
14-08-2022 18:08

Found on deciduous wood (probably Betula) in subal

14-08-2022 15:50

Hello,this Orbilia grew on a strongly rotten branc

13-08-2022 17:18

I assumed these are weak colonies of Neurospora on

10-08-2022 15:45
Pierre-Yves JulienRécolte le 31/07/2022 – Ozoir-la-Ferrière (77)

11-08-2022 00:45
Stefan JakobssonOn a thin deciduous stick (Salix/Alnus/Betula) on

10-08-2022 18:45
François BartholomeeusenGood evening all, On 5 August 2022, a friend gave

11-08-2022 08:16
Hola.Un muy diminuto Pirenomyceto sobre un tronco

09-08-2022 20:06

I have found an interesting aspergillus on flowers
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!