28-02-2017 09:34
Roberta PiniGood morning,I am looking for the paper by Lundqvi
05-02-2025 04:38
Ethan CrensonHi all, Found by a friend last Saturday in Staten
01-02-2025 10:01
Vasileios Kaounas
found in the soil, in olive trees and Pistacia ver
01-02-2025 20:32
Andreas Gminder
Hello,today my girlfriend Sylvie found a single ap
30-01-2025 14:54
Karl Soler KinnerbäckHi! Found this one on or next to some Juncus speci
30-01-2025 10:32
victor servranckxHello, I am a biology student from Belgium and on
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!