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25-01-2026 16:08

Geoglossum
Malcolm Greaves Malcolm Greaves

This Geoglossum had spores mostly 70-80 (87) with

27-01-2026 11:43

DNA match
Malcolm Greaves Malcolm Greaves

Is anyone with experience of DNA testing able to t

26-01-2026 11:49

Anamorph on Cytisus
Margot en Geert Vullings

We found this possible anamorph on a dead Cytisus

25-01-2026 23:23

Delitschia/Lojkania? on wood
Tomaz Vucko Tomaz Vucko

Hello! I found this species that resembles Delitsc

18-01-2026 12:24

Anamorph on an olive tree
Josep Torres Josep Torres

Hello.An anamorph located on the surface of a thin

23-01-2026 21:50

Looking for a paper please
Cameron DK

I am looking for this please publication. is anyon

10-01-2026 20:00

Lichenicolous fungus on Protoparmeliopsis muralis
Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

21-01-2026 19:55

Nemania aureolutea?
Bohan Jia

Hi,  Could this be Nemania aureolutea? Or did I

21-01-2026 16:32

Lichenicolous coelomycete
Gernot Friebes

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

21-01-2026 16:48

Hyphomycete on Rubus fruticosus agg.
Gernot Friebes

Hi,after my last unknown hyphomycete on this subst

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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!