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13-09-2025 15:43

Edmond POINTE Edmond POINTE

Bonjour Christian,J'ai trouvé deux spores ressemb

13-09-2025 15:43

Edmond POINTE Edmond POINTE

Bonjour Christian,J'ai trouvé deux spores ressemb

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

13-09-2025 14:10

Wim de Groot

We found this hymenoscyphus on rubus fruticulosis.

13-09-2025 14:01

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

10-09-2025 23:53

Marcel Heyligen Marcel Heyligen

Found on Robinia pseudoacasia together with Diapor

10-09-2025 17:18

Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

02-09-2025 11:34

Thomas Læssøe

https://svampe.databasen.org/observations/10527903

07-09-2025 08:19

Josep Torres Josep Torres

Hello.Tiny pinkish discomycetes, photographed and

09-09-2025 12:07

Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

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Rosellinia on Salix wood
Enrique Rubio, 01-06-2015 20:33
Enrique RubioHi to everybody and specially to J. Fournier, a very good specialist on this genus.

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

  • message #36250
  • message #36250
  • message #36250
  • message #36250
  • message #36250
  • message #36250
Jacques Fournier, 01-06-2015 21:19
Jacques Fournier
Re : Rosellinia on Salix wood
Hola Enrique,
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
Enrique Rubio, 01-06-2015 21:31
Enrique Rubio
Re : Rosellinia on Salix wood

Hi Jacques


No. I like very much your expert opinion on this very difficult genus, at least for me.


Many thanks, Jacques!