04-11-2025 09:07
Josep Torres
Hello.A suspected Hymenoscyphus sprouting on a thi
04-11-2025 12:43
Edvin Johannesen
Hi! One more found on old Populus tremula log in O
03-11-2025 21:34
Edvin Johannesen
These tiny (0.4-0.5 mm diam.), whitish, short-stip
28-10-2025 15:37
Carl FarmerI'd be grateful for any suggestions for this strik
03-11-2025 16:30
Hans-Otto Baral
Hello I want to ask you if you have found this ye
28-10-2025 19:33
Nicolas Suberbielle
Bonjour à tous,Je voudrais votre avis sur cette r
Using the limited literature I have available, I think it's an Anthostomella species.
The perithecia are ca 0.1-0.2 mm across . Asci are cylindrical, 65-80 x 5-6 µm. Tips stain blue in Melzer's. Spores are uniseriate in the ascus, brown, 8-10 x 3-4 µm. I can't see any sign of an appendage on the spores.
If anyone has any suggestions, I would be very grateful.
Merci
Marcus
can you see a (possibly faint) germination slit on the spores? Anthostomella has a tendency to appear on monocot's, though not exclusively. A. limitata is plurivorous, and has spores in this size range, but for the time being I am being cautious . . .
I can send you Sheila Francis' Anthostomella monograph (Mycol. Pap. 139 (1975) ) if you are interested . . .
best wishes
Chris
microscopy fits well Anthostomella but in that genus ascomata are typically imersed under a clypeus. It is not clear to me on your photo whether ascomata are superficial or immersed in the substrate. Otherwise I agree with Chris that A. limitata would be a possible candidate. The signature of this species is a spiralling germ slit to the ascospores, often hard to make out, try a very thin slide in 3% KOH, it may help. Also try to make a vertical section across the fungus to see if it is immersed under a clypeus.
Good luck,
Jacques
Hi Chris
It would be great if you could send me the Anthostomella monograph.
I couldn't see a germ slit on the spores but didn't look very closely.
A. limitata does seem to be a possibility. I considered A. tomicoides and A. clypeoides, which have also been recorded on a range of host species, but the spores aren't right.
Marcus
Thanks for your suggestions. I'll have a closer look.
The perithecia are superficial.
Marcus
I'd be very interested in the Anthostomella monograph as well. Thanks in advance!
Best wishes,
Gernot
I'd be also very interested in the Anthostomella monograph as well. Thanks in advance!
Best wishes,
Francis