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07-12-2025 16:07

Arnold Büschlen

Hallo, ich habe in einer Moos-Aufsammlung (epiphy

08-12-2025 21:04

Mark Stevens

"Hello everyone,I'm relatively new to microscopy (

09-12-2025 12:06

Andgelo Mombert Andgelo Mombert

Bonjour,Je recherche l'article concernant Hypobryo

08-12-2025 18:59

Lothar Krieglsteiner Lothar Krieglsteiner

.. found by a seminar-participant, I do not know t

08-12-2025 21:18

Buckwheat Pete

Hello everyone, Is it possible to at least approx

07-12-2025 17:43

Malcolm  Greaves Malcolm Greaves

This Helvella was in mixed woodland. Uniform cupul

08-12-2025 17:37

Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

16-03-2014 22:00

Ralph Vandiest Ralph Vandiest

Hello,I found this species a few months ago but ha

08-12-2025 13:39

Thomas Læssøe

https://svampe.databasen.org/observations/10572899

07-12-2025 22:43

Andreas Millinger Andreas Millinger

Good evening, tried to determine with Munks Valsa

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Marcelleina
Zuzana Sochorová (Egertová), 11-10-2014 22:35
Zuzana Sochorová (Egertová)Good evening,
I found this Marcelleina today.
Macrocharacters: 2 mm acroos, deep violet when fresh, pale violet when drying, sessile, rounded, plane, with a distinct margin.
Locality: Moravia, washed off soil in a forest (Picea, Acer, Fraxinus, Abies). The locality is rather acid, but a castle is nearby, so maybe there could be some pieces of limestone...
Spores globose, 9-10 micrometers, hyaline, with one guttule, ornamented by usually isolated short ridges.
Asci containing 8 spores in 1 or 2 rows, 180-205 x 13-15,5 micrometers.
Paraphyses 2,5-4,5 micrometers broad, sometimes slightly curved at apex.
Excipulum of globose-angular cells 12-26 micrometers broad.
In the article by Jiri Moravec the picture of spores of Marcelleina georgii seems to me to be the most similar. Also the date of find would speak for this species. However, the paraphyses are only very slightly enlarged in my fungus and the ornament is well coloured in cotton blue, which is in contradiction to the key. Can someone give an advice?
Thanks a lot,
Zuzana
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Beñat Jeannerot, 12-10-2014 02:57
Beñat Jeannerot
Re : Marcelleina
Adio Zuzana,

In my opinion, this is M. rickii.
Sporal ornementation is typical.
In the Moravec key, with this ornementation, I think it's directly to 4 ("complete or incomplete irregular reticulum") and directly to rickii, because "incomplete".
Anyway, this is my conception of this species.

Beñat
René Dougoud, 12-10-2014 08:03
Re : Marcelleina
Chère Zuzana,

Les ascospores sont typiques de M. rickii (Rehm Graddon. Selon J. Moravec, les représentations d'ascospores de M. georgii montrent des crêtes très courtes, rarement aussi longues que celles de M. rickii.

Amicalement

René
Zuzana Sochorová (Egertová), 12-10-2014 08:08
Zuzana Sochorová (Egertová)
Re : Marcelleina
Thank you Benat and René :-)
I jumped to "isolated ridges", I though there should be more anastomoses in M. rickii.
It´s strange I have never found Marcelleina in CZ before the French meeting and since the time already twice (the first one was M. persoonii).
Best regards, Zuzana
René Dougoud, 12-10-2014 09:06
Re : Marcelleina
Chère Zuzana,

Marcelleina rickii est sans doute l'espèce la plus répandue. En trouvant en premier M. persoonii, tu as eu de la chance!

Marcelleina pseudoanthacina (Donadini) Kristiansen & J. Moravec n'est pas un Marcelleina. En effet, j'ai étudié une récolte dont les asques se coloraient faiblement en bleu dans le MLZ et une deuxième récolte dont les asques ne présentaient pas de réaction. La réaction aléatoire des asques chez certaines espèces de Pezizaceae est connue. J'ai pu le relever à plusieurs occasions. Je présente Peziza pseudoanthacina Donadini dans Fungi non delineati (dont tu as déjà reçu un PDF) avec, dans "Observations", des éléments qui, en plus de l'amyloïdie, rapproche bien ce champignon du genre Peziza ou (?) Plicaria. Voir aussi mes remarques sur ces derniers genres, dans ma publication, et les travaux de Egger (1987) et Norman et Egger (1999).

Amitiés

René
Zuzana Sochorová (Egertová), 12-10-2014 14:38
Zuzana Sochorová (Egertová)
Re : Marcelleina
Dear René,
thanks for information. It´s interesting - Peziza with globose spores...

Jiri Moravec writes in his article from 1969 "Marcelleina persoonii is probably a quite abundant species in the Czechoslovakian area", but for me all Marcelleinas are rare fungi.
Best regards, Zuzana