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Bometon Javier Bometon Javier

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Simon Gurtner Simon Gurtner

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Dear Forum,On naked wood of Fagus, I found some ha

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Castillo Joseba Castillo Joseba

me mandan elmaterial seco de Galicia,  recolectad

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Michel RIMBAUD

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Alain GARDIENNET Alain GARDIENNET

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Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia,  recolecta

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Lothar Krieglsteiner Lothar Krieglsteiner

this fluffy anamorph was repeatedly found on decid

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Minute pyrenomycete on Olea leaves
Hans-Otto Baral, 12-02-2009 22:01
Hans-Otto BaralToday I received from Pablo fresh Lambertella on Olea leaves, and during study I discovered a very small pyrenomycete. Any idea?

Perith. 70 µm diam, globose, black, with some dark brown short stiff setae around the ostiole which I did not see. Asci *14-19 x 7.7-8.5 µm, 8sp., hardly any vacuole water around, IKI-, thin-walled all over (also in dead state). Sp. *7.5-9 x 2.3-2.5 µm, 1-septate, eguttulate.

Zotto
  • message #6664
Hans-Otto Baral, 12-02-2009 22:02
Hans-Otto Baral
Re:Minute pyrenomycete on Olea leaves
squashed perithecium
  • message #6665
Hans-Otto Baral, 12-02-2009 22:03
Hans-Otto Baral
Re:Minute pyrenomycete on Olea leaves
3 apparently living and one dead ascus. Spores appear to slip out of a sheath.
  • message #6666
Jean-Pierre Lafont, 13-02-2009 00:12
Re:Minute pyrenomycete on Olea leaves
Hello Zotto
Were the ascomas surrounded by spots of a black powdery coating? Actually it looks like a "sooty mould". The size of the ascostromata , the 1-septate hyaline ascospopres and the presence of hyphal appendages are suggestive of family Antennulariellaceae. Usually, in mature ascospores, one of the sister cells is broader than the other one, which seems to be the case for at least one of the spores of your Figure 3. Unfortunately, the literature on this group is scarce, dated and difficult to find. See Hughes, 1976, Mycologia LXVIII, 693-821. I am anything but an expert of this group, and this is only a suggestion...
Sincerely
Jean-Pierre
Hans-Otto Baral, 13-02-2009 00:25
Hans-Otto Baral
Re:Minute pyrenomycete on Olea leaves
Dear Jean-Pierre

The Antennulariellaceae, hug, belong in the Capnodiales, Dothideomycetes, according to Eriksson's Outline of genera. I know quite well the fact that species with bitunicate asci often have such asymmetrical spores with the upper cell broader. But here I had the feeling they are very much equal, and the asci are really thin-walled. Maybe the one spore looks asymmetrical because it lies oblique and is only partly sharp. But let us see the opinion of others.

thanks
Zotto