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01-06-2025 09:37

Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

06-07-2025 19:36

Castillo Joseba Castillo Joseba

me mandan el material de Galicia (España) recolec

05-07-2025 12:38

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

04-07-2025 20:12

Josep Torres Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

03-07-2025 18:40

Castillo Joseba Castillo Joseba

me mandas el material seco de Galicia (España) re

03-07-2025 20:08

Francois Guay Francois Guay

I found this interesting yellowish asco growing on

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

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Thyronectria chrysogramma?
M Jonathan, 28-12-2015 05:24
M Jonathan
Collected 24 december 2015, on Ulmus americanus bark in Ottawa ontario.

the Perithecia show stricking yellowish coloration.


The asci seem to be bitunicate, do not react in melzer and bear 8 spores, the spore measure 28-31u*10-12. The spores contain several (up to 9-10) horizontal septum and 1-2(3?) vertical septum.


Seem to be promising for T chrysogramma, however I can't find pictures to compare.

I have the specimens in case anyone is interested in them

Regards

Jonathan M

https://c2.staticflickr.com/6/5778/23721004260_c0e180c662_b.jpg

Gernot Friebes, 28-12-2015 09:07
Re : Thyronectria chrysogramma?
Hi Jonathan,

here is a paper by Jaklitsch & Voglmayr which includes photos of T. chrysogramma as well as further literature on that species and a key to the genus: tps://www.researchgate.net/publication/270283146_Persistent_hamathecial_threads_in_the_Nectriaceae_Hypocreales_Thyronectria_revisited_and_re-instated

Best wishes,
Gernot
M Jonathan, 28-12-2015 18:55
M Jonathan
Re : Thyronectria chrysogramma?
Thank you, I lookedat that paper and somehow missed those pictures, The ressemblance are striking, I think it is the good identification, even if my specimens are not in groups like those species tend to be.