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11-05-2026 12:32

Hélotiale à paraphyses à exsudat brun jaunâtre
Bernard CLESSE Bernard CLESSE

Pourriez-vous m'aider à identifier cette héloti

11-05-2026 20:22

Orbilia from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

on attached twig of standing Ficus caricaquite uns

28-04-2026 20:07

Marthamycetales? - from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

... on twig in the air at standing Ceratonia siliq

11-05-2026 13:22

Pirottaea sp
Sylvie Le Goff

BonjourPuis avoir votre avis sur cet ascome, je vo

29-04-2026 10:44

Boudiera from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

growing at moist, drying-out soil at the side of a

11-05-2026 13:47

Litterature request
Åge Oterhals

Does anyone have av copy of Hawksworth & Siva

05-04-2026 22:46

blue mould from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

on wood of Ceratonia, Algarve, 3.4.2026.The color

10-05-2026 16:18

Elaiopeziza polaripapulata ?
brigitte vignot

bonjour trouvée  en Ariège sur bois une petite

10-05-2026 23:17

Scleromitrula (?) from decaying leaves of Fagus/Acer
Andreas Gminder Andreas Gminder

Hello,today we found in a moist steep decidous for

27-04-2026 17:16

anamorph on monocotyleous leaves from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, moist lying.The conidiomata look like

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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!