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24-02-2026 00:21

Pezizale
Benoît Segerer

Hello,I'm new to this forum, I hope I won't be irr

24-02-2026 11:01

Anamorph on Tilia
Gernot Friebes

Hi,found on a branch of Tilia, with conidia measur

23-02-2026 11:22

lasiosphaerioid on pine cone with small, slender spores - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10584971

29-11-2024 21:47

Calycina heterospora
Yanick BOULANGER

BonjourJ'avais un deuxième échantillon moins mat

07-02-2023 22:28

Fracchiaea callista? on Carpinus
Ethan Crenson

Hello friends, On Sunday, in the southern part of

19-02-2026 17:49

Ayuda con Tarzetta sp
Salvador Emilio Jose

Hola buenas tardes!! Necesito ayuda para la ident

09-02-2026 22:01

Sp
ruiz Jose

Hola, me paso esta colección en madera de pino, t

19-02-2026 13:50

Hairy disc-"Patinella sanguineoatra" like
Margot en Geert Vullings

We found this collection on deciduous wood on 7-2-

19-02-2026 12:01

Ayuda con esta
Castillo Joseba Castillo Joseba

Me mandan el material de Galicia (España), recole

17-02-2026 09:41

Diaporthe spiculosa?
Maren Kamke Maren Kamke

Good morning, I found a Diaporthe species on Samb

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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