27-03-2014 15:38
Gerrit Jansen
Hi all, Could anyone give me an idea what this cou
26-03-2014 19:46
Rubén MartÃnez-Gil
Hola a todos.Pongo unas imágenes de Hypocrea enco
24-03-2014 17:54
Alessio Pierotti
Someone have this book ?Rehm H. 1882. - Ascomycete
20-03-2014 22:55
Salvador TelloHola.he encontrado estos hongos creciendo en gramÃ
21-03-2014 21:49
Ralph Vandiest
Hello,I found this cheilymenia species on dung. Or
19-03-2014 20:05
Peter ThompsonHello Everyone,I have received some data and image
21-03-2014 13:26
Peter ThompsonHello Everyone,I have been given some data and ima
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!