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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

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

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Yellow inoperculate on Frullania dilatata
Edvin Johannesen, 12-05-2022 17:27
Edvin JohannesenApothecia 0.2-0.5 mm in diam., slightly downy excipular surface. Asci ca. 45-60 x 6-7 microns, ascus tip IKI+ (blue) in Lugol, often curved, 8-spored and bi-seriate (as far as I can see- not many ripe asci). Released spores ellipsoid with somewhat pointed apices, multiguttulate (in KOH), aseptate, hyaline, ca 11-14 x 3 microns (all measures in KOH). Paraphyses numerous, filiform, 1-1.5 microns broad.

I have sacrificed only one medium-sized apothecium, so no in-depth study. My impression is that there are not so many yellow inoperculates on Frullania.  Suggestions appreciated.

Thanks.
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Hans-Otto Baral, 12-05-2022 18:08
Hans-Otto Baral
Re : Yellow inoperculate on Frullania dilatata
As the spores are multiguttulate, Bryoscyphus turbinatus is excluded. So far I have no other idea. A pity that the elements are not alive, e.g. the paraphyses.
Lothar Krieglsteiner, 12-05-2022 19:07
Lothar Krieglsteiner
Re : Yellow inoperculate on Frullania dilatata
unfortunately one cannot see much on the micro-pictures. But macroscopically it reminds me a bit of "Luteodiscus" or however these fungi will be called. The spores are perhaps too large for this, but as I said before: one cannot see much ...
Yours, Lothar
Hans-Otto Baral, 12-05-2022 20:38
Hans-Otto Baral
Re : Yellow inoperculate on Frullania dilatata
Good idea, Lothar! That should not be too difficult to check. A minute drop of 0.5-5% KOH on an apo should produce a pink colour when it is Luteodiscus.
Edvin Johannesen, 12-05-2022 22:57
Edvin Johannesen
Re : Yellow inoperculate on Frullania dilatata
Thanks, guys. I have sacrificed one more and I think it is fair to say that it turned pink with a drop of KOH.
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Edvin Johannesen, 12-05-2022 23:03
Edvin Johannesen
Re : Yellow inoperculate on Frullania dilatata
I tried to take better photos of spores (in asci). Hope it helps a bit. This is the KOH treated apo microscoped in a drop of water after rinsing. Scale in these photos are 2.5 microns between lines. It fits quite well what you have called Luteodiscus pleurozii. It seems this is still a provisional name.
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Lothar Krieglsteiner, 13-05-2022 09:09
Lothar Krieglsteiner
Re : Yellow inoperculate on Frullania dilatata
yes, Luteodiscus as well is a provisional name, too.
Hans-Otto Baral, 13-05-2022 12:16
Hans-Otto Baral
Re : Yellow inoperculate on Frullania dilatata
Hi Edvin

what did you do with your dirty microscope? Splendid photos! I can only agree with Luteodiscus bryophilus, as we cal it at the moment. My folders represent totally only 2 species so far, one with IKI blue and one with IKI red asci.

Now I would be glad if you send me collection data. We have numerous collections in the list and map but yours would add to the puzzle.

Zotto
Edvin Johannesen, 13-05-2022 12:42
Edvin Johannesen
Re : Yellow inoperculate on Frullania dilatata
Ha ha! You are right that the microscope may need a cleanup, but I guess the improvement is largely bacause I had some more time :-)

I will send you the collection data per email.

Thanks again to both of you.