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24-03-2026 19:59

Sclerotinia binucleata?
William Slosse William Slosse

Hello everyone,On 23/03/26, I found the following

21-03-2026 15:13

MYXOMYCETICOLOUS FUNGI
Lepista Zacarias

Hello everyone, Does any one know of any literatu

24-03-2026 21:37

Helminthosphaeria
Elisabeth Stöckli

Bonsoir,Sur bois (tronc) très pourri de conifère

24-03-2026 21:07

Eupezizella aureliella ?
Ethan Crenson

Hello all, A friend collected this asco in a wood

23-03-2026 20:16

Coprotus 210226 315
Miguel Ãngel Ribes Miguel Ángel Ribes

Good eveningI'm unable to identify this Coprotus o

24-03-2026 15:44

Leptodontidium cf. trabinellum
Åge Oterhals

I hope someone can confirm the name of this collec

24-03-2026 11:58

Una para ID
Castillo Joseba Castillo Joseba

Me mandan el material de Galicia, recolectado en c

23-03-2026 13:24

Literature search
Paul Cannon

Could anyone provide me with a pdf of Auerswald's

20-10-2017 09:23

Hymenoscyphus ¿calycinoides?
Garcia Susana

Este otro crecía en el mismo trocito de madera qu

21-03-2026 22:59

Hysteriaceae ??
Petr Soucek

Good evening, I would appreciate some advice on th

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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.