27-01-2017 18:36
François BartholomeeusenHi forummembers,Found on a fallen branch of oak. T
27-01-2017 23:35
Lepista ZacariasHi everyone,In May last year I post a topic with s
27-01-2017 17:55
Enrique Rubio
Hi againCould this fungus be simply Nectria cinnab
27-01-2017 10:30
Castillo Joseba
me mandan el material desde Galicia (España) No
27-01-2017 10:37
Castillo Joseba
Me mandan el material desde Galicia (España)A ver
24-01-2017 23:00
Matthias Mann
Dear Forum!First tiny white dots on Quercus-wood a
25-01-2017 19:05
Enrique Rubio
Hi again I need your ideas for to identify this s
25-01-2017 13:15
Francisco SÁNCHEZ
Crecían este domingo sobre madera descompuesta de
25-01-2017 12:02
Castillo Joseba
En rama de adelfa, en forma de pelusa negraAlgu
Found on a fallen branch of oak. The wood is colored black and the stromata has a stipe of 8x1 mm and a fertile part of 11x2.5 mm. The outer crust is hard and black with grey patches and lumpy as a result of the underlying perithecia.
TELEMORPHE:
Perithecia: subglobose 514 x 400 µm
Asci: cylindrical 124-158 x 8-9,65 µm
Paraphyses: filiform
Spores: 11,35-13,37 x 5,14-5,94 µm Q= 2.23 with straight germsplit (spore lenght 11.2 µm with germsplit length 7.85 µm)
ANAMORPHE: flat length 5-8 mm; conidia:10,41-16,3 x 3,02-3,86 µm
Macroscopic/microscopic this frb looks like Xylaria arbusula except the length of the asci is wrong and I found it in Belgium/Turnhout in winter! Is this not a tropical asco?
I will be grateful for your help!
Greetings,
François Bartholomeeusen
your images do not allow an identification.
Before considering X. arbuscula you should rule out X. hypoxylon. The key feature distinguish them is the thickness and texture of the outer crust. See my notes in the monographic keys available on Ascofrance.
Good luck,
Jacques
I have made the wrong choice at step 2 of your superb key. I chose "Stromata hard-textured with a carbonaceous outer crust".
Perhaps the persistent, drying east wind, the sun and the freezing temperature changed the texture a bit? In all cases reading your notes has shed light on my problems. I have also measured the out crust and is was about 40-45 µm thick.
Thank you for your quick reaction!
Cordial greetings,
François