12-02-2015 23:42
Miguel Ángel Ribes
Another Hymenoscyphus, now on pinecone of Pinus sy
06-02-2015 12:29
Blasco Rafael
Hola, tengo esta muestra recogida en rama caida de
11-02-2015 00:47
Miguel Ángel Ribes
Good nightI have two different collection of Hymen
12-02-2015 17:14
Blasco Rafael
Hola, tengo lo que creo es un Hysterobrevium, lo m
08-02-2015 16:42
Lepista ZacariasI would like to have your help to identify this Sc
10-02-2015 00:23
Jenny Seawright
Hello all, This seems to be Propolomyces versicolo
11-02-2015 08:39
Francisco SÁNCHEZ
Bonjour. Je ai un rassemblement de 02.02.2015 de
Hi to allThis fungus forms subcuticular pseudothecia (¿?) under the periderm of stems of Arundo donax. These pulvinate and ostiolate ascomata, arranged in longitudinal lines, are singly or situated on small stromata with some other ones, 0.4-1.5 mm long, up to 0.15 mm high.
The 8-spored asci are cylindrical and I think they are bitunicate altough I can see maybe a small structure near the apex. The golden brown bi-cellular ascospores and the pseudoparaphyses are showed in the pics. I tough could be a Didymella or a close related genus, but I don't know a good genus for this collection.
Have you some ides for it?
Thanks again
not sure but your fungus looks like a Roussoella. If so the spores should be delicately longitudinally ribbed, it's difficult to see if the preparation is not very thin.
The smaller spores with broadly rounded ends would fit R. donacicola (Speg.) Ju, Rogers & Huhndorf which is common on this host. The slightly larger and more narrowly elliipsoid are less typical of this species and recall a tropical species, R. chiangraina (in Phytotaxa 181(1), 2014).
Saludos,
Jacques
Hi Jacques
Fantastic! I feel you are right, although the faint striate ornamentation is hardly visible. But the rest of the generic characters fits well with this fungus.
Thanks a lot!