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12-01-2026 05:24

Cyathicula coronata on Urtica dioica - 303628165
Danny Newman Danny Newman

Cyathicula coronata on Urtica dioicaCataloochee Di

11-01-2026 20:35

Pyrenomycete on Conifer Wood
Josep Torres Josep Torres

Hello.A very tiny pyrenomycete sprouting sparsely

15-12-2025 11:49

cf. Rodwayella on Rhododendron maximum
Danny Newman Danny Newman

ITS sequences from the following two collections B

09-01-2026 17:41

Bryonectria callicarpa Döbbeler; ein Bryoparasit auf Frullania dilatata
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Hallo, F. dilatata wird von vielen Bryoparasiten

10-01-2026 20:00

Lichenicolous fungus on Protoparmeliopsis muralis
Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

07-01-2026 22:22

Tatraea sp. on indet. hardwood - 303452087
Danny Newman Danny Newman

Tatraea sp. on indet. hardwood The Swag, Great Sm

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cf. Neovaginatispora fuckelii on indet. shrub - 305938906
Danny Newman Danny Newman

cf. Neovaginatispora fuckelii on indet. shrub Pre

07-01-2026 10:24

Pezicula sp. on indet. hardwood - 303870019
Danny Newman Danny Newman

Pezicula sp. on indet. hardwood Appalachian Highl

09-01-2026 10:08

Orbilia posible aurantiorubra
Blasco Rafael Blasco Rafael

Hola, en el mismo habitat que la anteriorRetamaDia

08-01-2026 21:22

Orbilia pilifera posible
Blasco Rafael Blasco Rafael

Hola, He recogido esta muestra de Orbilia sobre Re

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Cudoniella clavus?
Masanori Kutsuna, 11-06-2012 03:06

??Dear everyone.

This discomycete, frequently found in Japan, seems to be identical to Cudoniella clavus in macroscopic, microscopic, and ecological characters.
According to Dennis, etc., ascus pore of C. clavus is non-amyloid, but this ascus pore turns blue by IKI, more clearly with KOH pre-treatment. (I have no microphoto)
Is it true C. clavus?


Masanori Kutsuna



 

  • message #18900
Hans-Otto Baral, 11-06-2012 09:17
Hans-Otto Baral
Re : Cudoniella clavus?
I think your collection is very typical C. clavus.

In Huhtinen 1985: 511 (mycoflora Poste-de-la-Baleine?) the reaction is clearly blue after KOH. Also In my collections I saw repeatedly a distinct blue reaction in IKI (Hymenoscyphus-type).


However, at least in one (HB 1000, from Black Forest) ?I noted IKI-. This explains why authors like Dennis, Breitenbach & Kränzlin or Gamundi 1998: 114? likewise found inamyloid asci.


Zotto?

Masanori Kutsuna, 11-06-2012 09:27
Re : Cudoniella clavus?
Dear Zotto

Thank you for the answer.
Let me ask you a question.

If so, what is the difference between Hymenoscyhus and Cudoniella?

Regards,
Masanori Kutsuna 
Hans-Otto Baral, 11-06-2012 10:08
Hans-Otto Baral
Re : Cudoniella clavus?
That is a good question. The generic concept is under reorganization since many years. Hymenoscyphus will mainly comprise species with scutuloid spores (with a pointed base), but also some with homopolar spores. My idea is that Cudoniella includes also species such as Hymenoscyphus imberbis, immutabilis and fagineus, but I am not sure if molecular data support this in every case. To give characters of these genera is difficult. Only the consistent absence of scutuloid spores in the genera Cudoniella and Phaeohelotium seems to be a sharp difference to Hymenoscyphus. The convex disc in Cudoniella is probably not a good character.

Zotto
Masanori Kutsuna, 11-06-2012 10:14
Re : Cudoniella clavus?
Thanks again.

Regards,
Kutsuna