22-05-2024 23:39
Marc DetollenaereDear Forum,On debarked Fagus I found some small wh
21-05-2024 17:48
Karl Soler KinnerbäckHi all,Could this be Venturioscypha or Venturiocis
21-05-2024 11:33
Nihad OmerovicHello,found on dead, dry, attached (and fallen) tw
07-11-2018 08:34
Zuzana Sochorová (Egertová)Hello, could someone send this publication to me
21-05-2024 09:15
Pierre RepellinBonjour à tous,L'ouvrage de Björn Wergen: Handbo
21-05-2024 16:12
Thomas FlammerSubstrate: not quite sure, on pluvious stem of a h
17-05-2024 16:25
Pavel JiracekErioscyphella lunata, found on a fallen needle of
20-05-2024 21:28
Nihad OmerovicHello,Found this Orbilia on a dry, attached twig o
18-05-2024 10:47
Anna KlosGoodmorning,We found this tiny ascomycete (max. 1m
On medium size (40-70 mm in diam.) felled branches of Alnus glutinosa lying on the ground
I have found many inmersed, at first hyaline later greenish, perithecia that no
are into a clearly definited stroma. No ventral black lines. The necks are protruding across a well visible greyish disc.
The asci have an apical refringent apparatus and they are abruptly contracted at their base
(Diaporthales). No paraphyses I have seen. The ascospores are hyaline, later greenish, 1-(0) septate, very polimorphic, with some aberrant forms. No appendages. The spores are surrounded by a gelatinous sheath.
Dispersed between the perithecia they are many inmersed greenish conidiomata that could
be the anamorphic state of this fungus.
What do you think?
Thanks again
I have tried to find out your finding for several hours yeasterday, but without success. I think it belongs to Melanconidaceae and probably near Massariovalsa, a genus with quite darker spores. According to Barr 1978 (Diaporthales and its segregates), your fungus matches the genera Massariovalsa, Hercospora and Hapalocystis, this because of the small layer of a gray stromatic tissue right under the surface, embedding the perithecia into wood and not into a stroma. I have also checked several original descriptions of species of aforementioned genera but without any matching conclusion. Probably a new species, perhaps Walter will say something about it :)
btw: you can put this one into the dropbox, too. Many thanks.
regards,
björn