Accès membres

Mot de passe perdu? S'inscrire

17-05-2024 16:25

Pavel Jiracek

Erioscyphella lunata, found on a fallen needle of

20-05-2024 21:28

Nihad Omerovic

Hello,Found this Orbilia on a dry, attached twig o

07-11-2018 08:34

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello, could someone send this publication to me

18-05-2024 10:47

Anna Klos

Goodmorning,We found this tiny ascomycete (max. 1m

25-03-2024 19:14

Juuso Äikäs

I found some small black pyrenos growing on a dead

14-04-2024 20:04

Manak Roman

Hi all,I have two very similar finding last weeken

10-05-2024 17:40

Anna Klos

Good afternoon, Thursday during an inventory we f

17-05-2024 15:17

éric ROMERO éric ROMERO

Bonjour, Un besoin d'aide pour ce Podospora (...?

29-01-2022 21:44

Jan Eckstein

Good evening, apothecia small, yellowish, 150-300

16-05-2024 11:19

Sylvie Le Goff

Bonjour, j'ai récolté sur une branchette de feui

« < 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