11-02-2026 22:15
William Slosse
Today, February 11, 2026, we found the following R
11-02-2026 19:28
Lothar Krieglsteiner
on small deciduous twig on the ground in forest wi
25-04-2025 17:24
Stefan BlaserHi everybody, This collection was collected by JÃ
10-02-2026 17:42
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous me donner
10-02-2026 18:54
Erik Van DijkDoes anyone has an idea what fungus species this m
09-02-2026 20:10
Lothar Krieglsteiner
The first 6 tables show surely one species with 2
09-02-2026 14:46
Anna KlosGoedemiddag, Op donderdag 5 februari vonden we ti
02-02-2026 21:46
Margot en Geert VullingsOn a barkless poplar branch, we found hairy discs
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.