
02-07-2025 18:45
Elisabeth StöckliBonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

02-07-2025 17:26
Yanick BOULANGERBonjourRécolté sur une brindille au fond d'un fo

02-07-2025 09:32

Hello, bonjour.Here is the paper I'm searching for

30-06-2025 16:56
Lydia KoelmansPlease can anyone tell me the species name of the

01-07-2025 23:37
Hello.A Pleosporal symbiotic organism located and

30-06-2025 12:09

This tiny, rather "rough" erumpent asco was found

30-06-2025 06:57
Ethan CrensonHi all, Another find by a friend yesterday in Bro

30-06-2025 14:45

This is a quite common species on Nothofagus wood

25-06-2025 16:56
Philippe PELLICIERBonjour, pensez-vous que S. ceijpii soit le nom co
Sorry.
If you find ascomata not dead, please try to show hamathecium including asci,and try to test peridium with KOH and acid lactic.
Alain

Despite the pretty poor quality of the fotos, there would be one good opininion: Trichonectria rubrofaciens, Ascospore shape and measurements are the same. Wall should be K negative.
Trichonectria ascomata tend to collaps in dry state, but are fit again when rehydrated with water.
I would wonder, if You could not find some integer ascomata. And not given in the fotos: there should be a corona of short, hyaline hairs/spikes concentreated near the ostiolum.
Only one foto disturbs my suggestion: there is a Fusarium- type conidium- which would not fit to Trichonectria, as its anamorphic state is Acremonium-type.
Franz
Concerning the hairs, one of character, I recently saw an high variability (with specimens on Flavoparmelia, Parmelia or Pleurosticta. Indeed we need more observations.
The good new is that more and more mycologists are going to find lichenicolous fungi !
Have a nice day,
Alain
I replied earlier but it didn't go through. I agree with the theory that this is likely Trichonectria rubefaciens, based on the long skinny spores and superficial ascomata (I don't think the hairs/protuberances at the top are very evident in dry, collapsed perithecia). The curved pointy spore struck me as a Fusarium-like conidium rather than a germinating ascospore but I'm not sure and it could be there incidentally. You can get multiple fungi infecting one lichen thallus after all.
I mostly responded to suggest you check out the following reference in case you don't have it:
Rossman AY, Samuels GJ, Rogerson CT, Lowen R (1999) Genera of Bionectriaceae, Hypocreaceae and Nectriaceae (Hypocreales, Ascomycetes). Studies in Mycology 42. https://www.studiesinmycology.org/sim/Sim42/full%20text.htm
Good luck,
Kendra