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Juuso Äikäs

I inspected a boggy depression at the side of a fo

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Thomas Læssøe

https://svampe.databasen.org/observations/10216745

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Riet van Oosten Riet van Oosten

Hello,Found in 2018 by Willy Heimeriks.Not many do

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Thomas Læssøe

https://svampe.databasen.org/observations/10279374

12-07-2022 07:46

Edouard Evangelisti Edouard Evangelisti

Dear all,I am wondering if you could advise on the

11-07-2022 18:41

François Bartholomeeusen

Good evening to all,At the dried out edge of a swa

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Mirek Gryc

HiUnfortunately, I have a problem with the interpr

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Hans-Otto Baral Hans-Otto Baral

Hello does someone have access to the following p

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Zuidland Peter

Hello all,I have this which I find only on the dea

05-06-2022 01:26

Andreas Gminder Andreas Gminder

Hello,we found today in a montain spruce forest in

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Seynesia (?) on Arundo donax
Enrique Rubio, 16-05-2016 15:43
Enrique RubioI'd like your opinion on this Seynesia (¿?) species growing on Arundo donax stems at the sea level, at the north of Spain.

The blackish, roundish, inmersed perithecia, single or in pairs, are more or less roundish, up to 1 mm in diam., beneath a thin clypeus. Only the papilla is visible on the peridermis of the host, but it is not surrounded by teeth-like flanges as described for Seynesia nobilis.


The 8-spored asci  have a wedge-shaped, amyloid, subapical apparatus. The living paraphyses are filled with a conspicuous, refractive, oily content that not dissapear in NH4OH. The ascospores are brownish at maturity, smooth-walled, two celled, constricted at the septum, with a full length germ slit in each cell, a thin mucilaginous sheath surrounding the ascospores and an obtuse or short cylindrical, not really conical, cap-like appendage at each pole of the spore.


I feel this species could be into the genus Seynesia, but I think it doesn't fit well with the somewhat known species of this genus (i.e. S. nobilis)


What is your opnion


Many thanks in advance

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  • message #42735
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Jacques Fournier, 16-05-2016 16:15
Jacques Fournier
Re : Seynesia (?) on Arundo donax
Hola Enrique,
I was sure Arundo would give you nice suprises!
It's obviously a Seynesia and I find it fits fairly well in S. nobilis. Do you have Hyde's paper (1995) in Sydowia? He states that the teeth-like flanges around the clypeus are not always present, likely dependent on the texture of the host. Only the paraphyses with refractive content do not match.
I never encountered S. nobilis, thus I cannot discuss any more.

Saludos,

Jacques
Enrique Rubio, 16-05-2016 16:23
Enrique Rubio
Re : Seynesia (?) on Arundo donax

Hi Jacques


Many thanks for your help and for advising me the study of Arundo