26-11-2025 18:13
Jason Karakehian
The entire run of Mycotaxon is now available throu
25-11-2025 14:24
Thomas Læssøehttps://svampe.databasen.org/observations/10490522
25-11-2025 11:03
Mick PeerdemanHi all,One of my earliest microscopy attempts, so
24-11-2025 15:23
Arnold BüschlenHallo, auf einer offenen Kiesfläche am Rande ein
23-11-2025 11:16
Bohan JiaHi, I found small discs growing on dead stem of
21-11-2025 10:56
Christopher Engelhardt
Very small (~0,5 mm) white ascos, found yesterday
what do you thing about Daldinia cf. fissa ?
Regards
Pavol
p.s.
On death standing tree (Alnus glutinosa)
Fruitbody: max. 50 x 40 x 40 mm
The white line on cut max. diam 1 mm
The perithecia 800-1000 x 300-400 µm
The asci are 8 spores 150-250 x 9 µm
The apical ring 3-4 x 0,5-1 µm ( in Melzer = blue )
The ascospores (12)14-15(16) x 6-7 µm
In 10% KOH pigment is purple / violaceous
A polyphasic taxonomy of Daldinia (Xylariaceae)
http://www.studiesinmycology.org/content/77/1/1.full
this is most likely D. petriniae, at least a member of the complex of closely related species. I was not aware it occured as early as mid June at ascigerous state.
D. vernicosa has a gelatinous interior that turns hollow and differently shaped and darker ascospores.
Cheers,
Jacques
Thank you very much
Pavol