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09-12-2025 12:06

Andgelo Mombert Andgelo Mombert

Bonjour,Je recherche l'article concernant Hypobryo

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 (

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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Anthostomella ?
Garcia Susana, 13-07-2020 12:06
Hola,

Me gustaría saber vuestra opinión acerca de estos hongos.

Son peritecios inmersos, aislados o agrupados (2-3), con clípeo, creciendo sobre tallo de Scirpoides holoschoenus.

Microscopicamente presenta ascas octosporadas, con pie corto, de 80-110 x 12-18um, y aparado apical amiloide discoide.

Las paráfisis celulares, anchas (hasta 5.5um).

Las esporas asímetricas, he conseguido ver en algunas esporas una hendidura germinativa recta a todo lo largo de la espora, en su lado más plano.

Pienso que se trata de una especie de Anthostomella, pero no logro identificarla.

Gracias, saludos

Susana
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Jacques Fournier, 14-07-2020 15:54
Jacques Fournier
Re : Anthostomella ?
Dear Susana,

your images are excellent and leave no doubt it is an Anthostomella.

I used the key to worldwide species proposed by Lu & Hyde (2000) but I did not reach a satisfying match.

The point is that the spores do have a tiny cellular appendage, maybe two, that can be very easily overlooked. Anyway both options lead to a dead end.

The presence of a gelatinous sheath is also a discriminating character thay would be useful. Your last image suggests the presence of such a wide sheath winthin the ascus but it woukd be more informative to show the sheath surrounding free ascospores in India ink.

It's a difficult genus with species often just delimited by minor morphological differences. Also many undescribed species...

Cheers,

Jacques
Garcia Susana, 15-07-2020 23:47
Re : Anthostomella ?
Gracias Jacques,

Ya probé a teñir las esporas con nigrosina, y lo he vuelto a hacer, pero no veo que tengan vaina alrededor (o por lo menos no consigo distinguirla).

En cuanto a apendices tampoco observo ninguno. En algunas esporas veo una especie de apículos en el estremo.

¿Podrías enviarme el artículo que mencionas de Lu & Hyde (2000)?

Tendré que archivarla como Anthostomella sp.

Susana
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Jacques Fournier, 17-07-2020 15:26
Jacques Fournier
Re : Anthostomella ?
sorry Susana,

it is a big book nearly 400 pp and I don't have a pdf version. Maybe someone on the forum does...

Cheers,

Jacques
Garcia Susana, 17-07-2020 21:56
Re : Anthostomella ?
Ok, gracias de todos modos.

Susana