
16-07-2025 17:34

Hello,I have trouble distinguishing above mention

14-07-2025 11:20

Bonjour, Voici une espèce de (?) Hyaloscyphace

16-01-2023 21:31

Hello, Nearby the find of Calycina claroflava on

14-07-2025 17:55
Yanick BOULANGERBonjourAutre dossier laissé en suspendJe viens de

14-07-2025 11:17
Yanick BOULANGERBonjourJ'ai un dossier Jackrogersella qui est rest

14-07-2025 15:52
Gernot FriebesHi,I wanted to share this collection on Rubus idae

14-07-2025 13:37
Gernot FriebesHi,do you think this collection could be R. ulmari
Help with a black discomycete
Josep Torres,
20-04-2024 09:56
A few apothecia collected on Sunday, April 7, under beech and oak trees, on the stripped surface of a trunk lying on the ground, sharing space with what appears to be Orbilia eucalypti.
Ascomas in the form of black grains of about 0.7 mm. in diameter, little rooted in the substrate.
Hyphae of the excipule angular, more or less rectangular, strongly pigmented.
Octosporic asci, apparently bitunicate, with measurements of (75.8) 78.9 - 96.8 (101.9) × (11) 11.1 - 14.4 (16.1) µm. with an average of Me = 89 × 12.9 µm., without any considerable reaction to Lugol.
Interascal matter like a paraphysis, filiform, with a width of just 1 µm, with a dark amorphous substance at the apex and protruding slightly above the level of the asci.
Free ascospores scarce in the samples, these ascospores between fusiform and moriform, with a somewhat more pointed end, with 8 to 10 transverse septa and some longitudinal septa, with measurements of 15.1 - 21.1 × 4.8 - 5.4 µm.
Any suggestion from you will be welcome.
Thank you very much in advance.
Kind regards.
Hans-Otto Baral,
20-04-2024 11:20

Re : Help with a black discomycete
The asci are not really bitunicate like in Patellaria, the wall is too thin. But this is gradual.
Should be Vexillomyces (formerly Claussenomyces) atrovirens or something closely related. The ascoconidia finally form balls around the spores (upper ascus in your first ascus photo) and are ellipsoid.
Josep Torres,
20-04-2024 14:17
Re : Help with a black discomycete
Thanks Zotto.
I didn't know about the ascoconidia balls, and it does fit perfectly with the bibliography that I have been able to consult on Vexillomyces atrovirens.
Vexillomyces atrovirens sl. is therefore very likely.
Again, thank you very much.
Kind regards.
I didn't know about the ascoconidia balls, and it does fit perfectly with the bibliography that I have been able to consult on Vexillomyces atrovirens.
Vexillomyces atrovirens sl. is therefore very likely.
Again, thank you very much.
Kind regards.