26-05-2016 04:26
Ethan CrensonHudson Valley, New York, Dutchess County. Substr
26-05-2016 10:26
Blasco Rafael
Hola, tengo esta Coniochaeta que lo mas cercano qu
25-05-2016 17:29
Alain GARDIENNET
Bonjour, Quelqu'un aurait-il cette page en numér
25-05-2016 18:31
Enrique Rubio
HI to all Could someone help me with tis article
24-05-2016 11:34
Blasco Rafael
Hola he recogido estas muestras en cono de Abies a
22-05-2016 21:41
Per VetlesenHiIt was found on bark of Tilia cordata in Stange,
23-05-2016 12:49
Blasco Rafael
Hola, tengo otra Lachnellula esta vez sobre Pinus
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!