15-09-2025 14:40
Nicolas VAN VOOREN
Hello.I'm searching for a digital copy of the seco
14-09-2025 22:16
Philippe PELLICIERApothécies petites jusquà 3 mm, oranges, avec de
13-09-2025 14:01
Thomas Flammerdark brown apothecia, splitIKI-Spores biguttulate
10-09-2025 17:18
Blasco Rafael
Hola, encontre este estiercol de vaca estos apotec
13-09-2025 14:10
Wim de GrootWe found this hymenoscyphus on rubus fruticulosis.
11-09-2025 16:57
Jason Karakehian
Our revision of Marthamycetales (Leotiomycetes) is
10-09-2025 23:53
Marcel Heyligen
Found on Robinia pseudoacasia together with Diapor
02-09-2025 11:34
Thomas Læssøehttps://svampe.databasen.org/observations/10527903
Found on cattle dung.Ascomata: scattered, semi-immersed, subglobose.
Asci: 78-115x13-16 um; 8-spored; clavate, long stipitate.
Spores: (21.5-) 23.8-25.7x5.2-6.1 um; transversly septate; deeply constricted; germ slit parallel; gelatinous perisporium absent. Terminal cells are longer than middle ones. Middle cells barrel-shaped, wider than long and usually equal in size.
The examined sample is similar to Preussia terricola Cain. But, I have doubts about the size and shape of the ascospores.
I would be grateful for your ideas and comments.
Regards,
Yulia
no, this is not Preussia terricola which has spores with mid-cells longer than broad.
The only Preussia with mid-cells broader than length I know is Preussia typharum.
But the spores of your found seems a little bit too small for this species!
I know it with spores mostly 28-32 x 7-9 but also 26-30 x 6-7 µm.
Maybe that there is an error in your measurement?
Or you did find a small spored variation?
Or a new species which should be called "Preussia minitypharum".;)
Best regards, Norbert
I did'nt know this genus "Preussia". the photos are very nice to observe.
Does somebody can provide me a key for the genus Preussia ?
Looking for it on the web I found somewhere a synonymy with certain species of "Sporormiella",
are the 2 genus synonymous ?
Thanks in advance.
Michel
michrimbaud@aol.com
Preussia-Cain-Can.-J.-Bot.-1961-0001.pdfVery interesting documents.
You're right. At first I also thought about Preussia typharum. But the spores is too small. I also doubted my measurements. I took measurements several times, checked the calibration. My measurements are correct. I'm also confused by the shape of the middle cells. I like the idea with a new species :)
Regards, Yulia.
Thank you! Your ideas and comments are also interesting. I also assume that in Preussia / Spormiella the size and shape of the spores may vary depending on maturity. But how much they change is a question. Will the cells change from barrel-shaped or hemispherical to cylindrical? I'll try to revise my samples a little later. I think it is necessary to study the spores in the later stages of maturity.
Regards, Yulia.
The question of Preussia / Sporormiella is quite debatable.
In recent years, in articles based especially on the results of phylogenetic analysis, these two genera have been synonymising. A number of researchers do not accept this because morphologically these taxa are quite different.
I have a number of works on these two genera. There are articles with keys or just with illustrations and diagnoses. One of the main devotees of Preussia is the work of Cain, which was attached by Norbert. If you are still interested in other works, then write to me, I will be happy to help.
Regards, Yulia.
I've just got the work of Cain for Preussia, and I have other papers for Sporormia and Sporormiella.
So I don't need others for the moment.
Thank you for your proposal, this is kind of you.
Michel R