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06-09-2007 22:34

Hans-Otto Baral Hans-Otto Baral

Bon jour on a branch of a broad-leaved, Ficus-l

04-09-2007 21:16

NC NC

Bonsoir à tous, Sur une branche de Quercus, des

03-09-2007 23:06

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonsoir. Je vous soumets une récolte effectuée

03-09-2007 18:23

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour. Je récolte, depuis cette année, dans u

02-09-2007 15:27

Alain GARDIENNET Alain GARDIENNET

Bonjour, J'aurais à nouveau besoin qu'on me val

01-09-2007 21:51

Hans-Otto Baral Hans-Otto Baral

Has anybody an idea about the species or at least

29-08-2007 23:39

Alain GARDIENNET Alain GARDIENNET

C'est encore moi J'avais déjà eu un problème a

29-08-2007 23:25

Alain GARDIENNET Alain GARDIENNET

Bonsoir, Cet asco se trouvait sur branche décor

29-08-2007 17:47

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour. Encore un petit problème de déterminat

25-08-2007 10:26

Alain GARDIENNET Alain GARDIENNET

Le second possède des spores (ou conidies ? idem

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Biscognauxia? from Australia
Hans-Otto Baral, 06-09-2007 22:34
Hans-Otto BaralBon jour

on a branch of a broad-leaved, Ficus-like tree in NE-Australia grew in association with Orbilia aff. vinosa a quite banal looking Xylariales resembling a Biscognauxia. The spores seem, however, unusual in their one end being distinctly truncate. Has anybody an idea what genus and perhaps species this is?

data: Sp. 9.5-12.5 x (5.3-)5.7-6 µm. Stroma 7-23 x 5-12 mm, 0.8 mm thick. HB 8609b.

Zotto
  • message #3035
Hans-Otto Baral, 06-09-2007 22:36
Hans-Otto Baral
Re:Biscognauxia? from Australia
in section
  • message #3036
Hans-Otto Baral, 06-09-2007 22:36
Hans-Otto Baral
Re:Biscognauxia? from Australia
in Lugol
  • message #3037
Jacques Fournier, 20-09-2007 09:06
Jacques Fournier
Re:Biscognauxia? from Australia
Hi Zotto,
sorry for the delay, I was off when you sent your message.
I agree it is likely a Biscogniauxia. In this genus several species have two-celled ascospores, a big brown one, bearing a germ slit, and a small hyaline one which usually collapses with time and leaves a truncate end. This can be seen in Xylaria, Anthostomella and Nemania too. One of the ascospores on your photo still has its dwarf cell, quarter SE
Your taxon would need further data to be safely identified. If the stroma does have punctate ostioles surrounded by a low rim and if ascospores have a long germ slit, it might be B. uniapiculata (Penz. & Sacc.) Whalley & Laessoe, a common pantropical species.
All my best,
Jacques
Hans-Otto Baral, 20-09-2007 16:42
Hans-Otto Baral
Re:Biscognauxia? from Australia
Hi Jacques

tnaks a lot, that helps. Yes, the spores have a long germ slit, visible at the lower right spore on my photo, here again. Now I believe the spores are originally 2-celled. The ostioles are simple minute craters, please see photo.
Zotto
  • message #3127
Hans-Otto Baral, 20-09-2007 16:43
Hans-Otto Baral
Re:Biscognauxia? from Australia
Here the osioles
  • message #3128