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27-06-2014 00:52

Nick Aplin

Salut à tous, I collected some perithecia on Car

28-06-2014 05:38

Nina Filippova

This species is constantly met on different substr

19-06-2014 08:08

Nina Filippova

This smallish Helotium sp. was found on Ledum palu

25-06-2014 13:13

Nina Filippova

Good time to everyone. I have posted this species

27-06-2014 14:30

Nina Filippova

Hello, dear colleagues. It is my first collection

27-06-2014 01:42

Alan Rockefeller Alan Rockefeller

I found this yesterday on a hardwood twig in Verac

27-06-2014 07:26

Alan Rockefeller Alan Rockefeller

Yesterday I found this on a hardwood log in a clou

30-04-2014 16:23

Leandro Sánchez Leandro Sánchez

Sobre hoja de Quercus, hasta 0,6 mm de diámetro.A

26-06-2014 09:06

Blasco Rafael Blasco Rafael

. De Hola, Alguien Ayudar Florerias, y Decir si es

24-06-2014 19:06

Enrique Rubio Enrique Rubio

Hi again Can someone help me with this article on

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Gnomoniaceae on Carpinus petioles
Nick Aplin, 27-06-2014 00:52

Salut à tous,


I collected some perithecia on Carpinus betulus petioles on 19th June in Southern England that I would like some help with...


Perithecia 100-150 µm diam, with long necks up to 270 µm, each surrounded by a white collar


Ascospores 19.7-25 x 2.6-3.2 µm, with one median septum. I think I can see appendages in water on immature spores, but they disappear too quickly to photograph!


Asci IKI-, Congo red +


I found Alain's key to species on Carpinus leaves here on Ascofrance, with which it keys out relatively easily to C.amoena, though my spores are a little long.


I cross-referenced with Leaf-inhabiting genera of the Gnomoniaceae, Diaporthales Sogonov, Rossman et al, and all seems OK, again apart from the spore length (there is no detailed description there).


Can anyone confirm my thoughts that this is C.amoena, or perhaps offer a suitable alternative?


Does anyone have access to Sodov's description in Monographie taxonomique des Gnomoniaceae. Beihefte sur Sydowia 9: 1–315. (1983)?


Amitiés,


Nick


 


 

  • message #30027
  • message #30027
Alain GARDIENNET, 27-06-2014 07:52
Alain GARDIENNET
Re : Gnomoniaceae on Carpinus petioles

Hi Nick,


Happy to see my key useful.


Yes it's exactly G. amoena. Length up to 25 µm is not impossible, to my mind.


The most important in all features is that you show white collar around the neck. You also should  observe necks > 300 µm long.


If you see appendices on young ascospores, appendices are present. It's ok.


I've never seen this fungus unfortunately.


Alain

Björn Wergen, 27-06-2014 16:14
Björn Wergen
Re : Gnomoniaceae on Carpinus petioles
Hi Nick,

you can send me the collection or, if you wish, you can send me the photos, which are really good for FP :)

Nice finding.

regards,
björn
Nick Aplin, 28-06-2014 01:04
Re : Gnomoniaceae on Carpinus petioles

Hi Alain,


Thanks for the confirmation - This species doesn't seem to have been recorded previously in the UK, so a good result.


There could well be longer necks, most were curved and quite difficult to measure!


Björn - The specimen I have left is looking a bit sad, so I'll email the photos for FP. When I collect some more I'll send them over.


Best wishes,


Nick