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21-10-2025 04:52

Francois Guay Francois Guay

I found what might be Chlorociboria aeruginella on

17-10-2025 18:45

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, Oct. 2025.

25-11-2016 13:54

Stephen Martin Mifsud Stephen Martin Mifsud

Hi, I found numerous seeds of Washingtonia robusta

19-10-2025 18:58

Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Il y a un peu plus de de

20-10-2025 09:36

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for the following article:Bene

19-10-2025 14:10

Camille Mertens

Bonjour à tous.Asco stipité 1mm de texture appar

23-09-2025 13:31

Thomas Læssøe

https://svampe.databasen.org/observations/10534623

15-10-2025 16:39

Edvin Johannesen Edvin Johannesen

These tiny (0.2-0.6 mm), white, pulvinate apotheci

03-10-2025 13:44

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde on Populus

13-10-2025 19:05

Louis DENY

Bonjour forumSur tronc décortiqué de feuillu x,

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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