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09-08-2022 20:06

Stephen Mifsud Stephen Mifsud

I have found an interesting aspergillus on flowers

13-08-2022 17:18

Stephen Mifsud Stephen Mifsud

I assumed these are weak colonies of Neurospora on

18-08-2022 17:50

Thomas Læssøe

https://svampe.databasen.org/observations/10283042

10-08-2022 15:45

Pierre-Yves Julien

Récolte le 31/07/2022 – Ozoir-la-Ferrière (77)

02-08-2022 17:48

Pierre-Yves Julien

Récolte le 31/07/2022 – Ozoir-la-Ferrière (77)

16-08-2022 20:07

Bernard Declercq Bernard Declercq

Good evening,Who could be so kind to supply me fol

07-01-2014 23:04

Michel Hairaud Michel Hairaud

Bonjour à tous, Hi to all. This tiny bright yell

16-08-2022 15:50

Thomas Læssøe

https://svampe.databasen.org/observations/10283169

23-07-2022 20:47

Stefan Jakobsson

I made an abundant collection of some Preussia/Spo

15-08-2022 20:36

Marcus Yeo

While in NE Scotland recently I made a couple of 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