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05-05-2013 20:19

Maren Kamke Maren Kamke

Hello,I found this one on Quercus sp., I think. I

06-05-2013 21:35

Spooren Marco Spooren Marco

Hello,I'am looking for some lterature (about coelo

10-03-2013 11:10

Björn Wergen Björn Wergen

Hi again,do you also think that this collection ca

08-05-2013 14:52

hannie wijers

On hardung I found this vack frb. At first I could

07-05-2013 11:54

Miguel Ãngel Ribes Miguel Ángel Ribes

Another Mollisia? in wood without bark, no more th

06-05-2013 10:55

Yannick Mourgues Yannick Mourgues

Bonjour à tous.Qui aurait ces docs en pdf ? Ou qu

04-05-2013 22:20

Chris Yeates Chris Yeates

Bonsoir tousthere seems to have been a glut of cop

05-05-2013 14:25

Stefan Blaser

Hello everybody Here's already my next problem:

06-05-2013 00:07

Michel Hairaud Michel Hairaud

Bonjour, Je sollicite votre aide pour cette réco

05-05-2013 13:15

Stefan Blaser

Hello everybody Who can give me some enlightenmen

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Unknown pyrenomycete on Quercus sp.
Maren Kamke, 05-05-2013 20:19
Maren KamkeHello,
I found this one on Quercus sp., I think. I first throught it could be Alnus sp. because it lay in water in a "Erlenbruchwald", but there were also some oaks. The wood had no longer bark.
The fruitbodies are to 0,2 mm wide. The spores are big with 41-47 x 9 – 11 µm brown, with 5 septa, the cells on the ends are brighter than the others. The 3rd one slightly larger. Asci IKL negative 153-180 x22-25 µm. Paraphyses thin up to 1,5 µm.

Thank you for your help.


Regards Maren

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Jacques Fournier, 05-05-2013 20:31
Jacques Fournier
Re : Unknown pyrenomycete on Quercus sp.
Hi Maren,
this is Trematosphaeria wegeliniana, an aquatic species occurring on submerged wood or wood that has been submerged for long before being found on river banks. The ascospore wall is finely longitudinally striate but not always easy to make out.
Cheers,
Jacques
Maren Kamke, 06-05-2013 20:08
Maren Kamke
Re : Unknown pyrenomycete on Quercus sp.
Hi Jacques,
thank you very much. You are right, the spores are longitudially striate. I overlooked it under the first examination.
Do you know something about the distribution of this fungus? I didn't find it in several databanks.
Regards
Maren
  • message #23313
Björn Wergen, 06-05-2013 20:37
Björn Wergen
Re : Unknown pyrenomycete on Quercus sp.
Hi Maren,

look also here:
Trematosphaeria wegeliniana

We'd found this species only once in Saxony (N. Heine), never in my region or somwhere else. You also have to know that I am working on aquatic pyrenomycetes only since last year october. I think T. wegeliniana is not frequent. For more pictures, look for it in the ascofrance database.

regards,
björn
Jacques Fournier, 06-05-2013 21:06
Jacques Fournier
Re : Unknown pyrenomycete on Quercus sp.
I agree with Bjorn it is not evenly distributed but not rare when present, for example around Niort (western France). I never found it in the Pyrénées where I have been doing extensive collecting of freshwater fungi. It probably has specific ecological requirements that are still unknown.
Maren, take care if you begin to focus on such fungi you will forget about others!
Cheers,
Jacques
Yannick Mourgues, 07-05-2013 14:08
Yannick Mourgues
Re : Unknown pyrenomycete on Quercus sp.
HI.
Found it in Deux-Sèvre in France and in Lozère. Both with ph<7. What about water's ph where you found it, Maren, Björn and Jacques ?
Yannick
Maren Kamke, 07-05-2013 20:40
Maren Kamke
Re : Unknown pyrenomycete on Quercus sp.
Hi,
thank you all for your comments.
With a short fungi-season and dry summers in Northern Germany I will probably look for more of these fungi. ... they have such beautiful spores :).
Yannick, I checked the ph in the water today, it is rather acid with 5,8.
Regards
Maren
Björn Wergen, 07-05-2013 22:31
Björn Wergen
Re : Unknown pyrenomycete on Quercus sp.
Thats a good question, Yannick, I will ask Norbert Heine to check pH. This would indicate a pH-dependency of aquatic pyrenomycetes. I have already thought about this, especially the appearance of these species in rivers with industrial influence. There is way to go I think :P

regards,
björn
Alain GARDIENNET, 08-05-2013 07:40
Alain GARDIENNET
Re : Unknown pyrenomycete on Quercus sp.

Hi friends,
Never found in my calcareous country. I've only one data from Mellasco (79 =Deux-sèvres, cf Yannick's data).
If it could grow in my land, I would have found it.   
Alain  

Björn Wergen, 08-05-2013 16:17
Björn Wergen
Re : Unknown pyrenomycete on Quercus sp.
Norbert Heine has written me via email, that pH was 7,2.

regards,
björn
Jacques Fournier, 08-05-2013 17:52
Jacques Fournier
Re : Unknown pyrenomycete on Quercus sp.
no doubt the pH of the water is an important ecological factor for many species but other parameters often make the picture more complicated. For instance I never found T. wegeliniana in my region where acid waters are frequently encountered on the northern slopes of the Pyrénées. I think associations and competitions between fungi also play an important role, much more difficult to evaluate than pH.
Good luck with aquatic ascos to you all!
Cheers,
Jacques