Accès membres

Mot de passe perdu? S'inscrire

02-07-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

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

30-06-2025 16:56

Lydia Koelmans

Please can anyone tell me the species name of the

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

30-06-2025 12:09

Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 06:57

Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 19:05

ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

30-06-2025 14:45

Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

25-06-2025 16:56

Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

29-06-2025 18:11

Ethan Crenson

Hello all, A friend found this disco yesterday in

28-06-2025 17:10

Peter Welt Peter Welt

I'm looking for: RANALLI, M.E., GAMUNDÍ, I.J. 19

« < 1 2 3 4 5 > »
Whitish inoperculate on the liverwort Aneura pinguis
Edvin Johannesen, 25-03-2023 14:42
Edvin JohannesenI have received this dried specimen for microscopy. In the fresh state the apothecia are (purplish-greyish) white, but they become black in the dry state (see photos of both states). On rehydration they appear somewhat gelatinous, dark purplish brown.
Hymenium is a brown, dense palisade. Excipulum is paler brown, I would say textura epidermoidea (?). Asci and spores appear dead. Mature spores are brown, 20 x 6 micr., ellipsoid/allantoid, aseptate or I suspect becoming 1-septate (hard to see).  Asci IKI negative. 
All micro images in water.
I have not been able to find any bryophilous inoperculates with such brown spores.

Any suggestions?
  • message #75691
  • message #75691
  • message #75691
  • message #75691
  • message #75691
  • message #75691
  • message #75691
  • message #75691
Georges Greiff, 29-03-2023 13:03
Re : Whitish inoperculate on the liverwort Aneura pinguis
Very interesting collection. I have not seen any inoperculates on liverworts with brown spores. It may well be undescribed. Bryoscyphus is superficially similar and seeing living paraphyses would have helped. Bryoscyphus conocephali agg. is on liverworts in similar habitats. It is not that but it might be related.

George
Edvin Johannesen, 29-03-2023 14:55
Edvin Johannesen
Re : Whitish inoperculate on the liverwort Aneura pinguis
Thanks for your opinion, Georges.  I will have another attempt at looking for paraphyses (I doubt they will be alive). I assume that the spore color is not a result of necrosis or some other process?
Georges Greiff, 29-03-2023 15:19
Re : Whitish inoperculate on the liverwort Aneura pinguis
Dear Edvin,

I have not noted brownish spores in any of the herbarium material of Bryoscyphus that I have examined, but that doesn't mean it won't happen. The darkening of the dry, old apothecia is a common occurrence Bryoscyphus, including in B. conocephali I collected recently. Perhaps this pigment has gone into the spores. I can check if this darkening happens in spores of my B. conocephali.

Unfortunately the paraphyses will be dead so you won't see the VBs. Perhaps now only sequencing can place this collection with more certainty within one of the bryophilous Leotiomycete groups. They are tricky even when fresh.

All the best,
George
Edvin Johannesen, 29-03-2023 15:40
Edvin Johannesen
Re : Whitish inoperculate on the liverwort Aneura pinguis
It would be great if you could check this - thanks!