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17-09-2025 10:50

Heather Merrylees

Hi there!I am hoping for any advice on the identif

27-11-2025 15:41

Thomas Læssøe

Spores brownish, typically 4-celled; 26.8 x 2.4;

27-11-2025 12:01

Thomas Læssøe

https://svampe.databasen.org/observations/10496727

27-11-2025 11:46

Thomas Læssøe

https://svampe.databasen.org/observations/10493918

27-11-2025 11:31

Thomas Læssøe

Collectors notes: Immersed ascomata, erumpent thro

23-09-2025 13:31

Thomas Læssøe

https://svampe.databasen.org/observations/10534623

25-11-2025 14:24

Thomas Læssøe

https://svampe.databasen.org/observations/10490522

26-11-2025 18:13

Jason Karakehian Jason Karakehian

The entire run of Mycotaxon is now available throu

21-11-2025 15:22

Vasileios Kaounas Vasileios Kaounas

Found in moss, forest with Pinus halepensis. Dime

24-11-2025 18:17

ruiz Jose

Hola en madera, quizás de alnus. Esporas(12.1) 12

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Orbilia pilifera?
Edvin Johannesen, 20-05-2021 17:27
Edvin Johannesen
Hi!

This beautiful pink Orbilia was growing on a thin Ulmus twig near Oslo, Norway. Apothecia 0.5-0.7 mm.  Margin almost dentate from bundles of glassy (?) hairs. I am struggling to see the spores clearly inside the asci, and even more difficulties photographing them with my simple setup, but they appear clavate-fusiform (rounded apically) with one apical SB occupying only a small area of the spore. It's difficult to see the shape of the SB, but definitely somewhat longer than wide. The paraphyses are septate, cylindrical and with a triangular exudate cap (stained in CR). Dead (?) asci are apically truncate. There are large, globose cells n the ectal excipulum. I am quite sure there are croziers.  And finally, there are bundles of glassy (?), elongate cells, presumably forming the dentate margin.

Are we in Section Piliferae and could it be O. pilifera?  I don't find the capped paraphyses mentioned for that species.  But the substrate host fits.

All micro images in CR in a drop of water, from fresh apothecium.
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Edvin Johannesen, 20-05-2021 17:28
Edvin Johannesen
Re : Orbilia pilifera?
Some more photos.
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Edvin Johannesen, 20-05-2021 17:31
Edvin Johannesen
Re : Orbilia pilifera?
Note: The first photo in the second part shows spore bodies in two spores and not an amyloid ascus apex!
Hans-Otto Baral, 20-05-2021 17:52
Hans-Otto Baral
Re : Orbilia pilifera?
These are typical glassy processes at the margin, and the ascus base is bifurcate but most probably never with croziers (the branches must be both attached to the same basal cell, then it would be a crozier).

I guess the spores were rather narrow, maybe 1,5 µm. Glassy processes exclude O. pilifera. I suggest this is Orbilia rubella.

Regrettably, everything is dead, except for the spores with SBs that you mention. Did you try a water mount?

Zotto
Edvin Johannesen, 20-05-2021 18:00
Edvin Johannesen
Re : Orbilia pilifera?
Thanks Zotto.  The material is fresh. I thought a drop of CR in water would't kill the asci etc. But I will try plain water. I have a problem with digital noise on the camera at high magnification, but will do my best.
Edvin Johannesen, 20-05-2021 18:36
Edvin Johannesen
Re : Orbilia pilifera?
I have studied the material in water and compared closely with O. rubella in you great epos, and it fits prefectly.  The spores are indeed 1-1.5 microns broad and the small, apical SBs are distinct, as well as the capped parafyses, glassy cells etc.  Thanks a lot!