07-02-2023 22:28
Ethan CrensonHello friends, On Sunday, in the southern part of
19-02-2026 17:49
Salvador Emilio JoseHola buenas tardes!! Necesito ayuda para la ident
19-02-2026 13:50
Margot en Geert VullingsWe found this collection on deciduous wood on 7-2-
16-02-2026 21:25
Andreas Millinger
Good evening,failed to find an idea for this fungu
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Lothar Krieglsteiner
20.6.25, on branch of Abies infected and thickened
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Nicolas Suberbielle
Bonjour à tous, Je recherche cette publication :
Strange fungus on rotten Quercus wood in stream
Paul Cannon,
19-08-2025 16:27
Hello all
I have spent some time trying to work out what this is, without success. The ascomata are either strongly cupulate discs or (probably) hemiangiocarpic ascomata with broad ostioles, superficial on rotten wood accompanying a pink Orbilia. They are around 150 µm diam. and thin-walled with small globose cells that are heavily melanized, making their structure obscure. The hamathecium is of cellular pseudoparaphyses (I think) that tend to break down at maturity, with the apices forming a brownish epithecium. The asci are clavate to saccate and almost sessile, without any clear apical structures, and the ascospores are 22-24 x 7-8 µm, colourless and 1-septate, without any clear sheath.
Any suggestions would be gratefully received.
Paul
Jacques Fournier,
19-08-2025 16:48
Re : Strange fungus on rotten Quercus wood in stream
Hello Paul,
going aquatic? You are right, it's full of treasures.
I guess you found a Minutisphaera and I agree it's puzzling the first time. You can find information on the genus in
Freshwater Ascomycetes: Minutisphaera (Dothideomycetes)
revisited, including one new species from Japan
Mycologia, 105(4), 2013, pp. 959–976. DOI: 10.3852/12-313.
Your spores seem too small for M. japonica which is fairly common in France. Maybe M. fimbriata that I found once, but since this time new species could have been added.
Good luck!
Jacques
going aquatic? You are right, it's full of treasures.
I guess you found a Minutisphaera and I agree it's puzzling the first time. You can find information on the genus in
Freshwater Ascomycetes: Minutisphaera (Dothideomycetes)
revisited, including one new species from Japan
Mycologia, 105(4), 2013, pp. 959–976. DOI: 10.3852/12-313.
Your spores seem too small for M. japonica which is fairly common in France. Maybe M. fimbriata that I found once, but since this time new species could have been added.
Good luck!
Jacques
Paul Cannon,
19-08-2025 16:55
Re : Strange fungus on rotten Quercus wood in stream
Thank you. You're a star!
Paul





