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Mot de passe perdu? S'inscrire

30-07-2025 20:52

apo on Pteridium aquilinum
Bohan Jia

Hi together,  I've been looking posts in AscoFra

30-07-2025 18:06

Orbilia dryadum?
Stefan Jakobsson

On a decorticated twig of Alnus incana on moist so

30-07-2025 10:12

Asco1 sur crotte de mouton
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

29-07-2025 18:59

Ayuda con esta
Castillo Joseba Castillo Joseba

Me mandan el  material seco de Galicia, España,

28-07-2025 12:34

Capronia
Enrique Rubio Enrique Rubio

Hi to everybody.I would appreciate any ideas about

28-07-2025 04:59

identification?
Richard Droker

Growing on resin (over moss on Tsuga heterophyll)l

13-06-2025 09:41

Aquatic ascomycete.
Josep Torres Josep Torres

Hello.A cerebriform ascomycete sprouting scattered

13-06-2025 16:34

Strossmayeria-like on Fagus
Andgelo Mombert Andgelo Mombert

Bonjour,Un petit discomycète qui me résiste. Il

24-07-2025 19:02

Discomiceto 2510
Castillo Joseba Castillo Joseba

De esta mañana en tronco caido de Haya A ver si

21-07-2025 19:22

Orbilia nemaspora ...or aurantiorubra?
Ethan Crenson

Hello all,  Here is an Orbilia found by a friend

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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
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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