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26-05-2018 21:42

BERNARD CLESSE BERNARD CLESSE

Bonsoir à toutes et tous,Hier, j'ai trouvé à la

27-05-2018 08:49

Pintos Angel Pintos Angel

Hello, anybody has  Nag Raj TR, DiCosmo F. 1981.

25-05-2018 17:19

Valencia Lopez Francisco Javier

Hola todos/asAdjunto fotos de unos ascos recolecta

25-05-2018 21:39

BERNARD CLESSE BERNARD CLESSE

Sur tige pourrie d'angélique sauvage, dans une ca

23-05-2018 22:26

Ueli Graf Ueli Graf

Bulletin : Lejeunia 2001 No.166 pp.13 pp. ref.20

20-05-2018 12:13

Rubén Martínez Gil Rubén Martínez Gil

Hola a todos. Subo unas fotos de una Ciboria que

23-05-2018 19:46

BERNARD CLESSE BERNARD CLESSE

Trouvé récemment ce que je pense être un Urceol

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Castillo Joseba Castillo Joseba

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Enrique Rubio Enrique Rubio

Hi againMinute semi-inmersed pseudothecia (up to 2

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De ayer en bosque de hayas y avellanos,   la mad

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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
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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