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14-10-2023 11:29

Orange disks
Leif Goodwin

This summer I found some cup fungus on soil with a

26-04-2021 02:59

Literature request
Masanori Kutsuna

Hello everyone,I am looking for this articles. Ba

12-11-2023 23:47

Lophodermium neesii Duby
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Hallo, ich habe diesen Pyrenomyceten auf einem Bla

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Biscogniauxia sp.
Zetti Mario

I am not sure how much you can help me with these

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Podospora sp
Bruno Coué Bruno Coué

Bonjour,auriez-vous un avis sur la récolte ci-dss

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Cistella sur Pteridium aquilinum
Bernard CLESSE Bernard CLESSE

Une idée de nom pour ce Cistella trouvé sur pét

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Diplodia-like
Bernard Declercq Bernard Declercq

Hello,Collected on a fallen corticated branch of P

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Asco imparfait sur Pteridium aquilinum
Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Que pensez-vous de cet a

10-11-2023 12:59

literature search
Stoykov Dimitar Stoykov Dimitar

Hallo,I am looking for the description and illustr

05-11-2023 20:53

Another Helotiales - from Salzburg Austria
S. Rebecca

Here is a Helotiale fungi found at Werfen/Salzburg

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Orange disks
Leif Goodwin, 14-10-2023 11:29
This summer I found some cup fungus on soil with acer and black poplar. I struggled to get a spore print so only got a few spores. The asci and paraphyses are shown in Melzers, the spores in Lacto Cotton Blue. The disks are up to 2 cm wide. 

Someone suggested a Purpureodiscus species e.g. P. isabellinus. 

Help appreciated.
  • message #77143
  • message #77143
  • message #77143
Nicolas VAN VOOREN, 22-10-2023 11:19
Nicolas VAN VOOREN
Re : Orange disks
Macroscopically it looks like Purpureodiscus subisabellinus, but you should show some mature ascospores (in water). They measure 18.5-23.5 × 11-13 µm and show bipolar spore granules. The amyloid reaction of asci is only visible on the wall (W type), sometimes difficult to see.
Leif Goodwin, 13-11-2023 18:43
Re : Orange disks
Thank you for taking the time to reply, and apologies for my late response. I have given the specimen to someone who will amplify the ITS region of the DNA and then have it sequenced. When he returns it, I will try and find some mature spores. Hopefully the DNA sequencing will give us an answer, but sadly DNA does not always amplify, possibly because the primers are not ideal for ascos.