07-01-2026 10:24
Danny Newman
Pezicula sp. on indet. hardwood Appalachian Highl
07-01-2026 22:22
Danny Newman
Tatraea sp. on indet. hardwood The Swag, Great Sm
07-01-2026 17:29
Marc Detollenaere
Dear Forum,On a barkless Populus I found some smal
10-11-2021 17:33
Riet van Oosten
Add-on topic http://www.ascofrance.com/forum/7059
07-01-2026 10:05
Danny Newman
cf. Chaetospermum on XylariaCosby Campground, Grea
02-01-2026 17:43
MARICEL PATINOHi there, although I couldn't see the fruitbody, I
04-01-2026 17:45
Stephen Martin Mifsud
I was happy to find these orange asmocyetes which
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