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10-08-2022 15:45

Pierre-Yves Julien

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

04-07-2022 18:45

Enrique Rubio Enrique Rubio

I can find no suitable answer for this white Bryos

11-08-2022 08:16

Josep Torres Josep Torres

Hola.Un muy diminuto Pirenomyceto sobre un tronco

11-08-2022 00:45

Stefan Jakobsson

On a thin deciduous stick (Salix/Alnus/Betula) on

10-08-2022 09:11

Josep Torres Josep Torres

Hola.Un Piremomyceto recogido este pasado domingo

10-08-2022 18:45

François Bartholomeeusen

Good evening all, On 5 August 2022, a friend gave

09-08-2022 20:06

Stephen Mifsud Stephen Mifsud

I have found an interesting aspergillus on flowers

06-08-2022 22:20

Marcus Yeo

I found this ascomycete today on dead leaves of Er

16-07-2022 17:01

Zetti Mario

Hi, I am doing some work with microfungi and durin

02-08-2022 17:48

Pierre-Yves Julien

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

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Bitunicate asco on Betula
Enrique Rubio, 19-04-2012 20:37
Enrique RubioHi again

Do you know this bitunicate ascomycete with inconspicuous inmersed stromata with 1-2 pseudothecia, erumpent trought the bark of Betula small branches? 
Spores are inequally two celled and their walls are longitudinally striate (only visible in Melzer). They have some pseudosepta too.
I don't know what genus belongs this fungus  
Many thanks again
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Alain GARDIENNET, 19-04-2012 21:18
Alain GARDIENNET
Re : Bitunicate asco on Betula
Hi Enrique,
You should look in the Pleomassariaceae. Perhaps it could be Pleomassaria siparia = Splanchnonema siparium but striate ornementation reminds me at other species which occurs on other hosts.
I will research more.
Alain
Alain GARDIENNET, 19-04-2012 21:22
Alain GARDIENNET
Re : Bitunicate asco on Betula
I agree with René to say it isn't siparia. Personnaly, I thought at S. quercicola (on Quercus) which has striate ascopores, as yours.
Alain
Alain GARDIENNET, 19-04-2012 21:26
Alain GARDIENNET
Re : Bitunicate asco on Betula
I think now it could be Splanchnonema argus. It occurs on Betula.
I let you verify.

Alain
Chris Yeates, 19-04-2012 21:49
Chris Yeates
Re : Bitunicate asco on Betula
Hello Enrique

if it is S. argus keep an eye out for the distinctive anamorph Myxocyclus polycystis:

best wishes

Chris
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Norbert Heine, 20-04-2012 00:42
Norbert Heine
Re : Bitunicate asco on Betula
Hi Enrique,

I'll give you a portrait of Splanchnonema argus and the anamorph Myxocyclus polycistis.
(By the way - fine photo, Chris!)

Some days ago I found this two species together on Betula - Twigs.
The spores of Splanchnonema argus were 60-72 x 14-17µm.
Now you can compare.

Best wishes

Norbert

PS: And here you can read something more:

http://www.ib-pan.krakow.pl/pubs-pdf/Polish%20Botanical%20Journal/2010/PBJ55-2_s373-380.pdf?
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Enrique Rubio, 20-04-2012 16:50
Enrique Rubio
Re : Bitunicate asco on Betula
Many thanks to all

I think my fungus is not S. argus because my ascospores with striate walls are not encapsulated.

I was looked for S. striatutulum and S. quercicola, as Alain and René said, and I think that S. quercicola is a good possibility. Do you know if this fungus has been collected in Europe?


Enrique