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21-09-2018 23:44

Edouard Evangelisti Edouard Evangelisti

Bonjour le forum, Pourriez-vous m'aider à confir

13-09-2018 19:17

Marc Detollenaere Marc Detollenaere

Dear forum, Yesterday I found setous fruit bodies

21-09-2018 15:10

Johan Myhrer

Central sweden in a marsh by a shallow lake I foun

21-09-2018 11:57

Vasileios Kaounas Vasileios Kaounas

At the moment I do not have enough data.Just a fri

18-09-2018 21:28

Jacky Launoy

On moose dung (Alces alces) collected in Sweden (P

19-09-2018 15:30

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour.Je cherche une version digitale de ce docu

19-09-2018 23:11

Marc Detollenaere Marc Detollenaere

Good evening everybody, This afternoon we found s

14-09-2018 21:14

Marc Detollenaere Marc Detollenaere

Hello forum, On rabbit dung I discovered a number

18-09-2018 15:33

Chris Yeates Chris Yeates

Bonjour tous Normally I steer clear of this daunt

18-09-2018 14:10

Savic Dragisa

Is this Pachyella punctispora? I found it on a dam

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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