Accès membres

Mot de passe perdu? S'inscrire

19-07-2024 11:08

Miguel Ãngel Ribes Miguel Ángel Ribes

Good morningThis Scutellinia from July 9 grew at 1

19-07-2024 10:24

Kozak Robert

Date: 2024.07.16Loess gorges, on soil with a lot o

04-12-2020 18:23

Mirek Gryc

Hello allA friend sent me two collections of small

17-07-2024 11:33

Angel Pintos Angel Pintos

Hello, anybody body has:Pande A. and Rao, V.G. (1

16-07-2024 18:32

Andgelo Mombert Andgelo Mombert

Bonsoir, Un discomycète sur Liochlaena lanceolat

17-07-2024 22:37

Peter Welt Peter Welt

Who can help? Arx, J.A. von. 1973. Ostiolate and

17-07-2024 16:29

Andgelo Mombert Andgelo Mombert

Hello,A colleague found an unknown fungus on the s

17-07-2024 10:53

Hans-Otto Baral Hans-Otto Baral

I have a question about the scaling of illustratio

17-07-2024 08:35

Peter Welt Peter Welt

Who can help? Malloch, D.; Hubart, J.-M. 1987. An

11-01-2022 16:36

Jason Karakehian Jason Karakehian

Hi does anyone have a digital copy of Raitviir A (

« < 1 2 3 4 5 > »
Mollisia with positive KOH reaktion
Dirk Gerstner, 14-04-2023 21:29
Hello all,

I found this Mollisia on 12.04.2023 on an approx. 20mm thick, partly debarked branch of Betula.
The branch had fallen off quite freshly.
Apothecia ca. 0.5 -1mm, max 1.5mm diameter, with in my opinion slightly felty outside. Inside, light, steel-grey/blue.
Asci ca. 45-50 x 5-8 ym, IKL+bb, hooks - (I think I did not see any).
Paraphyses positive with KOH 3%, partly still with yellow content, partly also in the preparation.
Marginal hairs multicellular.


Spores 8-9 x 2,4-3ym, the problem is that I did not find any free spores.


What is your opinion? I had toyed with the idea of M._olivascens/ M._perelegans, but have no experience with the species. :-)


Many thanks in advance.


Kind regards
Dirk


 

  • message #75857
  • message #75857
  • message #75857
  • message #75857
  • message #75857
  • message #75857
  • message #75857
  • message #75857
Lothar Krieglsteiner, 15-04-2023 03:57
Lothar Krieglsteiner
Re : Mollisia with positive KOH reaktion
Hello Dirk, 
in my opinion this is not M. olilvascens which has larger apothecia with more pronounced longer haiirs (it mainly grows on thick Quercus logs). 
Your specimen should belong in the complex around M. fusca, but for typical M. fusca the spores are somewhat too small and too poor of oil. With the key of Andreas Gminder I come to M. "pyrenopezizoides" or to M. "conifericola". A problem: both are provisional taxa not yet published. Perhaps Andreas can say more?
Best regards, Lothar

Hans-Otto Baral, 15-04-2023 07:36
Hans-Otto Baral
Re : Mollisia with positive KOH reaktion
The cupulate apothecia indeed resemble those of M. olivascens (M. elegantior is KOH- and has larger spores), but my measurements of 5 finds had longer and narrower asci: *(55–)60–85(–89) × (4.7–)5–5.4(–6) ?m {5}. Maybe your apos are a little too immature and would turn flatter, but the margin is strange. I would assume that croziers are present, this should be clarified. M. fusca has prominent, rather thick and thick-walled brown anchoring hyphae, not sure if this is the case here. M. pyrenopezizoides is now M. scopiformis (see our article in Boletus). The margin there does not have such elongate elements and the spores are distinctly cuneiform (basally tapered and acute).
Dirk Gerstner, 15-04-2023 09:18
Re : Mollisia with positive KOH reaktion
Hello Lothar, hello Hans-Otto,

Thank you very much for your exciting answers.
The apos really don't seem to be properly ripe, as I didn't see any free spores.
The immature asci I measured were all no longer than 50 ym long and about 6-7ym wide.
I saw thick-walled hyphae, but due to lack of experience I did not attach any great importance to them and did not photograph them.
On the macro picture through the stereo loupe I think I see dark subiculum.


The thing with the hooks is not always so easy. :-), but I am attaching a picture.


Greetings Dirk


 

  • message #75860
  • message #75860
Hans-Otto Baral, 15-04-2023 10:54
Hans-Otto Baral
Re : Mollisia with positive KOH reaktion
Your lower arrow shows a splendid crozier!

Your figured ascus looks pretty mature, but it would be good to have free spores which probably swell a little compared to inside a turgescent ascus.

Ingo Wagner and also I suggest to keep the fungus moist for some days, this usually helps.
Bernard Declercq, 15-04-2023 16:58
Bernard Declercq
Re : Mollisia with positive KOH reaktion
Interesting info!
Who made the new combination Mollisia scopiformis? (I guess the answer should be found in mentioned Boletus paper).

Regards,

Bernard
Hans-Otto Baral, 15-04-2023 17:07
Hans-Otto Baral
Re : Mollisia with positive KOH reaktion
It's made in IF but discussed in

Wagner, I.; Baral, H.O. (2021). Mollisia scopiformis, ein Weichbecherchen bekommt einen neuen Namen. Boletus 42(1): 57–63.

I have an English version which I hope will soon be downloadable from my website.
Bernard Declercq, 16-04-2023 09:26
Bernard Declercq
Re : Mollisia with positive KOH reaktion
Hello Zotto,

Eine deutsche Version würde genügen, wenn möglich.

Grüsse,

Bernard
Ingo Wagner, 16-04-2023 20:40
Ingo Wagner
Re : Mollisia with positive KOH reaktion
Hello Bernard!

For the german version from Mollisia scopiformis follow this link:
https://asco-sonneberg.de/pages/ueberblick/artikel-i.-wagner.php

Greetings
Ingo W
Bernard Declercq, 18-04-2023 10:25
Bernard Declercq
Re : Mollisia with positive KOH reaktion
Vielen Dank, Ingo.

Bernard
Dirk Gerstner, 18-04-2023 23:28
Re : Mollisia with positive KOH reaktion
Hello all,

One/two apos have survived the post-ripening, or have grown back and also formed spores.
Spores [95% - 22 - QPr - v - H2O(nat) ]
= 11 - 12,8 - 14,5 x 2,3 - 2,8 - 3,4 µm
OCI= 1-2, partly with larger droplets.
Anchor hyphae or subiculum abundant.


I think this could already represent Mollisa_fusca or?


And again many many thanks for your help, the exciting discussions and answers.
Best regards
Dirk


 

  • message #75889
  • message #75889
Hans-Otto Baral, 19-04-2023 07:15
Hans-Otto Baral
Re : Mollisia with positive KOH reaktion
Your spore photos are splendid, only I arrive at a width below 3 µm for all spores, according to the scale.

M. fusca is a not easily recognized species, which suggests the diverse interpretation in GenBank in comparison with Ingo Wagner's sequences. With this understanding I think this could be identified tentatively as M. fusca.

My understanding concerns a species with strong yellow reaction (extrusion into the medium), thick-walled (0.5-1.5 µm) anchoring hyphae measuring about 4-6 µm in width, vesiculous marginal cells, and spores of 12-17 x 2.4-2.7 µm with an number of small LBs near each end. I rely herewith on my drawing HB 4426, on Alnus incana near Tübingen (Schönbuch). Whether this corresponds to the original M. fusca of Persoon probably nobody can say.