
18-07-2025 23:03
Hello.Fruitings between 51 and 130 microns in tota

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
Our common friend P. Zapico has found at his home these gregarious, blackish, roundish, papillate and ostiolate, carbonaceous, perithecia 0.9-1.4 mm in diam. growing over on more or less persistent subiculum on very rotten wood of a cut Salix babylonica.
The asci are cylindrical, 8-spored, 155-170 x 8.5-9 microns, pars sporifera 110-138 with a conspicuous apical apparatus Melzer deep blue 5-6 x 4 micr.
The ascospores are ellipsoid, equilateral, brownish at maturity, with straight germ slit nearly as long as spore, situated on the more convex side, and 1(-2) semiglobose cellular appendage (-s) surrounded by a partial, narrow slimy sheath. (14.7-)16.3(-18.2) x (6.5-)7.0(-8.0); Q = 2.1-2.5
I feel this fungus could be near to Rosellinia akulovii L.E. Petrini but I'd like to know your opinion.
Many thanks in advance for your help

it's good to hear from you and Pedro!
The overall morphology and the ascospores with cellular appendages and germ slit on the convex side clearly set this Rosellinia in the aquila-corticium group. Based on ascospores and apical apparatus dimensions and sheath morphology I would call it R. aquila, even though the ascospores are a bit small. I have seen a wide range of variations in this species, from small-spored collections like yours to large-spored ones grading into R. corticium. They might represent different species but they are difficult to separate based on morphology only.
I do not know R. akulovii for comparison.
Sorry Enrique, I guess you are not going to like my answer!
Cheers,
Jacques
Hi Jacques
No. I like very much your expert opinion on this very difficult genus, at least for me.
Many thanks, Jacques!