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06-11-2025 16:50

Rot Bojan

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

04-11-2025 14:53

Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

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

04-11-2025 12:43

Edvin Johannesen Edvin Johannesen

Hi! One more found on old Populus tremula log in O

03-11-2025 21:34

Edvin Johannesen Edvin Johannesen

These tiny (0.4-0.5 mm diam.), whitish, short-stip

03-11-2025 19:41

David Chapados David Chapados

Hi,Does anyone knows which genus could this be? G

28-10-2025 15:37

Carl Farmer

I'd be grateful for any suggestions for this strik

03-11-2025 16:30

Hans-Otto Baral Hans-Otto Baral

Hello I want to ask you if you have found this ye

01-11-2025 09:14

Francis Maggi

Bonjour,Trouvé sur Xanthoria parietina à Valdebl

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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