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12-11-2018 15:38

PASCAL DUBOC

Bonjour sur tige herbacée en milieu marécageux,

11-11-2018 13:43

BERNARD CLESSE BERNARD CLESSE

Bonjour à toutes et tous,Que pensez-vous de cet A

12-11-2018 15:56

Castillo Joseba Castillo Joseba

De esta mañana en suelo arenoso junto a pinar y c

11-11-2018 15:12

Castillo Joseba Castillo Joseba

Me mandan  esta muestra seca desde Galicia,   en

11-11-2018 19:33

Thorben Hülsewig

Hi there, today i found on stems of Eupatorium sp

08-10-2018 14:51

Edvin Johannesen Edvin Johannesen

I came across these dense mats of apothecia seated

11-11-2018 18:41

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour.Suite à la publication d'un article d'Eka

04-11-2018 12:06

Thorben Hülsewig

Hi there, two days ago i found this Hymenoscyphus

11-11-2018 14:33

Castillo Joseba Castillo Joseba

Me mandan esta muestra seca desde Galicia,   fue

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BERNARD CLESSE BERNARD CLESSE

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Niessliaceae?
Gernot Friebes, 06-01-2010 16:29
Hi,

here I have a pyrenomycet which grew on a branch of Juglans. The hyaline to slightly brownish hair are a very nice contrast to the black ascomata. Due to these hairs, the two-celled, hyaline spores and unitunicate asci I think it might be a Niessliaceae.

@Jacques: You sent me a paper about the Niessliaceae some time ago. Unfortunately I had problems with my computer and now the paper is gone, could you please send it to me again?

The spores are 18-24(27) x 7-8(19) µm, two-celled, verrucous, have a thick sheath and are hyaline or, when mature, slightly brownish. The Asci are 84-100 x 14-20 µm, 8-spored, clavate with a short stipe, sometimes thick-walled but unitunicate (they have an apical apparatus), IKI-. The hairs are 165-240 x 8-11 µm, hyaline but at the base sometimes reddish brown, thick-walled (walls ups to 3 µm thick), often breaking at the septa. I think there are some slimy, hardly visible paraphyses but I am not sure about this. The ascomata are ca. 450 µm in diameter.

Best wishes,

Gernot
  • message #9977
Gernot Friebes, 06-01-2010 16:30
Re:Niessliaceae?
micros 1 (spores and hairs)

Scale = 10 µm
  • message #9978
Gernot Friebes, 06-01-2010 16:31
Re:Niessliaceae?
micros 2 (asci and spores)

  • message #9979
Christian Lechat, 06-01-2010 17:09
Christian Lechat
Re:Niessliaceae?
Hi Gernot,
could you please to show us a vertical section of ascomatal wall?
Thank you
Jacques Fournier, 06-01-2010 17:35
Jacques Fournier
Re:Niessliaceae?
Hi Gernot,
I am sending you the pdf.
Yout fungus keys out to Circinoniesslia as closest match, but the only known species in that genus is tropical, fungicolous, and has much smaller ascomata with clearly strongly curved hairs.
Maybe Gary will have a better insight.
Best wishes,
Jacques
Gernot Friebes, 06-01-2010 21:15
Re:Niessliaceae?
Hi,

thank you for your answers!

@Jacques: Thanks in advance for the key. Seems to be another difficult pyrenomycet, hopefully Gary will read this thread.

@Christian: Here I have new pictures of a section, the wall and the ostiole. I hope it will help!

Best wishes,

Gernot
  • message #9993
Jacques Fournier, 06-01-2010 22:28
Jacques Fournier
Re:Niessliaceae?
the peridium appears to be fairly thick, which does not point towards Niessliaceae, neither the relatively large ascomata. No better idea for the moment!
Jacques
Alain GARDIENNET, 06-01-2010 22:52
Alain GARDIENNET
Re:Niessliaceae?
Dear Gernot,
Are you really sure that your asci are unitunicate ? Could you show better the apical apparatus, in red congo for example ?
Alain
Gernot Friebes, 06-01-2010 23:02
Re:Niessliaceae?
Hi Alain,

I found the apical apparatus as two parallel lines, see the photo. I can make more picture, if it is not clear.

Best wishes,

Gernot

  • message #9996
Jacques Fournier, 07-01-2010 09:07
Jacques Fournier
Re:Niessliaceae?
Hi Gernot,
I don't think asci are bitunicate, if yes they are very thin-walled. Not sure the rectangular structure at the apex is a ring. I agree with Alain you should try to stain the asci with Congo red or dilute blue ink. KOH is sometimes also a good option to make the ring more visible as refractive dots.
The morphology or absence of paraphyses is important to assess. Try on immature or hardly mature ascomata, mounting the hymenium in dilute India ink.
Gernot you are definitely very good at finding weird things!
Jacques
Alain GARDIENNET, 07-01-2010 09:12
Alain GARDIENNET
Re:Niessliaceae?
It's my idea too. I thought it was an Herpotrichiaceae.
Alain
Gernot Friebes, 07-01-2010 12:15
Re:Niessliaceae?
Hi,

I am thankful that you are so curious about my find! I tested younger ascomata and I think it is clear now that the asci are bitunicate. In addition, I think I could see some slimy paraphyses.

The material I tested first and which I show in my first posting was apparently overmarture, because there were hardly any young asci left. Besides, I found some younger spores in the new material which neither had a septa nor a sheath. With E. Müller/J.A. von Arx: Die Gattungen der didymosporen Pyrenomyceten my fungus key out to Herpotrichia, as Alain proposed. The suspense continues...

Best wishes,

Gernot

scale = 10 µm
  • message #10002
Gernot Friebes, 07-01-2010 12:17
Re:Niessliaceae?
By the way, the apex of mature asci really look as if there would be an apical apparatus, see the photo on the right. No wonder why I thought they were unitunicate at first, when there were nearly exclusively (over)mature asci...

  • message #10003
Jacques Fournier, 07-01-2010 14:20
Jacques Fournier
Re:Niessliaceae?
there is nothing in your photos much convincing about uni or bitunicate asci. Apical rings may occur in bitunicate asci, but rarely. Herpotrichia and related genera, as far as I know, are not setose, they just have hyphal appendages at sides and/or subiculum at base.
Can you send me a part of your specimen?
Thanks,
Jacques
Alain GARDIENNET, 07-01-2010 14:40
Alain GARDIENNET
Re:Niessliaceae?
Jacques, je sui au boulot mais de mémoire il me vient un genre dans les Herpotrichiaceae qui présente des ascomes poilus, je ne l'ai plus de mémoire (peut-être Acantho...machintruc...) .
Je regarderai dans mes docs ce soir.
Alain
Gernot Friebes, 07-01-2010 14:52
Re:Niessliaceae?
:@ I have no luck with pyrenomycetes

Of course I can send you some ascomata.

Best wishes,

Gernot
Alain GARDIENNET, 07-01-2010 15:58
Alain GARDIENNET
Re:Niessliaceae?
La mémoire me revient : le genre auquel je pensais est Acanthostigmella, qui est dans les Tubeufiaceae si je ne me trompe, mais ce ne doit pas être cela ici. Désolé.
Alain
Gernot Friebes, 15-01-2010 22:53
Re:Niessliaceae?
Hi Jacques,

I sent you a mail concerning your address, did you receive it?

Best wishes,

Gernot