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03-09-2025 12:44

Enrique Rubio Enrique Rubio

Hi to somebody.I would like to know your opinion o

03-09-2025 21:59

Philippe PELLICIER

La Léchère, Col de la Madeleine, alt 1970m, au s

02-09-2025 10:28

Castillo Joseba Castillo Joseba

De ayer en madera muy podrida de haya (Fagus)A ver

31-08-2025 19:41

Enrique Rubio Enrique Rubio

Hi to someone.I need to download this issue of Sve

02-09-2025 11:34

Thomas Læssøe

https://svampe.databasen.org/observations/10527903

31-08-2025 17:32

Michel Hairaud Michel Hairaud

Bonjour, Pas d'identité trouvée pour cette réc

01-09-2025 08:42

François Corhay

Un ami, conservateur d'une RN en Belgique, m'a adr

31-08-2025 14:34

Thomas Flammer

I have found a Rutstroemia on abt. 2000 m on Alnus

29-08-2025 19:04

Thomas Flammer

Spores 21.2 - 26.2 x 8.3 - 11.3 µm - Q: 2.20 - 2.

30-08-2025 18:29

Joaquin Martin

Hi,I found this undetermined ascomycete on broadle

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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