30-04-2024 16:22
François BartholomeeusenDear forum members,On April 25 2024, I found one f
03-05-2024 18:04
Riet van OostenHello, Found by Laurens van der Linde on Rubus fr
01-05-2024 23:22
Ethan CrensonHi all, Found late last week in a New York City p
29-04-2024 21:32
Robin IsakssonHi! Found in Sweden. Ascomata with haris, se
01-05-2024 12:54
F. JAVIER BALDA JAUREGUIHello, everyone.An idea for this pyreno, I found u
30-04-2024 19:43
Gernot FriebesHi!We observed this hyphomycete growing between le
29-04-2024 21:51
Mathias HassHi everyone, Found on attached branches of top pa
Hi!
I was wondering if someone could help with this aquatic fungus, found on a deciduous branch in a stream in Sweden. Perithecia immersed, elongated, with a more or less elongated neck. It has two-celled spores, hyaline when they are inside the asci, but brown, 4-celled and finely warty when senescent, 24-28 x 9-10 µm. Hamathecial filaments are cylindrical as well. The photos I send are taken from dead material.
Looking at the available literature I have, I wonder if it might conform to Lentithecium fluviatile, but the spores did not have any sheath when I looked at it fresh (I only used water) and the perithecia seem more elongated like in some Lophiotrema. Any other possibility?
Thank you in advance!
Cheers,
Ibai.
It reminds me more L. aquaticum then L. fluviatile.
The wood around ascomata seems to be dark-grey colored. Spores dimensions fits well : 25-30x8-12um in Zhang & Co. : http://www.fungaldiversity.org/fdp/sfdp/FD38-13.pdf
They are broadly fusiform with rounded ends, hyaline, 2-celled and four celled with age, constricted at the septum, they should have four refractive guttules before beeing dried.
You should check the presence or not of gel sheat in Indian ink. Not easy to see. Impossible to see in water only, I think.
We have here in France many recolts of Lentithecium cf. aquaticum lacking sheat around spores. Is it possible for you to send me a part of your recolt ?
Yannick
Thank you Yannick!
I meant in fact aquaticum, that was my conclusion but I then switched the names. You are right, the spores had 4 guttules when alive and the wood was grey tinged (but I see that colour often when I collect on wood pieces in streams).
Sure, I will try to make the material available to you. I will email you privately.
Cheers,
Ibai.