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07-12-2009 23:43

Gernot Friebes

Hi, I am not sure whether this really is a Hyal

07-12-2009 16:02

Martin Bemmann Martin Bemmann

Hello, this very tiny discomycete is growing on

06-12-2009 20:21

Javier Ormad

Bonjour à tous! Je présente une possible Hymeno

06-12-2009 18:37

Alain BRISSARD

Bonsoir à tous Votre avis me sera d'un bon recou

04-12-2009 00:22

Pascal Ducos

Bonjour, j'ai trouvé ce champignon en zone de le

03-12-2009 18:54

Uwe Lindemann Uwe Lindemann

Hello Forum, recently Dirk and I found a little

02-12-2009 00:26

Yannick Mourgues Yannick Mourgues

Bonsoir à tous. Christian, Alain, A Bèze (2

29-11-2009 18:48

Gernot Friebes

here is the third, new Orbilia of the Rosa-branch

29-11-2009 12:59

Gernot Friebes

here is the second one, which looks very interesti

29-11-2009 12:48

Gernot Friebes

Hi, I found these two Orbilia on a dead, still

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Hyalopeziza?
Gernot Friebes, 07-12-2009 23:43
Hi,

I am not sure whether this really is a Hyalopeziza or another genus with glassy hairs but to me Hyalopeziza fits best.
It grew on very rotten, wet wood, soc. Lasiosphaeria hirsuta, Bulbillomyces farinosus and Trichophaeopsis latispora. The spores are 7-8 x 2,5-3 µm, the asci IKI bb, croziers +, the hairs throughout thickwalled and up to 75 µm long, not dissolving in 5% KOH.

Best wishes,

Gernot
  • message #9729
Gernot Friebes, 07-12-2009 23:44
Re:Hyalopeziza?
micros
  • message #9730
Gernot Friebes, 07-12-2009 23:44
Re:Hyalopeziza?
hairs
  • message #9731
Stip Helleman, 08-12-2009 00:05
Stip Helleman
Re:Hyalopeziza?
Hi Gernot,
I would say Hyalopeziza too, but the species is unknown to me.
Stip
Gernot Friebes, 08-12-2009 00:19
Re:Hyalopeziza?
Thank you Stip! I'm happy you agree with the genus!

Best wishes,

Gernot
Hans-Otto Baral, 08-12-2009 13:40
Hans-Otto Baral
Re:Hyalopeziza?
Hi Gernot

this find would be worth to be described more detailed. Ascus size, hair size (incl. width). Have you the hairs in higher resolution? They look as getting more thin-walled near the apex. Also a section of the urceolate apo would be good.

Above all: the species looks like an Urcolella. I somewhat doubt the value of the KOH-solubility as a generic character. Anyhow, sometimes the hair glassiness in Urceolella dissolves only when shortly heating the KOH slide (until it boils). If then still KOH-inert, I suspect that most species described in Urceolella cannot be consiered.

With Raitviir 2005 I did not arrive at a result.

Zotto
Gernot Friebes, 08-12-2009 17:01
Re:Hyalopeziza?
Hi Zotto,

you know, as a student I have saturday for collecting fungi and sunday for determining them and that's not enough time for all special measurements, sections, etc. But of course I'll try to look for these characters when they are needed!

Here I have now new data: the hairs are 52-75(98) x 3,5 µm, curved (c-shaped), throughout thickwalled except for the apex, where the wall is a bit thinner. The asci are 51-60,5 x 8-8,5 µm.

Best wishes,

Gernot

  • message #9745
Gernot Friebes, 08-12-2009 17:01
Re:Hyalopeziza?
micros
  • message #9746
Gernot Friebes, 08-12-2009 17:02
Re:Hyalopeziza?
section
  • message #9747
Gernot Friebes, 08-12-2009 17:02
Re:Hyalopeziza?
hairs
  • message #9748
Hans-Otto Baral, 08-12-2009 22:16
Hans-Otto Baral
Re:Hyalopeziza?
Wonderful your section! So deeply urceolate, like Olla scrupulosa, or Urceolella carestiana. The hairs look very similar to Urceolella salicicola/graddonii (now U. hirta). In this species glassiness becomes very indistinct in 5% KOH.

The spores are egttulate and slightly smaller
  • message #9751
Hans-Otto Baral, 08-12-2009 22:17
Hans-Otto Baral
Re:Hyalopeziza?
But this species grows on leaves and the apos are not at all urceolate.
  • message #9752
Gernot Friebes, 09-12-2009 22:42
Re:Hyalopeziza?
Hi Zotto,

the hairs look similar but the spores and the apothecia are quite different, as you wrote. Well, I guess both this find and the mollisoid fungus will stay undetermined ascomycetes, I am used to it :-/

Best wishes,

Gernot
Hans-Otto Baral, 09-12-2009 22:46
Hans-Otto Baral
Re:Hyalopeziza?
But please do the KOH test with heating, I am curious about the result.

Zotto
Gernot Friebes, 09-12-2009 22:50
Re:Hyalopeziza?
ok, I will try it! Fortunately there are enough apothecia left.

Gernot Friebes, 11-12-2009 16:44
Re:Hyalopeziza?
Hi Zotto,

I put a piece of an apothecium in KOH 5%, heated it and the hairs were gone! Have a look at the picture, there is just the excipulum left.

Best wishes,

Gernot
  • message #9785
Hans-Otto Baral, 11-12-2009 18:14
Hans-Otto Baral
Re:Hyalopeziza?
So we can safely say that it is an Urceolella.

Gernot Friebes, 11-12-2009 19:19
Re:Hyalopeziza?
thank you! You are a great help.