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28-07-2011 18:31

Alex Akulov Alex Akulov

Dear FriendsToday I made the pdf file of Velenovsk

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

25-03-2024 03:56

B Shelbourne B Shelbourne

• Scuttelinia: Macro and habitat.• S. scutella

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Orbilia vitalbae?
Viktorie Halasu, 02-01-2022 22:35
Viktorie HalasuHello, 

I have here a small light rose to light orange Orbilia on xeric twig of Euonymus europaeus, small tree along a path near a riparian forest, coll. 1. 1. 2022. 
Spores as shown. Paraphyses capitate. Asci 8-spored, lower spores inverted, dead ascus' apex is truncate, not thickened. No crystallic SCBs seen, globose SCBs present in excipulum. Slightly crenulate margin made of exudate "teeth". No glassy outgrowths. 

Is it vitalbae or trapeziformis? The latter I've seen only once so I don't know the species well enough. But the spores seem to have more rounded lower pole and more note-shaped SB than trapeziformis. 

Thank you in advance.
Viktorie
  • message #71288
Hans-Otto Baral, 03-01-2022 07:35
Hans-Otto Baral
Re : Orbilia vitalbae?
For my memory this looks more like trapeziformis because of the constantly subacute apex. SB shape is not far from what I illustrate in that species. But our concept of trapeziformis appears to be heterogeneous based on the few sequences, and vitalbae has very different spore lengths, I always wanted to divide it but finally gave up. Anyway, in vitalbae the rounded to obtuse spore apices strongly prevail.
Viktorie Halasu, 03-01-2022 10:16
Viktorie Halasu
Re : Orbilia vitalbae?
Dear Zotto,

thank you for clarifying this collection. I was thinking about vitalbae because I saw some similarity with the spores of HB 9165a (that untypical Swiss O. vitalbae on Sambucus racemosa). The other trapeziformis from the same forest had more attenuated lower spore ends. 

Viktorie
  • message #71292
Hans-Otto Baral, 03-01-2022 10:46
Hans-Otto Baral
Re : Orbilia vitalbae?
Ah, these are typical! Indeed this Sambucus sample is dubious, we did not manage to assign it unequivocally, and an attempt to obtain DNA failed.