Marcelleina donadinii ?? - Forum ASCOFrance

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Marcelleina donadinii ??

Rubén Martínez-Gil, 13-12-2014 21:47

Hola a todos.

Subo unas imágenes de un disco negruzco que hemos encontrado hoy sobre tierra húmeda, en un bosquete de P. halepensis y carrascas,

Tiene esporas esféricas de 14,5-17,5 micras, con verrugas redondeadas muy pequeñas y aisladas.

No vistos croziers, IKI(-).

¿Qué os parece que puede ser?

Gracias por su ayuda.

Rubén

Rubén Martínez-Gil, 13-12-2014 23:34

Re : Disco negruzco

Hola de nuevo.

Subo unas imágenes del excípulo ectal y del margen del apotecio, así como de la base de las ascas bifurcada.

Un saludo

Rubén

Peter Püwert, 14-12-2014 01:45

Re : Disco negruzco

Hi,
may be Scabropeziza/ Plicaria spec.
Peter.

Beñat Jeannerot, 14-12-2014 06:00

Re : Disco negruzco

Adio Ruben,

I don't know but only for information, see description of Greletia (Smardaea) mülleri, an american species.

Beñat

Rubén Martínez-Gil, 14-12-2014 23:44

Re : Disco negruzco

Gracias Peter, Beñat.

He mirado Greletia mülleri y la ornamentación esporal es parecida y podría encajar, pero la medida esporal es algo menor.

Seguiré buscando.

Un saludo

Rubén

Lepista Zacarias, 15-12-2014 00:27

Re : Disco negruzco

Did you consider Marcelleina?
Hope you find the correct name for it.
Sincerely,
zaca

Iglesias Plácido, 15-12-2014 00:41

Re : Disco negruzco

Marcelleina pseudoanthracina ?

Plácido

Beñat Jeannerot, 15-12-2014 06:49

Re : Disco negruzco

Kaixo Placido,

M. pseudoanthrancina is a Peziza, see fungi non delineati by René.
And spores of it are around 7-8 µm, not 14-17 like here. A big difference, no ?

Agur bero bat,
Beñat

Nicolas VAN VOOREN, 29-09-2022 14:18

Re : Disco negruzco

Back to this old post...

For a project dedicated to some Marcelleina species, we had the opportunity to sequence Rubén's collection. A paratype of Marcelleina donadinii was also revised and sequenced, and appears to be the same as Rubén's fungus!
Except the spore size, slightly smaller, Ø (12.5) 13-15 µm, in the paratype, the other features agree with Moravec's description (1987). Note that Moravec's drawing of ascospores doesn't correctly render the small warts on the surface (its SEM photos are more informative).
Finally, this species seems to be a member of Discinaceae...

Rubén Martínez-Gil, 29-09-2022 15:31

Re : Disco negruzco

Hola Nico.
Gracias por la información.

Un abrazo
Rubén

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