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Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

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Hi All, I found this Octospora growing with liver

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Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Josep Torres Josep Torres

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28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

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¿Hyaloscypha?
Josep Torres, 17-06-2025 14:23
Josep TorresHello.
A probable Hyaloscypha from last June 1st, sprouting on the debarked wood of a sloping trunk on the deciduous forest floor, where the most abundant species in the area were hazel (Corylus) and oak (Quercus).
Whitish apothecia measuring between 0.20 and 0.50 mm in diameter.
Marginal hairs with pointed tips, short septa at their bases, and measuring (55.9) 60.3 - 92.8 (102.3) × (3.3) 3.4 - 5.3 (5.6) µm.
Exciple hyphae arranged more or less parallel, measuring (9.3) 12.5 - 16.7 (18.4) × (4.5) 4.8 - 6.5 (8.9) µm.
Octosporic asci, with a timid reaction of their tiny apical apparatus to the Melzer, and measuring (39.6) 40.3 - 44.8 (46.2) × (5) 5.2 - 5.7 µm.
Free ascospores cylindrical, with a somewhat pointed end and measuring in water:
(6.4) 6.6 - 8.4 (8.8) × (1.5) 1.6 - 2.2 (2.3) µm
Q = (3.2) 3.3 - 4.6 (5) ; N = 24
Me = 7.4 × 1.9 µm; Qe = 3.9
And the mature spores inside the ascus have very similar measurements: (7.2) 7.23 - 8.4 × (1.7) 1.71 - 2.06 (2.1) µm.
Based on their characteristics, my first choice would be Hyaloscypha, and taking into account the substrate, perhaps even Hyaloscypha daedaleae or Hyaloscypha quercina, but it turns out that in both cases they have a spore width greater than my suggestion. I have also been unable to find any other option within the genus with such narrow spores.
Any feedback from you would be welcome.
Thank you very much in advance.
Best regards.
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Hans-Otto Baral, 17-06-2025 17:52
Hans-Otto Baral
Re : ¿Hyaloscypha?
You have no photos fresh in water? I see croziers and would compare H. fuckelii var. fuckelii.
Josep Torres, 18-06-2025 07:49
Josep Torres
Re : ¿Hyaloscypha?
Thanks, Zotto.
Hyaloscypha fuckelii var. fuckelii seems like a good option.
I'm adding a new image of the asci in water, and it does appear to have croziers.
Best regards.
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Hans-Otto Baral, 18-06-2025 08:53
Hans-Otto Baral
Re : ¿Hyaloscypha?
Water alone is not sufficient. I cannot see any living cells on this photo :-(
Josep Torres, 19-06-2025 07:59
Josep Torres
Re : ¿Hyaloscypha?
Hello Zotto.
Unfortunately, there were few live apothecia in the material I collected, and the only images I was able to obtain of an apothecium that appeared to be in better condition were taken with the Melzer.
Now the material has been through the dryer and is exsiccated. I always do this when I have microscopy available, just to avoid bacterial contamination, which could cause problems if I have to resort to molecular analysis.
Still, thank you for bringing me closer to a specific species, although it might be wisest to leave the subject as "cf."
Best regards.