21-01-2026 16:32
Gernot FriebesHi,I need your help with some black dots on a lich
21-01-2026 16:48
Gernot FriebesHi,after my last unknown hyphomycete on this subst
20-01-2026 17:49
Hardware Tony
I offer this collection as a possibility only as e
15-01-2026 15:55
Lothar Krieglsteiner
this one is especially interesting for me because
17-01-2026 19:35
Arnold BüschlenHallo, ich suche zu Cosmospora aurantiicola Lite
16-01-2026 00:45
Ethan CrensonHi all, On decorticated hardwood from a New York
18-01-2026 12:24
Josep Torres
Hello.An anamorph located on the surface of a thin
Hysterium-like on Fraxinus
Marc Detollenaere,
08-03-2023 23:06
Dear Forum,On Fraxinus I found some elongated black ascomata with hyaline spores, 1 to 3-septate, with warts. They measured 17-18.5x5-5.5µ. The asci were biseriate and measured about 50x8.5µ.
Any suggestions?
Thanks in advance
Marc
Gonzalez Garcia Marta,
09-03-2023 16:10
Re : Hysterium-like on Fraxinus
Hello Marc
Pienso que es un hongo liquenizado. En esta página:
https://italic.units.it/?procedure=idkeys
tiene buenas claves. Le recomiendo la clave 42. Yo creo que su liquen es cercano a Arthonia atra.
Pienso que es un hongo liquenizado. En esta página:
https://italic.units.it/?procedure=idkeys
tiene buenas claves. Le recomiendo la clave 42. Yo creo que su liquen es cercano a Arthonia atra.
Alain GARDIENNET,
09-03-2023 20:51
Re : Hysterium-like on Fraxinus
I've immediatly thought at a lichenized fungus . But we should be able to see the elements a little better.
Alain
Alain
Marc Detollenaere,
10-03-2023 08:11
Re : Hysterium-like on Fraxinus
Thank you for the quick response.
Around the ascomata I only see unbarked wood.Why do you propose an lichenized fungus?
Marc
Around the ascomata I only see unbarked wood.Why do you propose an lichenized fungus?
Marc
Gonzalez Garcia Marta,
10-03-2023 09:26
Re : Hysterium-like on Fraxinus
Hi Marc, lichens are associations between fungi and algae. In his photograph it can be seen that the lirelas settle on a green thallus that in turn grows on wood. There are many lichens whose reproductive structures are hysterothecia: Graphis, Arthonia, Alyxoria, Zwackhia, etc...
In a photo taken from further away, the thallus can be clearly seen.
In a photo taken from further away, the thallus can be clearly seen.
Marc Detollenaere,
10-03-2023 09:50
Re : Hysterium-like on Fraxinus
Thx
Jason Karakehian,
10-03-2023 14:56
Re : Hysterium-like on Fraxinus
That may not actually be a thallus but just bleached wood, the algae that are there may be a casual association. You see this with Mellitiosporium propolidoides and Xerotrema. There is some debate as to whether these fungi are "facultative lichens" that is, they may have some interactions with algae but aren't forming a distinctive thallus. Regardless, the fungus may be treated in the lichen literature, and it may be Ostropales or something in Dothideomycetes.