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19-06-2024 17:52

Bernard Declercq Bernard Declercq

Dear all, I am looking for the description and ac

12-06-2024 22:08

Stip Helleman Stip Helleman

Dear all, a week ago this cushen formed species w

18-06-2024 14:07

Thierry Blondelle Thierry Blondelle

Bonjour,Récolte sur une brindille dans une tourbi

17-06-2024 12:00

Juuso Äikäs

A couple days ago I found some Mitrula fruitbodies

16-06-2024 16:47

Hardware Tony Hardware Tony

These apothecia directly growing on a resupinate,

16-06-2024 14:36

Josep Torres Josep Torres

Hello.An anamorph located in nature, on the surfac

15-06-2024 13:51

Thomas Flammer

Just downloaded the english Key for Tarzetta. I h

12-06-2024 07:41

Juuso Äikäs

Yesterday I found some white Mollisias growing on

08-06-2024 14:44

Louis DENY

Sur sphagnum sp dans la tourbière des Pîles à S

09-06-2024 19:34

Spooren Marco Spooren Marco

Hello, Does someone has a PDF of Von Arx"article

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

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
  • message #7267
Gernot Friebes, 29-03-2009 15:24
Re:unknown pyrenomycet 2
  • 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!
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,

  • 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