25-08-2011 17:56
Nicolas VAN VOOREN
Encore un Helotiale problématique ;) Récolté su
14-07-2011 20:53
Alex Akulov
Some photos of specimen are presented below Alex
23-08-2011 22:10
Alex Akulov
Dear FriendsToday I found very nice species - Bion
23-08-2011 10:20
Peter Welt
I am looking for a magazine article where the foll
21-08-2011 11:33
Joseph PellicaniPezize récoltée sur terre nue sous FagusRéac J+
15-08-2011 22:30
Martin Bemmann
Hi all,Peziza is not my territory but I couldn't r
21-08-2011 16:05
Stip Helleman
Chèrs Amis,I would appreciate your opinion on thi
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!