21-01-2026 16:32
Gernot FriebesHi,I need your help with some black dots on a lich
21-01-2026 16:48
Gernot FriebesHi,after my last unknown hyphomycete on this subst
20-01-2026 17:49
Hardware Tony
I offer this collection as a possibility only as e
15-01-2026 15:55
Lothar Krieglsteiner
this one is especially interesting for me because
17-01-2026 19:35
Arnold BüschlenHallo, ich suche zu Cosmospora aurantiicola Lite
16-01-2026 00:45
Ethan CrensonHi all, On decorticated hardwood from a New York
18-01-2026 12:24
Josep Torres
Hello.An anamorph located on the surface of a thin
Hymenoscyphus?
Josep Torres,
23-12-2025 08:27
Hello.Small, yellowish ascomata, with very short and rudimentary stalks, greenish in mature specimens, sprouting from the surface of decaying leaves of Quercus rotundifolia.
Only 0.2 to 0.4 mm in diameter.
Basal hyphae elongated, arranged parallel to each other, and pigmented.
Hyphae of the excipulum globose-angularis in texture.
Octosporous asci, with an amyloid reaction in their apical apparatus, and although difficult to observe in some of these asci, I thought I saw croziers. Fusiform ascospores with pointed ends, two or three large lipid droplets and several smaller ones scattered throughout, measuring in water:
(14.3) 16 - 19.3 (22) × (2.8) 3.1 - 4.3 (4.5) µm
Q = (4.2) 4.3 - 5.5 (5.7) ; N = 40
Me = 17.8 × 3.6 µm ; Qe = 4.9
Based on these characteristics, I think it could be a species of the Hymenoscyphus/Phaeohelotium complex, but I have no other suggestion that convinces me.
Any opinions you may have would be welcome.
Thank you in advance.
Best regards.
Hans-Otto Baral,
23-12-2025 10:57
Re : Hymenoscyphus?
You don't have living paraphyses? That would be helpful. Surely no Hymenoscyphus, the apical ring is more of the Calycina type. The brown excipulum is remarkable. There are no hairs?
Josep Torres,
23-12-2025 14:22
Re : Hymenoscyphus?
Thanks, Zotto.
I couldn't observe any structures in the prepared samples that could correspond to hairs. The closest thing were the terminal hyphae visible above the image of the excipulum, which might correspond to marginal hyphae. There were no live paraphyses either. The apothecia were past their prime, and there were only asci and a collapse of spores. Since I have quite a bit of material from this sample, if we can't reach any conclusions, I'll send it for sequencing in my next shipment, which would be next year.
Best regards.
I couldn't observe any structures in the prepared samples that could correspond to hairs. The closest thing were the terminal hyphae visible above the image of the excipulum, which might correspond to marginal hyphae. There were no live paraphyses either. The apothecia were past their prime, and there were only asci and a collapse of spores. Since I have quite a bit of material from this sample, if we can't reach any conclusions, I'll send it for sequencing in my next shipment, which would be next year.
Best regards.
Hans-Otto Baral,
23-12-2025 14:57
Re : Hymenoscyphus?
That would be interesting to obtain DNA. It looks a bit like a Hyphodiscus. But such big spores are unknown there.