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01-02-2026 19:29

Lambertella sur Olea
Nicolas Suberbielle Nicolas Suberbielle

Bonjour, Marie-Rose D'Angelo (Société Mycologiq

30-01-2026 22:49

Calycina ?
éric ROMERO éric ROMERO

Bonjour tous, Récolté dans les Vosges le 22/10/

31-01-2026 09:17

Small hairy discs on Castanea
Marc Detollenaere Marc Detollenaere

Dear Forum,On decorticated wood of Castanea,I foun

29-08-2025 05:16

Teleomorph of Dendrostilbella smaragdina ?
Francois Guay Francois Guay

I think I may have found the teleomorph of Dendros

31-01-2026 10:22

Lichenicole hypocreale
Michel Hairaud Michel Hairaud

Bonjour, Cette hypocreale parasite en nombre les

30-01-2026 21:20

Bryocentria brongniartii und B. metzgeriae mit ihrer Anamorphe.
Arnold Büschlen

Bryocentria brongniartii und B. metzgeriae mit ihr

21-01-2026 16:32

Lichenicolous coelomycete
Gernot Friebes

Hi,I need your help with some black dots on a lich

07-12-2015 14:17

Una Peziza a latice giallo-verdastro con croziers
Zugna Marino Zugna Marino

Buon giorno a tutti, ad un primo momento, non ess

29-01-2026 10:04

Séminaire Ascos en Belgique
Jean-Paul Priou Jean-Paul Priou

Bonjour à tous, Marcel LECOMTE président de L'A

17-11-2009 22:22

Peziza avec latex
Pablo Chacón Pablo Chacón

Bonne nuit, Voir si vous m'avez élaguée appor

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Diaporthe or related? On dogwood twig.
Edvin Johannesen, 04-06-2020 19:30
Edvin Johannesen
I did not draw the black lines here - the fungus did!

The perithecia are quite deeply embedded, sometimes more than one, but few, in a group.  Spores very large, but variable in length; 35-65 x 8-10 microns, 1-septate, slightly constricted at the septum, filled with variably sized droplet, bearing ca. 4 microns long hyaline appendages at the poles.  Asci irregularly biseriate. Ascus apparatus ring-shaped. Spores measured an photographed in water. Phase contrast used in order to see the spore appendages.

Are we in Diaporthaceae (Diaporthe) or Gnomoniaceae (Pseudodiaporthe) or somewhere else?

Thanks in advance.
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Edvin Johannesen, 04-06-2020 19:31
Edvin Johannesen
Re : Diaporthe or related? On dogwood twig.
Some microscopic details.
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Edvin Johannesen, 04-06-2020 19:33
Edvin Johannesen
Re : Diaporthe or related? On dogwood twig.
The dogwood species is Swida sericea (=Cornus stolonifera).
Eduard Osieck, 08-06-2020 22:25
Re : Diaporthe or related? On dogwood twig.
Hi Edvin
Compare with Diaporthe tessella which species has such large, appendaged spores and stromatic line. Nice drawing of spores and stroma in Wehmeyer 1933 (Diaporthe world monograph). A link to this book is given on www.verspreidingsatlas.nl/0740020 (see tab Artikelen).
Eduard
Edvin Johannesen, 08-06-2020 22:28
Edvin Johannesen
Re : Diaporthe or related? On dogwood twig.
Thanks a lot, Eduard - I will check :)