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13-09-2025 14:10

Wim de Groot

We found this hymenoscyphus on rubus fruticulosis.

13-09-2025 15:43

Edmond POINTE Edmond POINTE

Bonjour Christian,J'ai trouvé deux spores ressemb

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

13-09-2025 14:01

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

10-09-2025 23:53

Marcel Heyligen Marcel Heyligen

Found on Robinia pseudoacasia together with Diapor

10-09-2025 17:18

Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

02-09-2025 11:34

Thomas Læssøe

https://svampe.databasen.org/observations/10527903

07-09-2025 08:19

Josep Torres Josep Torres

Hello.Tiny pinkish discomycetes, photographed and

09-09-2025 12:07

Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

08-09-2025 19:07

ruiz Jose

Hola me pasan esta recolecta en madera de fraxinus

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Nectria on Diatrypella quercina
Jenny Seawright, 12-04-2015 21:50
Jenny SeawrightHello all,

Back in the Nectria minefield but hoping that the host might narrow the possibilities a bit. The only possibility in Ellis seems to be Nectria magnusiana but .......!

On Diatrypella quercina - orange-red to red perithecia collapsing inward when old, the apices pointed and slightly darker. I couldn't manage a section of a perithecium but the spores were warted, hyaline, 0-1 septate, 12-15 x 5-6(7) µm.

Peridium: Aqua + KoH = purple, aqua + Cotton Blue in Lactophenol = yellow.

With regards,
Jenny


  • message #35167
  • message #35167
  • message #35167
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Björn Wergen, 13-04-2015 00:30
Björn Wergen
Re : Nectria on Diatrypella quercina
Hi Jenny,

I would call this collection Cosmospora sp., there may be several species growing on dead Diatrype / Diatrypella (e.g. Cosmospora diatrypicola), but its always not easy with this genus.

regards,
björn
Chris Yeates, 13-04-2015 00:52
Chris Yeates
Re : Nectria on Diatrypella quercina
I think Björn has put the situation well - I have had to rename a lot of my collections on Diatrypella as "Cosmospora sp." It would be fascinating to see how mycologists in a hundred years time view our struggles with these brightly coloured and attractive (but difficult) fungi. They will probably be able to sequence their finds in the field with ease . . . .

Chris
Björn Wergen, 13-04-2015 01:02
Björn Wergen
Re : Nectria on Diatrypella quercina
Yes, like action heroes with special black-rimmed glasses, showing all genetical details on a display...
Jenny Seawright, 13-04-2015 20:19
Jenny Seawright
Re : Nectria on Diatrypella quercina
Thank you Bjorn and Chris - must remember to walk past the next Nectria with eyes carefully averted!

"Yes, like action heroes with special black-rimmed glasses, showing all genetical details on a display..."
Can just imagine that!
Stoykov Dimitar, 22-04-2015 16:06
Stoykov Dimitar
Re : Nectria on Diatrypella quercina
Yes, it is difficult,
what is your opinion of Dialonectria (D. cf episphaeria),
in spite of its strange appearance. Regards
Christian Lechat, 22-04-2015 21:19
Christian Lechat
Re : Nectria on Diatrypella quercina
Hi Jenny,
Your fungus can't be the genus Cosmospora because its asexual state is fusarium-like, this genus is restricted to the species with acremonoium-like or verticillium-like.

Molecular data of the pecies occuring on Diatrypella quercina indicate that is the genus Dialonectria and it would be necessary to name it Dialonecria magnusiana or Fusarium!!

Regards,
Christian
Jenny Seawright, 22-04-2015 23:21
Jenny Seawright
Re : Nectria on Diatrypella quercina
Thank you Dimitar for re-activating my query, and even bigger thanks to Christian for confirming my initial tentative identification and providing the most recent name.

With regards,
Jenny