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14-11-2018 19:07

Andgelo Mombert

Bonsoir,Sur bois mort de feuillu. Apothécies sess

12-12-2018 20:58

Per Marstad Per Marstad

I found this on Fagus. Spores 60-75 x 5 my, with 8

06-12-2018 07:35

Ethan Crenson

Hello all, These were found by my friend recently

08-12-2018 15:13

Per Marstad Per Marstad

This was growing on Fagus, 2-3 mm. The spores are

09-12-2018 23:06

Joop van der Lee

Found on cow dung. Fruitbody is covered with tufs

06-12-2018 00:02

Elsa Sousa

Good evening,I need your sharp eyes on this ascos.

11-12-2018 17:31

Peter Püwert Peter Püwert

Can somebody help ? Massee G. et Salmon E. S. (19

11-12-2018 23:18

Iglesias Plácido

Hola amigos, est sortie la revue Errotari de cette

10-12-2018 23:47

BERNARD CLESSE BERNARD CLESSE

Que pensez-vous de cette récolte, faite sur crott

07-12-2018 17:24

Enrique Rubio Enrique Rubio

Quelqu'un pourrait-il avoir une copie de ce docume

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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