11-02-2026 22:15
William Slosse
Today, February 11, 2026, we found the following R
11-02-2026 19:28
Lothar Krieglsteiner
on small deciduous twig on the ground in forest wi
25-04-2025 17:24
Stefan BlaserHi everybody, This collection was collected by JÃ
10-02-2026 17:42
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous me donner
10-02-2026 18:54
Erik Van DijkDoes anyone has an idea what fungus species this m
09-02-2026 20:10
Lothar Krieglsteiner
The first 6 tables show surely one species with 2
09-02-2026 14:46
Anna KlosGoedemiddag, Op donderdag 5 februari vonden we ti
02-02-2026 21:46
Margot en Geert VullingsOn a barkless poplar branch, we found hairy discs
Nectria on Diatrypella quercina
Jenny Seawright,
12-04-2015 21:50
Hello 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
Björn Wergen,
13-04-2015 00:30
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
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
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
Chris
Björn Wergen,
13-04-2015 01:02
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
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!
"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
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
what is your opinion of Dialonectria (D. cf episphaeria),
in spite of its strange appearance. Regards
Christian Lechat,
22-04-2015 21:19
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
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
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
With regards,
Jenny