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13-12-2019 20:42

Götz Palfner Götz Palfner

Bonjour tous,Sorry, but as my French is crap, I wi

14-12-2019 10:09

Marc Detollenaere Marc Detollenaere

Dear forum,   On a decorticated trunk of Populu

11-12-2019 22:21

BERNARD CLESSE BERNARD CLESSE

Bonsoir à toutes et tous,Pourriez-vous me confirm

11-12-2019 23:29

Juuso Äikäs

I found these in a Picea abies dominated forest in

08-12-2019 11:01

Gilbert MOYNE

Bonjour, Un petit champignon que m'a remis Andgel

13-12-2019 16:20

Chris Yeates Chris Yeates

Bonjour tous this is an area I feel rather ignora

12-12-2019 23:42

Maren Kamke Maren Kamke

Hello together, can someone provide me with this

12-12-2019 18:36

Roland Labbé

Bonjours ! Voici un Trichoderma (Hypocrea) inconn

07-12-2019 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

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

11-12-2019 23:25

Ethan Crenson

Hello all,This was found by a friend in New York C

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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