIENNET

Hi forum,Is anyone aware if the 1936 edition of Si

02-03-2026 22:07

Jorge Hernanz

Buenas noches!Entre musgos, bajo Pinus halepensis

01-03-2026 18:02

Francois Guay Francois Guay

I found this mystery Helotiales on an incubated le

28-02-2026 14:43

Alain GARDIENNET Alain GARDIENNET

A new refrence desired :Svanidze, T.V. (1984) Novy

01-03-2026 18:46

Robin Isaksson Robin Isaksson

Hi! This species i se from time to time in the

26-02-2026 22:06

Malcolm  Greaves Malcolm Greaves

Can someone explain the features that split Geoscy

27-02-2026 17:51

Michel Hairaud Michel Hairaud

Bonjour, Quelqu'un peut il me donner un conseil p

« < 1 2 3 4 5 > »
Minute bright yellow discomycete
Daniel Ghyselinck, 24-01-2012 20:29
Dear all,

I have collected last week this minute (max 0,4 mm) bright yellow discomycete on deciduous decorticated wood.
Paraphyses densely filled with yellow granules.
Spores about 20 – 26 x 4 – 4,5 µm, also with yellow granules, at maturity with 3 septum.
Ascus 8 spored, apex blue in IKI.

Thanks in advance for your suggestions.

Best regards,
Daniel
  • message #17189
  • message #17189
  • message #17189
Hans-Otto Baral, 24-01-2012 20:46
Hans-Otto Baral
Re : Minute bright yellow discomycete
Hi Daniel

I am very happy to see these splendid photos of living elements. This makes identification much easier and clear.

This is Calycellina ochracea, a curious species characterized by these refractive yellowish VBs in the paraphyses, in which it resembles Rodwayella citrinula.

The "granules" in the spores are oil drops. You can easily make the test: When you add KOH the spore guttules will resist but those in the Paraphyses will disappear. They are only seemingly similar.

If you have Cresyl blue you can colour the spore wall in deep lilac. The round conidia formed on the germinating spores are also typical.

The species is not frequent. I would be glad? when you can tell me the region where you collected it. No idea of the host tree?

Zotto
Gernot Friebes, 24-01-2012 20:48
Re : Minute bright yellow discomycete
Hi Daniel,

looks similar to Calycellina ochracea.

Best wishes,

Gernot

PS.: To slow :-(
Daniel Ghyselinck, 24-01-2012 20:56
Re : Minute bright yellow discomycete
Thanks a lot Zotto,

I will immediately make the test with KOH and Cresyl blue, and post the result on the forum.

It was collected in Belgium, Province Brabant Wallon, near Nivelles (Monstreux - Bois du Planti) on 15.01.2012.

Unfortunately no idea of the host, it was found by my wife (as usual, she founds everything !), in a pure deciduous mixed forest, and I just got a small piece of rather rotten wood.

Daniel
Daniel Ghyselinck, 24-01-2012 21:42
Re : Minute bright yellow discomycete
Hi Zotto and Gernot,

The VBs in the paraphyses effectively disappears in KOH, while the oil drops in the spores did not.

And the spores became deep lilac in Cresyl blue.

It's a very curious and interesting species, indeed !

Daniel
  • message #17193