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Mot de passe perdu? S'inscrire

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 (

22-04-2024 08:54

Rafael Cabral

Bonjour à toutes et tous, Quelqu'un pourrait-il

22-04-2024 20:38

Miguel Ãngel Ribes Miguel Ángel Ribes

Good afternoon.Does anyone know this anamorph?It g

21-04-2024 14:29

B Shelbourne B Shelbourne

• Genus Brunnipila: Distinct macro and habitat,

19-04-2024 14:28

B Shelbourne B Shelbourne

Cudoniella tenuispora: Distinctive macro and habit

20-04-2024 16:02

Michel Hairaud Michel Hairaud

Bonjour,On me fait part, pour diffusion d une list

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Polydesmia sp. ?
Simon Gurtner, 31-01-2024 22:28
Simon GurtnerGood evening,

Here is a species I found on the stroma of an undetermined Pyrenomycete, on the inside of scales of a pine cone.


Apothecia 0.1 - 0.35 mm, gregarious, initially turbinate and whitish, then developed into a small disc and yellowish in colour. Short stalked, with few, relatively large anchor hyphae.


Ectal excipulum textura prismatica, horizontally orientated.


Asci 8 sp., clavate with hooks, inoperculate, biseriate and IKI+. n7 = (62) 69.31 (86.5) x (9.5) 10.14 (10.8)


Spores hyaline. Fusoid, inequilateral to allantoid. Mature spores with three septa and 4 oil drops. N 36= (16) 21.99 (28) x (3) 3.52 (4.1).
Many spores are peculiarly deformed (frost damage?)


Paraphyses hyaline, slender, cylindrical, partly forked and slightly twisted in the upper part. 1.5 - 2.5 my wide, with 2-3 septa.


I think of Polydesmia. P. turbinata has similarities, but has been described on stroma on Eucalyptus fruit capsules.
Maybe I am completely wrong.


Many thanks for your support


Simon

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Hans-Otto Baral, 01-02-2024 07:29
Hans-Otto Baral
Re : Polydesmia sp. ?
Good morning

it would be better to use oil immersion, this looks like 400x.

My guess is Pseudhelotium sordidulum (= P. vernale), with typically fusoid spores of that size.

I have it in my Hyaloscyphaceae folder.

At the margin are short septate hairs with sometimes yellow-brown granular exudate.

Polydesmia has apically irregularly branched paraphyses.
Simon Gurtner, 01-02-2024 15:32
Simon Gurtner
Re : Polydesmia sp. ?
Hallo Zotto

Vielen Dank für deine Eräuterung die absolut Sinn macht. 

Grüsse, Simon