19-10-2015 20:04
Enrique Rubio
Please read the attached file Many thanks for hel
19-10-2015 09:47
Cvenkel MiranOn Picea abies stump, 1300m amsl. photo
18-10-2015 18:21
Rubén Martínez-Gil
Hola a todos. Subo unas fotos de un asco que enco
16-10-2015 20:18
Javier Ormad
Hola a todos.Sobre hoja seca de Nerium oleander, c
13-10-2015 21:32
Tapia Fidel
Someone can get me this literature?: Korf, R.P. &
13-10-2015 17:50
Blasco Rafael
Hola, tengo esta muestra recogida el fin de semana
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!