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07-03-2023 09:52

Dirk Gerstner

Hello all,I'm completely in the dark here. I would

02-03-2023 17:43

François Bartholomeeusen

Dear forum members, I must refer to Elisabeth StÃ

05-03-2023 21:15

ruiz Jose

Hola a todos. Recolectada en involucró de Castañ

04-03-2023 08:58

Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia (España) 

04-03-2023 19:20

Alex Akulov Alex Akulov

Dear colleaguesCan you help me with the identifica

03-03-2023 20:13

Stefan Jakobsson

On a branch of Quercus on the underside of loose b

25-02-2023 23:06

ruiz Jose

Hola a todos en excremento de cervido.No he podido

25-02-2023 18:36

Elisabeth Stöckli

Bonsoir, Trouvé sur un tronc de Salix recouvert

30-01-2017 18:26

Enrique Rubio Enrique Rubio

Hi againThese small (0.3-0.4 mm) narrowly sessile,

26-02-2023 22:13

Jorian Eijkelboom Jorian Eijkelboom

Found in the Netherlands (feb. 2023) on a leaf of

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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