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31-08-2025 17:32

Michel Hairaud Michel Hairaud

Bonjour, Pas d'identité trouvée pour cette réc

01-09-2025 08:42

François Corhay

Un ami, conservateur d'une RN en Belgique, m'a adr

01-09-2025 08:42

François Corhay

Un ami, conservateur d'une RN en Belgique, m'a adr

01-09-2025 08:41

François Corhay

Un ami, conservateur d'une RN en Belgique, m'a adr

31-08-2025 19:41

Enrique Rubio Enrique Rubio

Hi to someone.I need to download this issue of Sve

31-08-2025 14:34

Thomas Flammer

I have found a Rutstroemia on abt. 2000 m on Alnus

29-08-2025 19:04

Thomas Flammer

Spores 21.2 - 26.2 x 8.3 - 11.3 µm - Q: 2.20 - 2.

30-08-2025 18:29

Joaquin Martin

Hi,I found this undetermined ascomycete on broadle

28-08-2025 17:24

Thomas Flammer

I know, that this is not the real topic of this fo

29-08-2025 05:16

Francois Guay Francois Guay

I think I may have found the teleomorph of Dendros

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Orbilia spec. 1
Gernot Friebes, 29-11-2009 12:48
Hi,

I found these two Orbilia on a dead, still attached branch of Rosa, ca. 150 cm above the ground.

The first species (the one I show here) has spores of 6-8(9) x 2-3 µm with straight SB which fill 1/2 to 2/3 of the spores. The asci are 8-spored and the paraphses often septate (they look somehow chain-like).

Thanks in advance your help!

Best wishes,

Gernot
  • message #9640
Gernot Friebes, 29-11-2009 12:49
Re:Orbilia spec. 1
micros
  • message #9641
Gernot Friebes, 29-11-2009 12:49
Re:Orbilia spec. 1
spores
  • message #9642
Jean-Paul Priou, 29-11-2009 14:02
Jean-Paul Priou
Re:Orbilia spec. 1
cela devrait aller vers gambelli
jPP
Hans-Otto Baral, 29-11-2009 15:31
Hans-Otto Baral
Re:Orbilia spec. 1
Another possibility would be O. trapeziformis. O. gambelii has usually ellipsoid spores and trapeziformis trapezoid, but sometimes the difference is not as clear. A distinct difference is in the SCBs. Could you please make a median section and look in the living excipular cells on flanks and margin? O. gambelii has there rather conspicuous SCBs (angular, usually pale orange) which trapeziformis never has.

O. gambelii is a (sub)mediterranean species. But O. trapeziformis I so far never had on Rosa.

Perhaps you could make more spore photos: Is there sometimes a short tail or at least a more tapered spore base?

Zotto
Gernot Friebes, 29-11-2009 18:16
Re:Orbilia spec. 1
Hi,

well, now I know that Orbilia is a really mean genus. I wanted to make a section of an apothecium and suddenly there were different spores - there is a third species on the substrate. I'll show it as Orbilia spec. 3.

Now to O. trapeziformis/gambelii. I think it is trapeziformis because of the form of the spores (there were some with a tail which I, however, could not photograph because they always swam away) and because there weren't any SCBs in the excipular cells.

Best wishes,

Gernot
  • message #9652
Gernot Friebes, 29-11-2009 18:18
Re:Orbilia spec. 1
spores
  • message #9653
Hans-Otto Baral, 29-11-2009 20:37
Hans-Otto Baral
Re:Orbilia spec. 1
Splendid! These star-shaped Trinacrium-conidia belong to Orbilia, and well possibly to this trapeziformis, but they could belong also to another one, though surely not to clavuliformis and septispora. Who knows how many you will further detect :-)

Zotto