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31-08-2025 17:32

Michel Hairaud Michel Hairaud

Bonjour, Pas d'identité trouvée pour cette réc

31-08-2025 19:41

Enrique Rubio Enrique Rubio

Hi to someone.I need to download this issue of Sve

31-08-2025 14:34

Thomas Flammer

I have found a Rutstroemia on abt. 2000 m on Alnus

29-08-2025 19:04

Thomas Flammer

Spores 21.2 - 26.2 x 8.3 - 11.3 µm - Q: 2.20 - 2.

30-08-2025 18:29

Joaquin Martin

Hi,I found this undetermined ascomycete on broadle

28-08-2025 17:24

Thomas Flammer

I know, that this is not the real topic of this fo

29-08-2025 05:16

Francois Guay Francois Guay

I think I may have found the teleomorph of Dendros

24-08-2025 21:59

Edmond POINTE Edmond POINTE

Bonsoir amis mycologues,Trouvé sur crottin de che

27-08-2025 12:02

Pavol Palo

Hello dear friendsI would like to ask for sharing

25-08-2025 17:37

François Freléchoux François Freléchoux

Bonjour,Nous avons trouvé samedi dernier à l'ét

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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