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07-07-2020 13:34

Markov Sergey

I found this peziza sp. on loamy soil - on the gro

10-07-2020 17:50

Garcia Susana

Hola, Me gustaría vuestra ayuda para identificar

08-07-2020 00:01

Shane John

I would ask the indulgence of the group to perhaps

08-07-2020 16:47

Chris Yeates Chris Yeates

Bonjour tous While searching for the downy mildew

10-07-2020 14:26

Thomas Læssøe

Anybody in the know of eg Pseudoneottispora?See: 

09-07-2020 00:39

Valencia Lopez Francisco Javier

Hola a todosEncontré este curioso ascomycete a me

08-07-2020 19:01


Bonjour.Je ne remets plus la main sur mon tiré-à

08-07-2020 20:29

Juuso Äikäs

These were growing on a dead grass stalk in a fore

08-07-2020 18:21

Castillo Joseba Castillo Joseba

me mandan el material seco recolectado en mdera si

08-07-2020 10:59

Joanne Taylor

Hi there,Does anyone have a copy of the following

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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.
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.
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!