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12-04-2026 17:56

Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Hardware Tony Hardware Tony

Found on dead stems in February earlier this year

12-04-2026 15:52

Anamorph on Salix
Gernot Friebes

Hi,I'm looking for help with this anamorph collect

12-04-2026 12:22

Unknown anamorph on Primula eliator
William Slosse William Slosse

In a dune grassland in Oostduinkerke (Belgium), on

11-04-2026 15:45

Article search - Octospora ithacaensis
Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Please, could anyone send me this paper?Moyne G.,

11-04-2026 13:34

Requesting help with Dasyscyphella sp. ID
Artem Ptukha

Hello, I am seeking assistance with the identific

11-04-2026 10:42

Una para ID
Castillo Joseba Castillo Joseba

Me mandan el material de Galicia, España, recolec

11-04-2026 10:19

Bientôt, un nouveau livre important
Michel Hairaud Michel Hairaud

Chers amis d'Ascofrance , voici une très bonne no

11-04-2026 10:10

An important new book
Michel Hairaud Michel Hairaud

Dear Ascofrance members, here is some very good ne

10-04-2026 23:22

Pyreno on Phragmites australis
Gernot Friebes

Hi,ascospores are 1- to 3-septate, approximately 

10-04-2026 15:51

Botrytis ficariarum & Peronospora ficariae?
William Slosse William Slosse

Hello everyone, On 08/04/26, I found a growth sit

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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!