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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 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