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18-11-2012 19:29

On Quercus wood
Enrique Rubio Enrique Rubio

Dear friends:have you some idea for this gregariou

19-11-2012 23:43

Very small yellow ascomycota
Edit Szilvásy Edit Szilvásy

Hi all!I bring these specimens asking for your hel

20-11-2012 01:06

A Hypocrea sp. from Panama.
Esquivel-Rios Eduardo

Hy All.I found this yellow-orange Hypocrea in a d

19-11-2012 23:30

Light brown ascomycota with long handle
Edit Szilvásy Edit Szilvásy

Hi all! I bring these specimens asking for your h

02-11-2012 21:23

An Encoelia like fungus on Quercus leaf
Michel Hairaud Michel Hairaud

BonsoirHi to all, Cette espèce récoltée sur feu

19-11-2012 17:09

Pleosporale s/ Gentiana lutea
Luc Bailly Luc Bailly

Bonjour à tous,Lac des Rouges Truites, Jura, 2.10

19-11-2012 16:55

Bituniqué à spores filiformes s/ Gentiana lutea
Luc Bailly Luc Bailly

Tourbière du Lac des Rouges Truites, Jura, 2.11.1

19-11-2012 16:30

Mollisia s/ Gentiana lutea
Luc Bailly Luc Bailly

Bonjour à tous,Voici quelques espèces récoltée

17-11-2012 20:41

Literature request on Anthostoma
Enrique Rubio Enrique Rubio

Hi to allHave you a modern description of Anthosto

19-11-2012 09:51

Demande publication
Guy Garcia

Bonjour à tous,Je recherche l'article suivantSACC

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Thyronectria on unknown hardwood branch
Ethan Crenson, 05-02-2025 04:38
Hi all,

Found by a friend last Saturday in Staten Island NYC, in mixed hardwoods with Quercus, Liquidambar, Prunus, Betula.  I believe this is Thyronectria, but I'm not sure what species. (I was almost sure it was going to be Pseudotrichia mutabilis until I saw the spores).

Emerging from underneath the bark. This is either growing on another effete pyrenomycete, or it makes a black stroma—not sure which.  There is a yellow-green scurf on the individual perithecia with a simple black ostiole at the apex.

Spores:


17.5-26.2 x 6.3-8.9µm
Me 21.7 x 7.9µm
Q 2.1-3.2
Qe 2.8
N=24


Hyaline, occasionally allantoid, rounded ends. They do not appear to bud.
(3)7(8) septate, with multiple longitudinal septa.


I have tried to key it out using Jaklitsch, W. M., & Voglmayr, H. (2014). "Persistent hamathecial threads in the Nectriaceae, Hypocreales: Thyronectria revisited and re-instated" but without much luck.


Any help would be appreciated.


Thank you in advance.


Ethan


 

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Viktorie Halasu, 05-02-2025 22:25
Viktorie Halasu
Re : Thyronectria on unknown hardwood branch
Hello,

it's from the group around T. zanthoxyli, but which one...
- Not T. rhodochlora, too narrow spores.
- T. zanthoxyli should have perithecia clearly immersed in stroma and much more curved spores (my Czech coll. attached), although there are also exceptions and the coll. published in https://doi.org/10.1007/s11557-021-01763-z looks much like yours in this aspect.
- T. lonicerae and T. virens I haven't seen myself. T. lonicerae differs macroscopically, as far as one could rely on this feature, also the spores have more narrow poles like T. berolinensis.


So I would say either T. zanthoxyli with atypically straight spores, or T. virens with atypically long spores.


Viktorie

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Ethan Crenson, 05-02-2025 22:41
Re : Thyronectria on unknown hardwood branch
Thank you Viktorie!  I will take another look at the spores   My impression of the spores (from memory) is that many were curved, though not all. I am also planning to sequence my collection.

Thanks again!