01-06-2015 20:33
Enrique RubioHi to everybody and specially to J. Fournier, a ve
31-05-2015 18:02
Bernard CLESSEBonjour à tous,J'ai photographié il y a un mois
31-05-2015 19:08
Bernard CLESSEJe pense bien le reconnaître maintenant et j'essa
01-06-2015 16:02
Chris YeatesBonjour touswhile preparing some images of Lachnum
01-06-2015 14:47
Enrique RubioHI again I'm looking for specific literature on R
31-05-2015 21:59
Lothar KrieglsteinerDuring the project of fungi on dead stems in the B
31-05-2015 23:48
Ismael WindI'm thinking of this species. It was found on frax
31-05-2015 21:10
Bernard CLESSEPouvez-vous me confirmer Mollisia retincola à la
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!