01-02-2026 19:29
Nicolas Suberbielle
Bonjour, Marie-Rose D'Angelo (Société Mycologiq
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Michel Hairaud
Bonjour, Cette hypocreale parasite en nombre les
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Bernard CLESSE
Bonjour à toutes et tous,Pour cette récolte de 2
31-01-2026 09:17
Marc Detollenaere
Dear Forum,On decorticated wood of Castanea,I foun
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Francois Guay
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Zugna Marino
Buon giorno a tutti, ad un primo momento, non ess
29-01-2026 10:04
Jean-Paul Priou
Bonjour à tous, Marcel LECOMTE président de L'A
Hi there,
I am trying to identify a non-stromatic pyrenomycete growing on submerged wood in a small stream from Tyresta, south to Stockholm (Sweden). The are is granitic and the water was dystrophic.
The perithecia grow in small groups, semiimmersed or almost superficial. the venter globose-subglobose, 0.6-0.8 mm, black, with a short cylindrical neck, apparently smooth. Asci unitunicate, cylindrical, 8-spored, with a distinct apical annulus, inamyloid (tested in Melzer), 196-210 x 10-11 µm. Spores ellipsoid-fusiform, with abundant guttules, 3-septate, 25.5-28.5 x 8.5-9.5 µm. The perithecial wall is composed of several layers of subglobose cells.
I initially thought it might be a Chaetosphaeria, but the asci are inamyloid. Then I searched in Ceratosphaeria, and also Zignöella, but did not find any species that fit.
Any idea? Thanks in advance!
Cheers,
Ibai.
See towards Annulusmagnus triseptatus
Alain
Oh you were too fast Martin ! Grrrrr....
Thanks Martin and Alain! I had ruled out Annulatascaceae for some reason,but it fits A. triseptatus with no doubt.
I see now that there was a previous record of A. triseptatus from south Sweden.
Cheers,
Ibai.