03-10-2025 22:03
Francois Guay
Hi everyone, I found this weird asco growing on wo
03-10-2025 22:17
Francois Guay
Hi everyone, I found this white, star-shaped
04-10-2025 02:13
Francois Guay
Hi everyone, I found this Hymenoscyphus growi
03-10-2025 13:44
Riet van Oosten
Hello, Found by Laurens van der Linde on Populus
03-10-2025 10:25
Jean-Luc RangerQue pensez-vous de ce Chaetomium sp : 10- 10,5 x 6
03-10-2025 09:43
Josep Torres
Tiny blackish ascomata shaped like erumpent grains
02-10-2025 09:16
Josep Torres
Hello.Some tiny apothecia sprouting in a scattered
01-10-2025 20:16
Zuzana Sochorová (Egertová)
Hello,I would appreciate your opinion on this yell
01-10-2025 19:47
Philippe PELLICIERUn parasite sur les feuilles de graminées qui for
Unknown on Populus -> Pyxidiophora species
Riet van Oosten,
03-10-2025 13:44
Hello,
Found by Laurens van der Linde on Populus (25-09-2025).
We have no idea what this could be.
Greetings, Riet
David Malloch,
03-10-2025 14:21
Re : Unknown (maybe a basidiomycete?)on Populus
That is really fascinating!
It appears to be a mass of colourless perithecia. The spores resemble ascospores of a Pyxidiophora species. Is it growing over a decaying mushroom?
Martin Bemmann,
03-10-2025 16:37
Re : Unknown (maybe a basidiomycete?)on Populus
Hi David,
I would agree with a Laboulbeniaceae, but with a spectacular appearence!
But what would be the host?!
Regards
Martin
David Malloch,
03-10-2025 16:59
Re : Unknown (maybe a basidiomycete?)on Populus
The third picture shows something resembling an erumpent stroma with the parasite seated on top. Pyxidiophora is probably a very large genus with hosts in both Ascomycota and Basidiomycota. I have seen several (unnamed) species on decomposing brown algae. These can be grown in culture if they are provided with an appropriate host such as Paradendryphiella arenaria.
Riet van Oosten,
03-10-2025 19:00
Re : Unknown (maybe a basidiomycete?)on Populus
Thank you very much for your reactions David en Martin!
Got a photo from Laurens, could this be the host?
Also some additional pictures from the last days.
David Malloch,
03-10-2025 19:30
Re : Unknown on Populus -> Pyxidiophora species
Hello Riet,
It looks to me like it is fruiting on the surface of another ascomycete, perhaps a valsoid pyrenomycete. I suspect it is an undescribed species of Pyxidiophora, but it would be very nice if you could confirm that with a DNA sequence. I am retired and no longer have the facilities to do that, but perhaps someone in the AscoFrance community can help. It is a wonderful fungus that begs for further study.
David
Riet van Oosten,
03-10-2025 19:41
Re : Unknown on Populus -> Pyxidiophora species
Hello David,
So nice that we now know more about this beautiful fungus, thanks again for your help!
Riet