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21-05-2025 17:28

éric ROMERO éric ROMERO

Bonjour Tous, Avec la bonne fiche cette fois (mer

23-05-2025 09:48

Josep Torres Josep Torres

Hello.A probable Diplodia located on a small Pista

22-05-2025 08:55

Josep Torres Josep Torres

Hello.A Pezizal sprouting scattered in small group

22-05-2025 17:17

Per Marstad Per Marstad

I have found this on Alnus glutinosa. Growing unde

19-05-2025 09:42

Josep Torres Josep Torres

Hello.An ascomycete photographed on April 20, spro

21-05-2025 08:31

Josep Torres Josep Torres

Reddish-brown, grain-like ascomata, measuring 0.7â

20-05-2025 09:37

Josep Torres Josep Torres

Hello, an anamorph photographed last April 20th, s

20-05-2025 22:15

Francois Guay Francois Guay

I found this ascomycete at the base of a dead fern

20-05-2025 21:36

Francois Guay Francois Guay

I found this Mollisia sp. on a submerged herbaceou

20-05-2025 10:31

Castillo Joseba Castillo Joseba

me mandan elmaterial seco de Galicia, (España) 

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Bisporella citrina??
William Slosse, 09-02-2016 20:32
William Slossegrowing on fallen dead branches of birch in old dunearea.
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Hans-Otto Baral, 09-02-2016 20:51
Hans-Otto Baral
Re : Bisporella citrina??
I think it is Calycina (earlier Bisporella) clariflava (= Bisporella sulfurina)

If you check the iodine reaction it should be negative. C/B. citrina has larger spores and amyloid asci.
William Slosse, 09-02-2016 21:43
William Slosse
Re : Bisporella citrina??

Thx for your reaction, Hans-Otto.


I'm new on this forum, but very pleased with this quick response.


I have still a fresh specimen in collection and I will check the reaction with Meltzer's reagens.


I found not a (good) key to convince me if it's citrina or sulfurina so I thought why not putting the question on this forum.


Nice to become some very interesting information from experts.

Hans-Otto Baral, 09-02-2016 21:54
Hans-Otto Baral
Re : Bisporella citrina??
You could also try to check the ascus base: citrina with croziers, claroflava without, but it is not easy.

Btw, it is better to use Lugol/IKI for testing ascus reactions.
http://invivoveritas.de/articles/iodine-reaction-in-ascomycetes-why-is-lugols-solution-superior-to-melzers-reagent/

best regards
Zotto
William Slosse, 09-02-2016 22:35
William Slosse
Re : Bisporella citrina??

The habitus of croziers is indeed for me something difficult to recognize.


I detected following structure while searching for asci etc. Can this be a crozier?

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Hans-Otto Baral, 09-02-2016 22:42
Hans-Otto Baral
Re : Bisporella citrina??
no, but on the left of your pic I see a bit unsharp that croziers are absent (asci are "simple-septate").
William Slosse, 09-02-2016 22:52
William Slosse
Re : Bisporella citrina??
Thx for all your info, Hans-Otto, very instructive for me!