13-08-2020 19:44
Lothar Krieglsteiner
... last week in the Eifel (Germany). It looks mac
13-08-2020 21:47
Andgelo Mombert
Bonsoir, Sur tige morte d'une plante suffrutescen
13-08-2020 21:33
Andgelo Mombert
Bonsoir, Sur tige morte de Dryas octopetala, vers
13-08-2020 19:22
Pavol PaloHello friends, may I ask you for help ? I would n
09-08-2020 07:55
Lothar Krieglsteiner
... maybe Molinia, in an acid bog (near Narthecium
15-02-2018 08:09
BERNARD CLESSE
Sur tige morte de renouée du Japon.Aucune idéeâ€
09-07-2020 00:39
Valencia Lopez Francisco JavierHola a todosEncontré este curioso ascomycete a me
08-08-2020 20:54
Antonio CouceiroAscoma de 5cm, creciendo entre raices de Prunus la
09-08-2020 22:18
Lothar Krieglsteiner
... the spores of this find (today, in the Eifel,
09-08-2020 15:33
Eduard OsieckCan somebody provide a copy of GÖRKE, C. & H
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!