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21-04-2026 13:36

Wentiomyces-like on Salix
Gernot Friebes

Hi,I am out of ideas for this one. I collected Sal

21-04-2026 13:19

Lophodermium on Typha
Gernot Friebes

Hi,this Lophodermium on Typha has ascospores measu

21-04-2026 13:05

Hyphomycete on Typha
Gernot Friebes

Hi,this hyphomycete feels familiar but I was not a

20-04-2026 22:00

Trichobolus dextrinoideosetosus?
Malcolm Greaves Malcolm Greaves

These pale yellow, hairy ascos were growing on cul

19-04-2026 21:23

Hairy anamorph on plywood with beaked curved conidia
Steve Clements

Bonjour, I found this anamorphic fungus on old pl

19-04-2026 20:46

Anamorphic fungus on plywood
Steve Clements

1 mm diameter approx spherical conidiophores on pl

12-04-2026 17:56

Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Hardware Tony Hardware Tony

Found on dead stems in February earlier this year

17-04-2026 19:16

Small dark synnemata on rotten hardwood
Enrique Rubio Enrique Rubio

Hi to everybodyI would appreciate any assistance r

14-04-2026 05:32

Pyrenomycete with yellow subiculum on Aralia
Ethan Crenson

Hi all, A few weeks back a friend pointed out som

17-04-2026 15:14

sur feuilles de Luzula
Bruno Coué Bruno Coué

Bonjour.Récoltes du 16/04/2026, sur feuilles mort

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Bonjour,
Piet BORMANS, 24-01-2012 19:47
Piet BORMANSIl y a quelques jours j'ai trouvé Pleomassaria siparia sur une petite branche de Betula pendula. 
Sur  la même branche j' ai également trouvé des conidies inconnus. Je les trouvais tellement particulier que  je voudrais en savoir plus. Quelqu'un peut-il m'aider?


Photo 1 (x 400) - 1 graduation vaut 2,51 µm
Photo 2 (x1000) - 1 graduation vaut 1,01 µm


Merci,
Piet Bormans
  • message #17187
  • message #17187
Gernot Friebes, 24-01-2012 20:13
Re : Bonjour,
Hi Piet,

it looks very much like Prosthemium betulinum, the anamorphic state of Pleomassaria siparia. You find a description and illustrations in:

Kazuaki Tanaka, Vadim A. Mel'nik, Maasa Kamiyama, Kazuyuki Hirayama, and Takashi Shirouzu, 2010. - Molecular phylogeny of two coelomycetous fungal genera with stellate conidia, Prosthemium and Asterosporium, on Fagales trees. Botany 88: 1057–1071.

Best wishes,

Gernot
Piet BORMANS, 25-01-2012 10:33
Piet BORMANS
Re : Bonjour,
Thank you very much Gernot.
Piet