31-01-2026 10:22
Michel Hairaud
Bonjour, Cette hypocreale parasite en nombre les
29-08-2025 05:16
Francois Guay
I think I may have found the teleomorph of Dendros
31-01-2026 09:17
Marc Detollenaere
Dear Forum,On decorticated wood of Castanea,I foun
30-01-2026 21:20
Arnold BüschlenBryocentria brongniartii und B. metzgeriae mit ihr
21-01-2026 16:32
Gernot FriebesHi,I need your help with some black dots on a lich
07-12-2015 14:17
Zugna Marino
Buon giorno a tutti, ad un primo momento, non ess
29-01-2026 10:04
Jean-Paul Priou
Bonjour à tous, Marcel LECOMTE président de L'A
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
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
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!
thank you very much for the suggestions, I will have a look in these directions.
Stefan
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