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11-05-2025 17:57

Vibrissea (?) sur pétiole de feuille de salix
Louis DENY

Hello forumTrouvé dans les environs de Belfort,al

10-05-2025 18:47

Hyphomycetes
David Chapados David Chapados

Hi, Does anyone have an idea of what this could b

08-05-2025 20:50

Greyish aquatic asco
Andreas Jacob

Good evening, due to contstant drought I started

11-05-2025 10:22

Velutarina-like disco
Karl Soler Kinnerbäck

Found on moist Betula wood dipped in freshwater st

11-05-2025 10:35

Ascobolus en excremento de jabali
ruiz Jose

Hola, en excremento de jabali, tamaño de unos 2 m

05-05-2025 10:09

Crotte de lièvre
Nicolas Suberbielle Nicolas Suberbielle

Re-bonjour,Cet ascomycète trouvé et étudié par

09-05-2025 16:01

Chaetosphaerella phaeostroma (Anamorphe Oedemium minus).
Thomas Flammer

I found a black cushon which might eventually be 

09-05-2025 19:10

Orbilia on Betula bark
Enrique Rubio Enrique Rubio

Hi to everybody.This Orbilia (apos up to 0.5 mm),

02-05-2025 13:29

Bryomyces
Isabelle Charissou

Bonjour, j'aimerais savoir s'il y a eu des public

06-05-2025 13:37

Looking for digital literature of Munk Anders
Thomas Flammer

Munk, Anders (1953). The System of the Pyrenomycet

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Calycina claroflava?
Di Napier, 25-09-2023 11:04
Found on a rotting log in Warwickshire, UK.  I think these might well be Calycina claroflava: the septate spores are the right size c 7.5-9 x c 2-2.5um, and they are septate in the asci, so it isn't Calycina citrina.  However, the ascus length is quite a bit shorter (70-80 um) for the figure quoted for Calycina claroflava in Fungi of Temperate Europe (120-140).  The asci are perhaps slightly I+ or maybe I-.  I don't have any other literature with ascus size for this species. This is the second time I have collected a sample locally with the same spore and ascus features, so it would be good to have a name for recording. Thank you
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Hans-Otto Baral, 25-09-2023 11:15
Hans-Otto Baral
Re : Calycina claroflava?
The uploaded images are much too small to see or read something. Since you mounted in lethal media you cannot be sure with spore septation inside the asci, this needs to be checked in living asci. Negative IKI reaction and absence of croziers are essential, and living spores and their contents would be welcome.
Di Napier, 25-09-2023 11:40
Re : Calycina claroflava?
Thank you for the very helpful reply.  The photos were reduced as I didn't think full size ones could be uploaded (which is why I quoted the spore and asci measurements in the text), but maybe I over-reduced them.  I will try again with mounting in water.  I had not appreciated from FOTE that they needed to be live spores.  Is the iodine reaction with K as well as iodine? (I have had trouble with lichen identification where I using K as well as I when it was supposed to just be I, so I'm not too sure about how this one should be done.  Many thanks again.
Hans-Otto Baral, 25-09-2023 11:54
Hans-Otto Baral
Re : Calycina claroflava?
In lichens as in non-lichens you may always use Lugol without KOH. If Lugol (IKI) is negative you can be sure that K+IKI is also negative.

Ascofrance reduces the images automatically when they are too large.