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21-03-2026 15:13

MYXOMYCETICOLOUS FUNGI
Lepista Zacarias

Hello everyone, Does any one know of any literatu

21-03-2026 22:59

Hysteriaceae ??
Petr Soucek

Good evening, I would appreciate some advice on th

20-03-2026 12:53

Eutypa spec. (?)
Stefan Blaser

Hello everybody, In the field, from distance, my

20-10-2017 09:23

Hymenoscyphus ¿calycinoides?
Garcia Susana

Este otro crecía en el mismo trocito de madera qu

20-03-2026 16:16

Pseudomassaria-like on Cornus alba
Edvin Johannesen Edvin Johannesen

These 0.5 mm diam. acervuli were breaking through

19-03-2026 19:34

Xylariaceae? on Carpinus betulus wood
Filip Fuljer Filip Fuljer

Hello everyone,a few days ago I collected this str

19-03-2026 18:25

Myriosclerotinia curreyana?
William Slosse William Slosse

Good evening everyone, On 18/03/26 I found a few

17-03-2026 10:09

Lasiobelonium corticale ?
François Freléchoux François Freléchoux

Bonjour, Voici la description rapide d'un petit d

19-03-2026 15:58

"Lasiosphaerioid"
Stefan Blaser

Hello everybody, I hope for some hints... Macro:

19-03-2026 17:50

Massarina on Corylus
Enrique Rubio Enrique Rubio

Hi to everybodyThese thiny, blackish pseudothecia

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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 :)