Accès membres

Mot de passe perdu? S'inscrire

08-10-2018 14:51

Edvin Johannesen Edvin Johannesen

I came across these dense mats of apothecia seated

18-10-2018 10:37

Bernard Declercq Bernard Declercq

Hello, Can anyone supply me following paper? Pa

17-10-2018 07:10

Ethan Crenson

In Northeastern North America.  On the banks of a

15-10-2018 18:55

hannie wijers

Hello, I'd like some help if possibleIn Beilen I

16-10-2018 23:33

Valencia Lopez Francisco Javier

Hola a todos/asPeziza recolectada en el sur de Esp

03-10-2018 22:13

François Bartholomeeusen

Good evening forum members,Can this be Hyalorbilia

14-10-2018 19:25

Marja Pennanen

Hi, on a Populus leaf among other things, I found

15-10-2018 10:52

Castillo Joseba Castillo Joseba

Del pasado sabado en bosque de avellanos,   pare

14-10-2018 22:24

Castillo Joseba Castillo Joseba

De ayer sobre tierra en terrenos de cultivo con av

10-10-2018 23:11

Viktorie Halasu Viktorie Halasu

Hello forum,I would like to ask how to call correc

« < 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