05-07-2025 12:38
Åge OterhalsI found this pyrenomycetous fungi in pine forest o
04-07-2025 20:12
Josep Torres
Hello.A fungus growing on the surface of a trunk o
20-06-2025 08:33
Josep Torres
Hello.Small, blackish, mucronated surface grains s
28-06-2025 16:00
Josep Torres
Hello.A tiny fungus shaped like globose black grai
04-07-2025 12:43
Castillo Joseba
me mandan el material seco de Galicia (España)
03-07-2025 18:40
Castillo Joseba
me mandas el material seco de Galicia (España) re
03-07-2025 20:08
Francois Guay
I found this interesting yellowish asco growing on
01-07-2025 23:37
Josep Torres
Hello.A Pleosporal symbiotic organism located and
02-07-2025 17:26
Yanick BOULANGERBonjourRécolté sur une brindille au fond d'un fo
Hi All, I found this Octospora growing with liverworts and mosses while gardening. In the Octospora.de website it seems to agree closest with megapolitana but it is on clayey rather than sandy soil andthe paraphyses are not hooked.
Octospora cf megapolitana, Refail Fields, Pentraeth, Anglesey, 4/4/25 & 6/4/25
Apothecia solitary to gregarious, margin finely downy when young. Pinkish to orange. On rather compacted, clayey soil with liverworts and mosses.
Ascospores: 22x10, 22x11, 22x10.5, 21.5x12, 24x12, 22.5x11, 22x12, 22x12, 22x12, 22x11, 22x22x11, 21x11, 23x11.5, 21x12, 24x11.5, 22x11.5, 24x12, 25x12, 20x11, 22x12, 18.5x11, 19x11, 18.5x11, 21x11, 21x12, 24.5x10.5, 23.5x12, 21x11, 21.5x12, 20.5x11, 20x12, 21x11.
18-24.5x10-12
Ascospores ellipsoid, with two guttules. With evenly spaced hemispherical warts 0.5 wide and high. Occasionally with short ridges.
Asci (x400): 90x5, 85x6, 77x5, 83x7, 80x6, 103x7, 96x6, 90x7.5, 81x6, 84x8, 95x7, 74x6.5, 75x6.5, 70x7, 69x8, 71x7.5 175-240x12.5-20
Paraphyses: 7, 5, 5, 6, 6, 7, 6, 6, 7, 8, 7, 8 8, 12. Straight to curved, septate. Filled with pale yellow guttules towards the apex.
Excipular hyphae: Densely packed, with pale orange contents. Apices with amorphous substance.
Fine excipular hairs up to about 100x10.
Best wishes,
Charles.
Many thanks for your suggestion. O. bridei differs in having amazing, lemon-shaped spores. I should have mentioned that O. fissidentis also comes close and grows on clayey, shady spots like this taxon. It also has pinkish tones but doesn't appear to have excipular hairs.
Charles.
Quite a coincidence but today I actually came across O. bridei in a damp, shady spot in Llangni, again on Anglesey. Wonderful ascospores! It may well be a new British record.
Best wishes,
Charles.
Nice collection, I think this is most likely either O. fissidentis, O. ithacaensis, or some closely related undescribed species (both have paraphyses with distinct VBs and can have margin with these fine excipular hairs). There seems to be a shoot of Fissidens on your last photo but the nearby liverwort could also be the host, so verifying infection would be necessary to be sure what species it is.
Few photos of the two species are here:
https://photos.app.goo.gl/BzhdePwW9SYJ2D333
https://photos.app.goo.gl/yRsswn7jY4JxnVKh6
Best wishes,
Lukas
Many thanks for your helpful comments and info. Sorry for the delayed reply, I suppose I had more or less given up on further replies! I agree that's it's close to fissidentis, agreeing in Fb colour and ascospore ornamentation. What swayed more towards megapolitana was the larger ascospore size of this taxon but, as you say, it might be undescribed. I think I may have enough material for DNA extraction.
Best wishes,
Charles.