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28-04-2024 18:05

Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,J'ai trouvé ce matin ce

28-04-2024 13:30

Juuso Äikäs

On Friday I found these pale, hairy little discos

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-04-2024 10:07

Mathias Hass Mathias Hass

Hello, Does anyone know what this is? Found on J

24-04-2024 21:54

éric ROMERO éric ROMERO

Bonjour, J'ai trouvé ce Lasiobolus sur laissées

23-04-2024 15:18

Lothar Krieglsteiner Lothar Krieglsteiner

... but likely a basidiomycete. I hope it is o.k.

23-04-2024 13:17

Edouard Evangelisti Edouard Evangelisti

Bonjour à tous, Je viens de récolter ce que je

23-04-2024 21:49

Ethan Crenson

Hello all, A friend recently found this orange as

22-04-2024 11:52

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I made a loan of a collection of Microstoma

11-01-2022 16:36

Jason Karakehian Jason Karakehian

Hi does anyone have a digital copy of Raitviir A (

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unknown pyrenomycet 2
Gernot Friebes, 29-03-2009 15:18
Hello,

here is my second pyrenomycet I found yesterday. It grew on a thin twig of a deciduous tree. Spores: 21-23 x 5,5-6,5 µm.

Best wishes,

Gernot Friebes
  • message #7266
Gernot Friebes, 29-03-2009 15:19
Re:unknown pyrenomycet 2
perithecia
  • message #7267
Gernot Friebes, 29-03-2009 15:24
Re:unknown pyrenomycet 2
spores
  • message #7268
Jacques Fournier, 29-03-2009 15:35
Jacques Fournier
Re:unknown pyrenomycet 2
Hi again,
the large allantoid spores could fit Eutypella dissepta (Diatrypaceae) but you need further data to support it.
Please make a vertical section to see how perithecia are arranged, and two slides: one in water or Congo red to see if asci are spindle-shaped and long stipitate, another in Melzer's reagent after pretreatment in 3% KOH to check the presence and reaction of apical ring.
More soon!
Jacques
Gernot Friebes, 29-03-2009 18:09
Re:unknown pyrenomycet 2
Hello Jacques,

thank you for your good tip. The asci are indeed long stipitate and don't have any reactions in Melzer's reagent.

At first a picture of the perithecia.

Best wishes,

Gernot
  • message #7277
Gernot Friebes, 29-03-2009 18:09
Re:unknown pyrenomycet 2
spores and asci
  • message #7278
Jacques Fournier, 29-03-2009 18:22
Jacques Fournier
Re:unknown pyrenomycet 2
in Eutypella dissepta the apical ring often does not react clearly with iodine. The configuration of the perithecia within the stroma fits E. dissepta. Moreover, the structure of the wood in cross section is much like that of Ulmus, the usual host of this fungus.
I think you can keep this name
Jacques