Accès membres

Mot de passe perdu? S'inscrire

20-07-2018 07:04

Blasco Rafael Blasco Rafael

Hola puede ser la Orbilia que priopongo ??sonre ma

19-07-2018 13:29

Savic Dragisa

I think this is Peziza tenacella, the ornamentatio

19-07-2018 20:31

Blasco Rafael Blasco Rafael

Hola, He visto en casa estas muestras al mirar Orb

19-07-2018 10:09

BERNARD CLESSE BERNARD CLESSE

Bonjour à toutes et tous,Trouvé sur berge raide

19-07-2018 00:11

Thorben Hülsewig

Hi there,today i found on ground this ascomycet th

18-07-2018 18:33

Guillaume Eyssartier

Bonjour à tous, je vous envoie cet étrange asco

15-07-2018 17:56

Riet van Oosten Riet van Oosten

Hello, Found 14-07-2018 on Phragmites australis (

18-07-2018 18:02

Elisabeth Stöckli

Bonjour, Trouvé sur feuilles mortes d'Eriophorum

17-07-2018 21:24

BERNARD CLESSE BERNARD CLESSE

Voici un asco blanc récolté dans un fossé tourb

15-07-2018 15:07

BERNARD CLESSE BERNARD CLESSE

Bonjour à toutes et tous,Je pense avoir trouvé S

« < 1 2 3 4 5 > »
Pyrenomycete sp.
Stefan Blaser, 12-11-2017 08:46
Hello everybody,

One more collection where I could need some help:

Substrate: Strongly decayed coniferous wood

Description:
Perithecia superficial on wood, nearly globose, diameter 0.4-0.5 mm, with a short ostiolar neck of 40-50 µm on top. Perithecial wall dark brown tob lack, slightly rough.


Perithecial surface consisting of brown, globose, rough-walled cells of 15-20 µm in diameter.
Perithecial content reddish. Asci 8 spored, IKI negative, CR positive, 200-250 x 12-13 µm. Spores hyaline to very slightly coloured, 8-11 septate but probably mostly 10 septate (not always easy to count), 75-82 x 4-4.5 µm.


Many thanks,


Stefan

  • message #51189
  • message #51189
  • message #51189
  • message #51189
  • message #51189
  • message #51189
Jacques Fournier, 12-11-2017 09:49
Jacques Fournier
Re : Pyrenomycete sp.
Hi Stefan
several features of your fungus recall Ceratosphaeria but it is clearly different from C. lampadophora.
I suggest you read Huhndoerf et al, Mycologia, 100(6), 2008, pp. 940–955. DOI: 10.3852/08-037
Best,
Jacques
Gernot Friebes, 12-11-2017 09:59
Re : Pyrenomycete sp.
Hi, Stefan,

the outer wall being composed of ± globose cells in combination with the filiform ascospores reminds me of certain Chaetosphaeria species with these characteristic features – there's a paper dedicated to them: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.522.5595&rep=rep1&type=pdf

Most (all?) of these species should have some black setae on the ascomatal wall though, maybe you overlooked them?

See also these nice images of C. ellisii that give you an overwiew of the general features of this group: http://www.discoverlife.org/mp/20q?search=Chaetosphaeria+ellisii&flags=glean:

Let's see if someone else has a better/more specific idea!

Best wishes,
Gernot

PS: Jacques beat me to it – good to see that we had similar thoughts. :-)
Edit: Oops, Jacques mentioned Ceratosphaeria, not Chaetosphaeria. Should have read it more carefully!
Stefan Blaser, 12-11-2017 17:44
Re : Pyrenomycete sp.
Dear Jacques and Gernot,

thank you very much for the suggestions, I will have a look in these directions.

Stefan
Stefan Blaser, 16-11-2017 10:37
Re : Pyrenomycete sp.
Hi everybody,

I reexamined my material mostly to search for setae.
However I was not able to observe any.

Nevertheless, I think my specimen fits well in scolecosporous Chaetosphaeria and is for example similar to Chaetosphaeria lapazina which may also lack setae. That will be my working name until better knowledge...

Stefan