Accès membres

Mot de passe perdu? S'inscrire

24-12-2025 17:08

Propolis sp. on Picea abies
Hulda Caroline Holte

Hello, I have found this propoloid ascomycete on

24-12-2025 18:12

Orbilia
Ethan Crenson

Hello all, A friend found this Orbilia growing on

23-12-2025 11:27

blanc poilu
Louis DENY

bonjour forum,sur débris de bois de feuillu (acer

20-12-2025 10:49

Small resin asco?
Mirek Gryc

Hi. „I doubt it is possible to identify this ti

23-12-2025 08:27

Hymenoscyphus?
Josep Torres Josep Torres

Hello.Small, yellowish ascomata, with very short a

21-12-2025 09:32

Spherical Pyrenomycete
Josep Torres Josep Torres

Hello.A tiny ascomycete found embedded in wood in

21-12-2025 21:32

Anamorf on decaying leaves of Euonymus japonicus 'Microphyllus'
Pol Debaenst

Hello, Garden, Burgweg 19, Veurne, BelgiumOn 10/1

22-12-2025 23:38

Phylloscypha labessiana ?
Patrice TANCHAUD

Bonsoir, récolte sur un mur en pierre, apothéci

21-12-2025 12:34

Nectria ??
Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

22-12-2025 00:47

Phylloscypha boltonii
Patrice TANCHAUD

Bonsoir, récolte à proximité du milieu dunaire

« < 1 2 3 4 5 > »
Orbilia with fusiform spores
Ethan Crenson, 31-05-2025 00:51
Hello,

Last week in New York City this Orbilia was found on a branch of hardwood resting on the ground. It is rose-orange colored with a smooth margin.


The spores are fusiform with one acute end (the end with the spore body) and one rounded end. They are not curved. The spore bodies are mostly long and vermiform, fairly broad.

Asci are truncate at certain angles.  In the photo I have highlighted, the spores are oriented inside the asci so that the top four spores have the spore bodies facing up, while the bottom four have the spore bodies facing down.

Paraphyses are septate, capitate, and encrusted. 2.5-4µm wide at the broad point of the apex.

Here are the measurements:

Spores:

4.5-6.6 x 1.5-2.3µm
Me: 6 x 1.9µm

Q: 2.4-4.3
Qe: 3.2
N=13

Spore body length:
1.6-4.8µm


Asci:


36-42 x 4.1-4.3µm

I am can find in Zottos magnificent monograph that Orbilia fusiformis may be a good match for spore morphology, but I think that would be a very remarkable expansion of distribution.

Thank you in advance!

Ethan
  • message #82805
  • message #82805
  • message #82805
  • message #82805
  • message #82805
  • message #82805
  • message #82805
  • message #82805
  • message #82805
  • message #82805
Hans-Otto Baral, 31-05-2025 09:50
Hans-Otto Baral
Re : Orbilia with fusiform spores
Hi Ethan

I think this is quite a good match! Your spores are broader, but this could be varation. We do not know if the few specimens cited under fusiformis are conspecific or not, I hesitated to merge them in one diagnosis.

Zotto
Ethan Crenson, 31-05-2025 14:28
Re : Orbilia with fusiform spores
Hi Zotto,

Thank you for your comments.  I will attempt to sequence this collection and perhaps this will lead to further clarity.  QUestion: is it possible that the last photo shows the anamorph, or is that contamination?

Thanks again,

Ethan
Hans-Otto Baral, 31-05-2025 14:54
Hans-Otto Baral
Re : Orbilia with fusiform spores
I thought of a contamination