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Castillo Joseba Castillo Joseba

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... on twig in the air at standing Ceratonia siliq

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Gernot Friebes

Hi,I believe this is a Plagiostoma growing on a Sa

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Stephen Martin Mifsud Stephen Martin Mifsud

ID request for what seems to be a true aquatic fun

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Stephen Martin Mifsud Stephen Martin Mifsud

ID request: This specimen was collected in Malta o

28-07-2011 18:31

Alex Akulov Alex Akulov

Dear FriendsToday I made the pdf file of Velenovsk

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Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia,(España) re

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Pauline. Penna

Bonjour  Please can someone help me with this id

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Hypoxylon macrocarpum on Corylus?
Marc Detollenaere, 24-10-2018 19:57
Marc Detollenaere

On Carpinus we found some multi-peritheciate stromata with a blue metallic shine.Stromata were mostly immersed.With KOH 5% a greyish pigment was extracted and we could also observe a slightly dehiscent perispore.Spores measured 10-11x4µ.


We thought it matched quite well with the description of Hypoxylon macrocarpum from Pouzar(1978).


Could you agree?

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Yannick Mourgues, 24-10-2018 21:55
Yannick Mourgues
Re : Hypoxylon macrocarpum on Corylus?
Hi.

Yes, I think you're right. See Jacques Fourier's description : http://pyrenomycetes.free.fr/hypoxylon/html/Hypoxylon_macrocarpum.htm

Yannick
Eduard Osieck, 25-10-2018 22:27
Re : Hypoxylon macrocarpum on Corylus?
Hi Marc,
The perithecia should be more or less cylindrical (see next issue of Coolia).
Eduard
Marc Detollenaere, 26-10-2018 00:01
Marc Detollenaere
Re : Hypoxylon macrocarpum on Corylus?

Hello Eduard,


If it not macrocarpum, what would you suggest?

Marc Detollenaere, 26-10-2018 20:31
Marc Detollenaere
Re : Hypoxylon macrocarpum on Corylus?
Merci Yannick
Thomas Læssøe, 29-10-2018 11:58
Re : Hypoxylon macrocarpum on Corylus?
I would suggest a species of Nemania. Perithecial contours are visible on the stromatal surface and the ostioles would appear to be papillate and the ascus plug is too long to fit Hypoxylon
cheers
Thomas
Marc Detollenaere, 30-10-2018 07:03
Marc Detollenaere
Re : Hypoxylon macrocarpum on Corylus?
Hello Thomas,

I think you are right. I have been misleaded by the apical apparatus.
That also explains the minimal reaction on KOH.
I discussed the matter with Bernard Declercq who thinks is Nemania serpens var. colliculosa.

Marc