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19-11-2025 23:21

small white discs on Campylopus introflexus

carl van den broeck

carl van den broeck

Dear guestIn Waardamme, Belgium, I found dozens of

19-11-2025 20:51

Pyreno on Fagus

Andreas Millinger

Andreas Millinger

Good evening,found this species on a felled trunk

19-11-2025 13:04

Karstenia ? spores acuminées

Bruno CouÃ©

Bruno Coué

Bonjour,je sollicite votre avis pour la récote

17-11-2025 21:46

Lachnum impudicum

Philippe PELLICIER

Bonjour,Récolté sur bois pourrissant de feuillu

18-11-2025 18:26

Literature search

David Malloch

David Malloch

I am trying to locate the article, Müller, E. 195

16-11-2025 21:09

Hyphomycete on twig of abies

Robin Isaksson

Robin Isaksson

Anyone recognize this acc. to pictures.? Found on

18-11-2025 13:59

ID Help Hymenoscyphus

Nogueira Héctor

November 14, 2025 Brazuelo (León) SPAIN Hymenosc

17-11-2025 19:14

Cheilymenia crucipila

herman lambert

Apothécie discoïde 0.6 cm diam., orangeFace hym�

17-11-2025 21:57

Hyaloscypha fuckelii var. alniseta

Philippe PELLICIER

Bonjour,Récolté sur bois de feuillu mort dur, no

14-11-2025 16:26

Small species on Cytisus scoparius

Marian Jagers

Marian Jagers

Hello everyone, On dead wood of Cytisus scoparius

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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