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23-11-2017 13:36

Valencia Lopez Francisco Javier

Hola a todosHace unos días recolecte estas escler

24-11-2017 23:44

Bernadette Lefèvre Bernadette Lefèvre

Je retrouve ces photos d 'un champi resté sans no

17-03-2016 09:59

Pascal RIBOLLET

Bonjour Forum, Voici une récolte qui semble appa

23-11-2017 15:27

Zoltan Lukacs Zoltan Lukacs

Hello Everybody,among the scales of pine cone. Do

23-11-2017 17:12

Malcolm  Greaves Malcolm Greaves

I took a sample of wood from a rotten stump with S

24-11-2017 19:56

Chris Yeates Chris Yeates

Bonsoir tousThis was found on corticated attached

24-11-2017 16:11

Gilbert MOYNE

Bonjour,Voici une petite espèce qui me pose encor

22-11-2017 22:38

Garcia Susana

He encontrado un grupo de peritecios creciendo inm

23-11-2017 18:26

Andgelo Mombert

Bonsoir à tous,Sur branchette de feuillus, en fé

09-11-2017 19:35

Stephen Mifsud Stephen Mifsud

I found this greyish mould with a silvery tinge co

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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

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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