Accès membres

Mot de passe perdu? S'inscrire

12-11-2025 09:25

Viktorie Halasu Viktorie Halasu

Hello, I need help with a pale terrestric Pseudom

11-11-2025 20:16

Bohan Jia

Hi, lastly I have found these tiny yellow decayin

09-11-2025 13:20

Josep Torres Josep Torres

Hello.A tiny ascomycete, appearing as erupting gra

08-11-2025 12:10

Elisabeth Stöckli

Bonjour, Trouvé sur tiges mortes de Rubus (ronce

08-11-2025 00:29

Francois Guay Francois Guay

I found this species in Quebec, Canada, on herbace

04-11-2025 14:53

Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

08-11-2025 09:15

Michel Hairaud Michel Hairaud

Bonjour, Pouvez vous m'aider à identifier ce Mol

06-11-2025 16:50

Rot Bojan

Hello! Yesterday I found a fungus on or near a nee

05-11-2025 11:33

Pierre Repellin

Bonjpur,J'ai trouvé, sur une hampe florale d'Alli

04-11-2025 09:07

Josep Torres Josep Torres

Hello.A suspected Hymenoscyphus sprouting on a thi

« < 1 2 3 4 5 > »
Ophiostoma or Ceratocystis
Eduard Osieck, 19-04-2015 13:27
This long-necked pyrenomycete (only top of neck shown) is growing on Hypoxylon petriniae (the latter on Fraxinus). The long necks (up to 10 mm) have often a drop at the end. Ostiolar hyphae divergent and pointed.

Belongs this to the genus Ophiostoma or Ceratocystis?
Does anybody know about its occurrence on Hypoxylon?
Is there a modern key to these genera?

Thanking you in advance,
Eduard
  • message #35301
Wilhelm De Beer, 19-04-2015 23:33
Wilhelm De Beer
Re : Ophiostoma or Ceratocystis
Dear Eduard

This is indeed very interesting! I am specializing in the ophiostomatoid fungi and during the last few years we have found a small number of isolates of Ophiostoma (not Ceratocystis) from fruiting bodies of basisidiomycetes. This does not fit the general notion that most Ophiostoma are associates of bark beetles and/or wood-inhabiting. I have thus only 6 weeks ago put a new student onto a project to invetsigate the biology of these isolates from basidiomycetes. And although Hypoxylon is an ascomycete, the fungus you found crealy fit within this group. It seems as if you are based in the Netherlands? It just so happens that I am in Utrecht this week (leaving 26 Apr) for meetings at the CBS. Is there any way in which you can make this material available to me? I would like to try and make a culture from this fungus, but it is also essential that an herbarium specimen be preserved.
I would appreciate if we can communicate further by email, it will be easier for me than via this website.

wilhelm.debeer@fabi.up.ac.za

Sincerely
Wilhelm de Beer
Eduard Osieck, 01-09-2021 11:59
Re : Ophiostoma or Ceratocystis
To complete this topic: Finally this collection has got a name: Sporothrix hypoxyli, see Crous et al. 2021, New and interesting fungi, Fungal Systematics and Evolution (FUSE) 7: 328-330).

Eduard