17-04-2026 19:16
Enrique Rubio
Hi to everybodyI would appreciate any assistance r
14-04-2026 05:32
Ethan CrensonHi all, A few weeks back a friend pointed out som
17-04-2026 15:14
Bruno Coué
Bonjour.Récoltes du 16/04/2026, sur feuilles mort
12-04-2026 15:52
Gernot FriebesHi,I'm looking for help with this anamorph collect
14-04-2026 21:52
Gernot FriebesHi,found on dead leaves of Carex elata. Conidia: 4
16-04-2026 22:09
Buckwheat PeteHello, I'd like to ask about this older specimen:
15-04-2026 19:33
Fátima Durán ManzanequeHi!! I need help, I found this Ascomycete but I d
14-04-2026 20:31
Gernot FriebesHi,can this be Psilachnum lateritioalbum on Phragm
12-04-2026 17:56
Hardware Tony
Found on dead stems in February earlier this year
12-04-2026 12:22
William Slosse
In a dune grassland in Oostduinkerke (Belgium), on
Xylaria oxyacanthae on Juglans regia?
Gernot Friebes,
03-09-2020 18:26
in the monograph on European species of Xylaria by Jacques (http://www.ascofrance.com/uploads/xylaria/201406.pdf) it is mentioned under X. oxyacanthae that anamorphic stromata of Xylaria are known from nuts of J. regia but they have not been identified to species yet. Here we have a collection made by a friend with stromata on old nutshells of J. regia and we are wondering if this could in fact be X. oxyacanthae.
The ascospores measure about 8.5–11.5 x 4.7–5.4 µm. They have a germ slit that is often clearly shorter than spore length.
Thanks for your input!
Best wishes,
Gernot
Jacques Fournier,
04-09-2020 09:02
Re : Xylaria oxyacanthae on Juglans regia?
Hi Gernot,
nice find, much like X. oxyacanthae but acospore morphology is indeed a bit deviating.
My comments on this species have been outdated by JU et al. (2018) Mycologia 110(4): 726-749 who provisionally recognize X. oxyacanthae as able to colonize woody fruits and seeds of various unrelated plants but do not rule out the possibility of intraspecific variations related to the host-specificity.
You should ask Yu-Ming Ju if he is interested in sequencing your material which seems in good condition. I guess he will.
Cheers,
Jacques
Gernot Friebes,
06-09-2020 09:15
Re : Xylaria oxyacanthae on Juglans regia?
Thank you very much, Jacques.
In the meantime my friend collected presumably the same Xylaria on a peach stone at ± the exact same location, so it would support the hypothesis that this species is not particularly host specific.
It seems to me that the germ slit is a little bit short for X. oxyacanthae but I have little experience with that species...
I will contact Yu-Ming Ju and keep you informed in case we make any progress.
Best wishes,
Gernot
In the meantime my friend collected presumably the same Xylaria on a peach stone at ± the exact same location, so it would support the hypothesis that this species is not particularly host specific.
It seems to me that the germ slit is a little bit short for X. oxyacanthae but I have little experience with that species...
I will contact Yu-Ming Ju and keep you informed in case we make any progress.
Best wishes,
Gernot