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08-12-2019 20:38

PASCAL DUBOC

cupules <2mm à centre gris bleuté, face exter

08-12-2019 11:01

Gilbert MOYNE

Bonjour, Un petit champignon que m'a remis Andgel

07-12-2019 18:45

Laurens van der Linde Laurens van der Linde

Hallo i found the P atrovinosa with a slime specie

07-12-2019 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que hemo

06-12-2019 19:49

Edvin Johannesen Edvin Johannesen

Hi! Tiny, black, oblong stromata with pure white

27-11-2019 16:54

Rasmus Riis-Hansen Rasmus Riis-Hansen

Hi,I hope you can help med with this disc found a

05-12-2019 09:06

Valencia Lopez Francisco Javier

Hola amigosEstoy buscando este trabajo de la Errot

05-12-2019 19:35

Ibai Olariaga Ibarguren

Dear colleagues, I was wondering if anyone could

19-11-2019 18:05

Lothar Krieglsteiner Lothar Krieglsteiner

... under a twig of deciduous tree (likely Quercus

29-06-2011 22:52

Luc Bailly Luc Bailly

Encore trois ascos de la réserve naturelle domani

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Anthostomella on Fraxinus
Enrique Rubio, 13-03-2015 18:14
Enrique RubioHello again

I'd like to know your opinion about this (I think) Anthostomella species growing on small branches (20 mm broad) of Fraxinus excelsior lying on the ground, at the sea level (Botanical Garden of Gijón/Asturias/Spain).


The inmersed, gregarious, blackish, roundish or elliptical perithecia, 1.20-1.35 microns in diam., are singly, in pairs or small groups just beneath the bark with only the short necks protruding. Many times an stromatized blackish clypeoid structure is present over the perithecia.


Asci cylindrical, 145-155 x 7.5-8,5, unitunicate, with an apical cylindrical apparatus up to 3 microns long, deeply blueing in IKI, with 8 more or less uniseriate 2-celled ascospores that seem to have very small caps at the poles (that are not well visible in china ink). These ascospores, close to those of A. rubicola, are allways hyaline or only a few of them at most slightly brownish inside the asci.


I don't know any species that fits with my fungus


Have you any idea?


Thanks again

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Jacques Fournier, 13-03-2015 18:51
Jacques Fournier
Re : Anthostomella on Fraxinus
Hola Enrique,
I have seen two collections of your fungus from France, one on Quercus ilex twigs collected by Paul Leroy, the other one on Acer twigs by C. Lechat. Very few ascospores develop a pale brown cell lacking a germ slit, just like in A. rubicola. Likely an undescribed lignicolous counterpart of A. rubi, as you suggested. Frustrating.
Cheers,
Jacques
Enrique Rubio, 13-03-2015 18:59
Enrique Rubio
Re : Anthostomella on Fraxinus

Thanks again, Jacques


There exists some pyreno that you have not seen? I think not...


My material will be keeped in my herbarium. Maybe you will need it...

Enrique Rubio, 13-03-2015 19:22
Enrique Rubio
Re : Anthostomella on Fraxinus

Hi Jacques


How did you describe the small polar caps of the ascospores? Had your spores these elements?


 

Jacques Fournier, 13-03-2015 19:30
Jacques Fournier
Re : Anthostomella on Fraxinus
they apparently vanish at dry state, I did not see them in Indian ink on the material I have.
An important differential character from A. rubi migght be the tendency to cluster in small groups and to have well differentiated papillate ostioles.
Jacques
Enrique Rubio, 13-03-2015 19:37
Enrique Rubio
Re : Anthostomella on Fraxinus
It is possible, Jacques. But I have studied them in fresh condition and in indian ink without success
Jacques Fournier, 13-03-2015 19:41
Jacques Fournier
Re : Anthostomella on Fraxinus
I did not see them in water either, this is why I tried India ink.
Enrique Rubio, 13-03-2015 19:44
Enrique Rubio
Re : Anthostomella on Fraxinus
I think is water the best way
Jacques Fournier, 13-03-2015 19:52
Jacques Fournier
Re : Anthostomella on Fraxinus
OK you won!
Jacques