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09-01-2015 12:57

Alan Rockefeller Alan Rockefeller

I found this in a semitropical area of Queretaro,

11-12-2019 22:21

BERNARD CLESSE BERNARD CLESSE

Bonsoir à toutes et tous,Pourriez-vous me confirm

11-12-2019 23:29

Juuso Äikäs

I found these in a Picea abies dominated forest in

11-12-2019 23:25

Ethan Crenson

Hello all,This was found by a friend in New York C

05-01-2019 14:57

Edvin Johannesen Edvin Johannesen

These orange "jelly"-like apothecia grow at the ap

11-12-2019 16:42

BERNARD CLESSE BERNARD CLESSE

Bonjour à toutes et tous,Même s'il ne s'agit pas

05-12-2019 19:35

Ibai Olariaga Ibarguren

Dear colleagues, I was wondering if anyone could

09-12-2019 12:05

PASCAL DUBOC

Bonjour cette colonie de pustules orange sur vieu

09-12-2019 21:35

William Slosse William Slosse

Yesterday I found this species on the underside of

18-11-2014 11:05

Stip Helleman Stip Helleman

Dear friends,is there anyone who has for me the ar

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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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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