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Mot de passe perdu? S'inscrire

21-07-2024 10:13

Mollisia fusca ?
Thierry Blondelle Thierry Blondelle

Bonjour,Récolte sur branchette de Castanea dans u

19-07-2024 10:24

Scutellinia
Kozak Robert

Date: 2024.07.16Loess gorges, on soil with a lot o

21-07-2024 10:28

Peziza on horse dung from California, USA
Alan Rockefeller Alan Rockefeller

Which Peziza did I find on horse dung in Humboldt

19-07-2024 11:08

Scutellinia nigrohirtula complex 090724
Miguel Ãngel Ribes Miguel Ángel Ribes

Good morningThis Scutellinia from July 9 grew at 1

21-07-2024 06:23

Literature search
Masanori Kutsuna

Dear all, Does anyone have these papers and send

08-07-2024 23:34

Scutellinia umbrarum?
Villalonga Paco

Small Scutellinia growing in garden soil (calcareo

04-12-2020 18:23

Marcelleina?
Mirek Gryc

Hello allA friend sent me two collections of small

17-07-2024 11:33

literature request
Angel Pintos Angel Pintos

Hello, anybody body has:Pande A. and Rao, V.G. (1

16-07-2024 18:32

Bryophilous disco on Liochlaena
Andgelo Mombert Andgelo Mombert

Bonsoir, Un discomycète sur Liochlaena lanceolat

17-07-2024 22:37

Another search
Peter Welt Peter Welt

Who can help? Arx, J.A. von. 1973. Ostiolate and

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Vibrissea flavovirens?
Stefan Jakobsson, 08-07-2022 02:34
I found a Vibrissea which in most respects resemble V. flavovirens. However, the color is more greyish than "flavovirens". Also the asci and spores are somewhat small. The living asci are on average 175 µm long and the spores about 130 µm. The 16-segmented spores behave as they should, break up into four part-spores with four segments: (24.8) 26.6 - 35.8 (40.9) × (1.2) 1.4 - 1.6 (1.7) µm.

Can it be confirmed that this is V. flavovirens?

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  • message #73277
  • message #73277
Hans-Otto Baral, 08-07-2022 08:39
Hans-Otto Baral
Re : Vibrissea flavovirens?
I think the colour is not so important. Since I do not have an overniew on available measurements, I cannot easily say if such small measurements ever occurred, but I do not know a further species with these characters.
Stefan Jakobsson, 08-07-2022 11:49
Re : Vibrissea flavovirens?
Thank you!

I looked up the asci and spore size in a few sources.
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Hans-Otto Baral, 09-07-2022 09:42
Hans-Otto Baral
Re : Vibrissea flavovirens?
Thanks for this survey. In my key I wrote for flavovirens:

asci *260-343 x 6.5-8.8 µm

spores *125-195 x 1.2-1.8 µm

spore fragments *(27–)30-42(–51) µm

Ascus measurements in your table are probably mostly in dead state, but the differences to living asci are apparently not very high.

In the type of V. minima Velen. on Salix, which I restudied and considered a synonym, I found asci +154 x 4.8-5.3 and spore fragments 27-48 µm. So your spore fragments are a bit shorter than usual.

In a collection from Sheffield (HB 9520) I measured spores *125-134 µm long (like yours), breaking into 4 part spores of *27-38 x 1.3-1.6 µm, 4-celled (ascus length  not measured).

In the case there is a continuum of measurements among collections, I suspect that living asci much shorter than 260 µm also occur.

Identities in the literature are perhaps not certain. E.g. Zheng & Zhuang 2017 do not mention the number of spore cells and fragments, but the spore photo suggests flavovirens indeed.