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03-07-2020 17:47

Thomas Læssøe

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

27-06-2020 13:21

Hardware Tony Hardware Tony

I wondered if anyone could help me with this ascom

04-07-2020 14:34

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello, I would like to ask you for help with idet

03-07-2020 21:06

Castillo Joseba Castillo Joseba

me mandan el material seco,, recolectado en plante

03-07-2020 20:54

Castillo Joseba Castillo Joseba

me mandan el material seco recolectado en rama de

03-07-2020 22:51

Viktorie Halasu Viktorie Halasu

Hello,I'd like to ask for help with a lichen. In w

02-07-2020 21:45

Castillo Joseba Castillo Joseba

me mandan el material seco, recolectado en  tallo

02-07-2020 07:56

Garcia Susana

Hola, Agradecería vuestra ayuda para la identifi

02-07-2020 13:33

Garcia Susana

Hola, He recogido estos apotecios que crecían en

02-07-2020 16:05

Thomas Læssøe

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

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Bitunicate asco on very wet roots near a stream
Enrique Rubio, 03-09-2014 19:40
Enrique Rubio

Does anyone have an idea about these small (up to 0.5 mm), gregarious, ostiolate, globose, superficial, never inmersed, black, rough walled but glabrous pseudothecia growing on corticated roots (Prunus spinosa?) near the freshwater of a stream at the hill level?


The ascospores are hyaline, later greyish and finally greyish-brown and they seem to have smooth walls. The asci are bitunicate, 8-spored, narrowly clavate and they arise from croziers. The trabeculate peseudoparaphyses heve many anastomoses. Pseudothecial walls angularis.


Have you some idea for this fungus?


 


Thanks again


 

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Alain GARDIENNET, 03-09-2014 20:13
Alain GARDIENNET
Re : Bitunicate asco on very wet roots near a stream

Hi Enrique,


Really no subiculum ?


Ascospores seem to be very slightly striated, aren't they ?


Alain

Enrique Rubio, 03-09-2014 20:36
Enrique Rubio
Re : Bitunicate asco on very wet roots near a stream

Hi Alain


Yes. You are right because they are some rest of a subiculum not well visible when the ascomata are wet, but yes when dried. And it's possible the ascospores are very fienelly striate, but very difficult to observe it with my optica.


What's your idea?


Thanks again!

Alain GARDIENNET, 03-09-2014 21:32
Alain GARDIENNET
Re : Bitunicate asco on very wet roots near a stream

My idea was Byssosphaeria schiedermayeriana, even if we can't see the usual apex.


In wet conditions, it can be hardly recognizable.


You can check it, it's just an idea, perhaps I'm wrong.


Alain


PS : ascospores are perhaps not striate

Enrique Rubio, 04-09-2014 13:35
Enrique Rubio
Re : Bitunicate asco on very wet roots near a stream

HI Alain


Perhaps Byssosphaeria is a good genus for my fungus but I think it's not schiedermayeriana because any ascomata has the typical periostiolar color and morphology. By the way I read Barr's paper on Herpotrichia and its allies, and I have not seen a Byssosphaeria species that matches with this fungus.


Thanks, Alain

Jacques Fournier, 04-09-2014 16:52
Jacques Fournier
Re : Bitunicate asco on very wet roots near a stream
like Alain I thought of Byssosphaeria schidermayeriana. It is tricky because the typical subiculum and orange apex most often lack when it is found on submerged wood. However the ascospores in Enrique's fungus are a bit small for B. schidermayeriana.
In that genus the asci are fairly long-stipitate, is it the case here?
Saludos,
Jacques

Enrique Rubio, 04-09-2014 18:25
Enrique Rubio
Re : Bitunicate asco on very wet roots near a stream

HI Jacques


Yes. The asci are long stipitate


Thanks for your replay