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Mot de passe perdu?

06-05-2025 13:37

Looking for digital literature of Munk Anders

Thomas Flammer

Munk, Anders (1953). The System of the Pyrenomycet

08-05-2025 20:50

Greyish aquatic asco

Andreas Jacob

Good evening, due to contstant drought I started

07-05-2025 18:29

Olla or Urceolella?

Francois Guay

Francois Guay

I found this small hyaline ascomycete on moist, de

08-05-2025 02:22

White Lasiobelonium?

Francois Guay

Francois Guay

I found this white, hairy ascomycete on the bark o

08-05-2025 18:32

On Yucca filamentosa - conidia like Robillarda, but aseptate

Ethan Crenson

Hello all, I was looking at leaves of Yucca from

08-05-2025 08:59

Xylaria para ID 0402

Castillo Joseba

Castillo Joseba

Me mandan el material de Galicia, (España) , reco

07-05-2025 10:18

Fusarium sambucinum

Thomas Flammer

I have found on Genistae sth. that looks like puli

05-05-2025 09:35

Inoperculé noir sur herbacée

Nicolas Suberbielle

Nicolas Suberbielle

Bonjour à tous,Marie-Rose d'Angelo de la Sociét�

06-05-2025 12:52

En madera de Eucalipto 0237

Castillo Joseba

Castillo Joseba

Me mandan el material de Galicia (España), reco

06-05-2025 13:22

En Helecho, 0256

Castillo Joseba

Castillo Joseba

Me mandan el material de Galicia (España), reco

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Orbilia sarraziniana or Orbilia luteorubella ?

Ethan Crenson, 30-05-2024 07:23

Did I pay close attention to the lecture Zotto gave two weekends ago? Here's my chance to find out.

This Orbilia is from a decorticated branch of hardwood, probably found on the ground (it was not my collection, it was handed to me) from a New York City park last weekend.

I initially thought it might be Orbilia luteorubella, but after staring for a while at the orientation of the spores in the asci I have changed my opinion. Now I tend to think that it is Orbilia sarraziniana.

Spores:
fusiform-clavate, with one acute end and one rounded end. The spore body a long, sometimes winding form ending at the pointed end of the spore:
4.9-7.5 x 1.3-1.6µm.

The spore body 2-4µm in length

Asci:
22.9-27.7 x 3.4-3.9µm (I know this probably seems short.)
truncate apex, furcate base. It looks to me that the upper spores have spore bodies at the bottom, lower spores with spore bodies up.

Paraphyses
capitate, with material covering the apex
19.8 x 3.1µm

I don't have images of the conidia, unfortunately. In fact, the bulb blew on my microscope and I am waiting for a replacement, so I can't check for them until the replacement bulb comes in the mail.

Is it possible to tell from this evidence?

Many thanks in advance,

Ethan

Hans-Otto Baral, 30-05-2024 09:36

Hans-Otto Baral

Re : Orbilia sarraziniana or Orbilia luteorubella ?

Hi Ethan

indeed I would classify this as O. sarraziniana. Besides spore orientation O. luteorubella and O. rosea have longer spores, though this much overlaps.

Although the upper spores are oriented inversely I would anyway speak of the acute spore end with the SB as the upper end and orient them also on plates with SB upwards.

We had some collections of this group in which there was much variation with both directions occurring near the ascus apex and at the lower end of the pars sporifera.

So the place of the SB is the indication, and you can imagine when dealing with dead spores you may easily think the acute end is the lower end.

Zotto

Ethan Crenson, 30-05-2024 14:41

Re : Orbilia sarraziniana or Orbilia luteorubella ?

Hi Zotto,

Thank you as always for your help!

Ethan