micros (scale=10 µm):

Hi gernot,
I think your fungus is Jahnula aquatica, species very common on submerged wood.
All the best ,
Christian

Hi Christian,

thank you very much!

Best wishes,

Gernot

Hi Gernot,
Jahnula aquatica is a very distinctive fungus, and your very good photos make the identification unambiguous. Great!
Jacques

Thank you, Jacques! I think once you have found a name for this species, you won't forget it anymore.

Best wishes,

Gernot (who is looking forward to reading your work about aquatic Ascomycota)

Cher tous,

I think, I have to thank Gernot for his question and Christian for his answer ... I have a file here named "Ignota genera", containing descriptions of Ascomycetes I could not place - for lack of time or knowledge - into a particular genus. The last entrance was a personal note on ... what just turned out to be Jahnula aquatica! It was found at the end of March this year on (very) wet wood in a swampy area in South Eastern Upper Bavaria. The species seems to have escaped the attention of German mycologists for a long time, although the type locality of Amphisphaeria aquatica Kirschstein & Plöttner (1906) was in Brandenburg.

Unfortunately my collection was very scanty, so I could not make an exsicccatum. But In this case I rely on my notes which are almost identical with Gernot's.

Best regards
Till

Hi Till,

it's always a nice feeling if you find something indeterminable and after some time somebody shows it in a forum. :)

I wonder if Jahnula aquatica is common in my area too, I'll keep my eyes open.

Best wishes,

Gernot