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25-09-2023 11:04

Calycina claroflava?
Di Napier

Found on a rotting log in Warwickshire, UK.  I th

23-09-2023 14:08

Ascobolus crenulatus ?
Laurent Bonneau Laurent Bonneau

Bonjour, j'ai trouvé ces ascos sur Laissées de s

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Rutstroemia henningsiana?
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Dear Forum,On black remains, probably stromatized

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Literature search
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Literature search. Find these two articles. Who ca

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Ismael Wind

Is this hypomyces broomeanus? It was growing on he

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Sur Châton d'Alnus
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Je pense à un Dasyscyphus, 0,6 mm, asques 65 x5µ

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Hymenoscyphus with squarrulose stem
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In Tilia, Quercus, Corylus forest on calcareous so

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Hymenoscyphus
Margot en Geert Vullings

We found these ascomycetes in a damp ditch, most l

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Cheilymenia à l'étage alpin
Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Pourriez-vous m'aider à

27-08-2012 15:23

Desmazierella piceicola Huhtinen & Y. Mäkinen
Marja Pennanen

Hi,finding Desmazierella is not easy. I've been lo

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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.