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09-07-2020 00:39

Valencia Lopez Francisco Javier

Hola a todosEncontré este curioso ascomycete a me

08-07-2020 19:01

Nicolas VAN VOOREN Nicolas VAN VOOREN

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 16:47

Chris Yeates Chris Yeates

Bonjour tous While searching for the downy mildew

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

07-07-2020 21:07

Lieve Deceuninck Lieve Deceuninck

Dear members of this forumCould this find be Cheil

08-07-2020 16:41

Thomas Læssøe

Suggestions on this one would be very welcomesee:

06-07-2020 17:11

Thomas Læssøe

see: https://svampe.databasen.org/observations/10

02-04-2007 01:16

Patrice TANCHAUD

Bonsoir, Si on prend "Nordic Macromycètes" (tom

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Anthostomella (?) on Berberis
Enrique Rubio, 04-07-2013 14:02
Enrique RubioDear friends
 
Under a melanized, epidermial blackish tissue with inconspicuous perithecial mounds, we have collected these inmersed, isolated. not really stromatic perithecia up to 0.2 mm in diameter under a clypeate structure.
The long cylindrical 8-spored asci have an appical apparatus IKI bb and the brownish (at maturity) ascospores have a germ-slit full spore lenght and they have not visible appendages.


The fungus was on still attached branches of Berberis vulgaris at 1700 m of altitude.

With the classic keys I arrive to the genus Anthostomella. What do you think?    

Thanks again 

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Jacques Fournier, 04-07-2013 14:26
Jacques Fournier
Re : Anthostomella (?) on Berberis
Hola Enrique,
possibly Anthostomella but not a common species at first view. I checked Lu & Hyde's monograph to no avail. Could you be more specific about the clypei, are they separate or do they form a superficial pseudostroma by coalescing? Are the asci short or long pedicellate? Do ascospores have a mucilaginous sheath? something to test in India ink, just add a small drop to the edge of a water mount, it's better than to observe directly in India ink, otherwise dilute it.
Buena suerte!
Jacques
Enrique Rubio, 04-07-2013 17:49
Enrique Rubio
Re : Anthostomella (?) on Berberis
Hi Jacques


There are a superficial, thin and continuous blackish pseudostroma over the isolated perithecia, but at this level it seems to be thicker.
I have seen any mucilaginous sheath or appendages in china ink or nigrosine. The asci are shortly stipitate (i.e 55 microns long for the pars sporifera vs 35 for the stipes)
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Jacques Fournier, 04-07-2013 18:20
Jacques Fournier
Re : Anthostomella (?) on Berberis
thanks for the information, after checking the key in the monograph I failed to find a match. Anyway the continuous pseudostroma is not typical of Anthostomella. It rather recalls the fungi placed in Lopadostoma subgenus Anthostomopsis Rappaz (1995), as do the ellipsoid-equilateral ascospores. There are only three species in that subgenus, one L. flavoviride has ascospores that might fit but the peudostroma is said to be green black. Is that the case?
Tell me if you don't have Rappaz paper.
Cheers,
Jacques
Enrique Rubio, 04-07-2013 18:51
Enrique Rubio
Re : Anthostomella (?) on Berberis
Hi Jacques

Yes. I have Rappaz's papier. Maybe you are right because some little areas of the pseudostroma have faintly yellowish/greenish hues but only at the surface.
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Enrique Rubio, 04-07-2013 18:54
Enrique Rubio
Re : Anthostomella (?) on Berberis
Can you see them in the image?
Jacques Fournier, 04-07-2013 19:06
Jacques Fournier
Re : Anthostomella (?) on Berberis
hum, not striking! I would not advise you to use this name, maybe someone will have a better idea.
Cheers,
Jacques
Enrique Rubio, 04-07-2013 19:22
Enrique Rubio
Re : Anthostomella (?) on Berberis
Of course! They are not so conspicuous! 

Thanks, Jacques