10-05-2024 17:40
Anna KlosGood afternoon, Thursday during an inventory we f
14-05-2024 09:19
Hans-Otto BaralHi, I want to announce for next Sunday 17.00 middl
14-05-2024 21:43
Thierry BlondelleBonjour,A côté de Hystérographium fraxini, ces
14-05-2024 19:48
B Shelbourne• Hymenoscyphus: Habitat, macro, spores, paraphy
13-05-2024 12:48
Eduard OsieckAfter eight years (*) I found the same apiosporous
11-05-2024 18:08
B Shelbourne• Mollisia on tree leaves: On dead Quercus leave
12-05-2024 11:48
Michel HairaudBonjour , Voici une récolte d'une Rhytismataceae
11-05-2024 00:33
Ethan CrensonI'm not entirely sure that Encoelia-like is the ri
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