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Mot de passe perdu? S'inscrire

19-05-2020 11:33

Maria Plekkenpol Maria Plekkenpol

Hello, I just read the post from 18-05-2020 and I

19-05-2020 09:59

Joop van der Lee Joop van der Lee

When we are investigating characters of species un

18-05-2020 12:18

Valencia Lopez Francisco Javier

Hola a todos/asEncontré estas Pachyella sp, en un

17-05-2020 21:39

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur branchette de Sambucus nigra, vers 8

17-05-2020 21:27

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur bois mort, dans un ruisseau, en comp

18-05-2020 13:07

Juuso Äikäs

These I found growing on the underside of loosened

18-05-2020 11:20

Castillo Joseba Castillo Joseba

Me mandan esta muestra de Xylaria de Galicia, reco

16-05-2020 21:31

Mirek Gryc

Hello allFound a few days ago on unidentified wood

17-05-2020 21:20

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur bois mort de feuillu trempant dans u

14-05-2020 20:18

Juuso Äikäs

Mollisia is a difficult genus, but I decided to po

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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