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08-01-2013 18:20

Ceratostomataceae (?) on hardwood
Enrique Rubio Enrique Rubio

Hi againThese gregarious, small (up to 1 mm high),

06-01-2013 23:30

Asco on decorticated Salix
Yannick Mourgues Yannick Mourgues

Bonsoir.Trouvé au bord d'un ruisseau. Sur Salix d

07-01-2013 13:29

Hyaline asco on Tilia bark
Enrique Rubio Enrique Rubio

Hi againI need your help for to try this small, gr

05-01-2013 22:19

Operculate Discomycete from Abies bark
Alex Akulov Alex Akulov

Dear FriendsI need your help very much. I study sa

07-01-2013 01:58

Xylariaceae(?) from Panama
Esquivel-Rios Eduardo

Hi All.This fungi was found in a dead trunk, resem

06-01-2013 22:36

Brunnipila
Yannick Mourgues Yannick Mourgues

Bonjour à tous.Où puis-je trouver une clé de ce

05-01-2013 10:27

Zugospermella insignis
Joop van der Lee Joop van der Lee

This asco looks like Delitschia Didyma as far as

05-01-2013 04:40

Disco sp. - 50459
Roland Labbé

Bonjour !   Voici un mini disco de la région de

10-12-2012 11:19

Ascobolus hawaiiensis
Joop van der Lee Joop van der Lee

This one was found on cow dung. Fruitbody is white

01-01-2013 16:51

Setose ascomata on Trifolium arvense
Gernot Friebes

Hi,a friend sent me this tiny ascomycete growing o

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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.