23-09-2025 13:31
Thomas Læssøehttps://svampe.databasen.org/observations/10534623
15-10-2025 16:39
Edvin Johannesen
These tiny (0.2-0.6 mm), white, pulvinate apotheci
03-10-2025 13:44
Riet van Oosten
Hello, Found by Laurens van der Linde on Populus
13-10-2025 19:05
Louis DENYBonjour forumSur tronc décortiqué de feuillu x,
11-10-2025 20:27
Marcel Heyligen
Found on a barked branch, 14 mm in diameter, of Ro
09-10-2025 22:14
S. RebeccaWe just had the Bavarian Mycology Conference in Au
10-10-2025 00:49
Ethan CrensonHello all, This was found last weekend on a hardw
Good eveningFound in Bern, Switzerland, near the river Aare on deer dung in culture, after 2 weeks.
I think it is a Melanospora species.
Perithecia roundish, about 350 my in diameter. Beak 250 to 500 my long, 50 my wide. Ascis very volatile. Spore-bearing part about 50 x 30 my with a clearly separated slender cylindrical stalk. 4 or 8 spores. Spores olive brown, elongated lemon-shaped, with a small germinal pore at both ends. No germinal fissure. Apical ends of the spore minimally hyaline.
Spores (19.6) 22 (23.1) x (11.2) 12 (12.8).
In von Arx & Müller - Die Gattungen der amerosporen Pyrenomyceten M. leucotricha is an option, but I am unsure.
Am I right with Melanospora and can someone help me with the species?
Greetings, Simon
Your mushroom may be a little immature, but I actually think it is Melanospora zamiae. M.brevirostris is close but the spores are larger and the beak is shorter.
Michel.
Thank you very much for your help.
In the meantime, I have noticed that M. leucotricha is a synonym of M. zamiae (Yasmina Marin-Felix et al. / MycoKeys 44: 81-122 (2018)).
In von Arx & Müller, die Gattungen der amerosporen Pyrenomyceten 1954, M. zamiae and M. leucotricha are two species. The main difference between the two species in this work is, in my opinion, the presence of germinal clefts in M. zamiae.
I have noticed that the very thin-walled spores of M. zamiae in cotton blue can colapse very quickly and give the impression of germinal clefts. Perhaps this was misinterpreted at the time.
Greetings, Simon
