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21-08-2025 18:09

Edmond POINTE Edmond POINTE

Bonjour Amis mycologues.Trouvé sur crottin de che

20-08-2025 19:04

Ethan Crenson

Hello, This asco was found on the same wood as my

21-08-2025 02:18

Stefan Jakobsson

On a necrotic section of a living Tilia cordata I

18-08-2025 23:15

Zoe Vélez Zoe Vélez

Hola foro, gracias por aceptar la creación de mi

19-08-2025 20:58

Ethan Crenson

Hi all, Here is what I believe to be a Hymenoscyp

12-08-2025 19:44

Enrique Rubio Enrique Rubio

Could someone send me a pdf copy of this article?S

18-08-2025 15:17

Lothar Krieglsteiner Lothar Krieglsteiner

... on 6.7.25 in a subarctic mire near a small lak

18-08-2025 15:07

Lothar Krieglsteiner Lothar Krieglsteiner

.. 20.7.25, in subarctic habital. The liverwort i

19-08-2025 16:27

Paul Cannon

Hello all I have spent some time trying to work o

18-08-2025 22:59

Yanick BOULANGER

BonsoirVoici un asco récolté le 08/08/2025Comme

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Graddonidiscus?
Stefan Jakobsson, 10-05-2020 23:27
Hello,

For once the path through the main key of Raitviir (2004) was short: two steps to Graddonidiscus and in the genus key one step to G. vandae. Then the problems start.


This fungus was growing on an old leaf of Vaccinium myrtillus(?) attached to a dropping of elk (Alces alces) in a boggy habitat, just a few minute scattered apos. Finland. Spores 4.7 - 5.6 × 1.4 - 1.9 µm; asci approx. 25 x 3-4; paraphyses lanceolate, about 45 x 5; ectal excipulum textura prismatica.


I would appreciate any help with this.


Stefan

  • message #63125
  • message #63125
Charles Aron, 11-05-2020 09:41
Charles Aron
Re : Graddonidiscus?

Hi Stefan,


To me this looks like Lachnum rhytismatis with its crystal-capped hairs combined with the substrate. I remember finding quite frquent ascomata on fallen leaves of Vaccinium myrtillus.


Best wishes,


Charles.

Hans-Otto Baral, 11-05-2020 09:54
Hans-Otto Baral
Re : Graddonidiscus?
Yes, I agree. But there exist different species. On Vaccinium Velenovsky described Lachnum microsporum, so this would be the option here. But there is not  molecular study with enough sequences to clarify how many species might exist and how host-specific they are. In any case, the only good morphological character to separate these microspecies seems th be the ascus base (with or without croziers). Available data suggest, however, that on Vaccinium both cases occur....

Zotto
Stefan Jakobsson, 11-05-2020 10:07
Re : Graddonidiscus?
Yes, of course you are right. Too late to think clearly.

Thanks,

Stefan