10-06-2026 11:53
Steve ClementsBonjour, This disco is abundant on dead stems of
10-06-2026 10:45
François Freléchoux
Bonjour à nouveau, Encore une détermination qui
08-06-2026 10:16
Spooren Marco
I don`t have a clou about this fungus,it is not in
10-06-2026 09:24
François Freléchoux
Bonjour, J'imagine que cette détermination ne do
09-06-2026 18:32
Camille MertensSur morceau de roseau immergé 0,5 - 0,7 mm de dia
08-06-2026 17:00
François BartholomeeusenGood day everyone, On June 5 2026, I collected de
07-06-2026 15:10
William Slosse
Hello everyone,On 05-06-26, I found following asco
05-06-2026 11:02
Thomas Læssøehttps://svampe.databasen.org/observations/10596691
07-06-2026 12:09
François Freléchoux
Bonjour, Voici une brève description de ce qui m
Minute pyrenomycete on Olea leaves
Hans-Otto Baral,
12-02-2009 22:01
Today 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
Hans-Otto Baral,
12-02-2009 22:02
Re:Minute pyrenomycete on Olea leaves
squashed perithecium
Hans-Otto Baral,
12-02-2009 22:03
Re:Minute pyrenomycete on Olea leaves
3 apparently living and one dead ascus. Spores appear to slip out of a sheath.
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
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
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
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