Cudoniella clavus? - Forum ASCOFrance

07-06-2026 18:18

Mollisia

Mario Schulz

Hello everyone, i found on 31.5 the following Mol

05-06-2026 11:02

Laterally compressed apothecia with blue pigments, bitunicate asci and 4-celled brown spores - Denmark

Thomas Læssøe

https://svampe.databasen.org/observations/10596691

07-06-2026 15:10

Hymenoscyphus albidus?

William Slosse

Hello everyone,On 05-06-26, I found following asco

07-06-2026 12:43

Mycoparasite of Pyrenomycete?

Steve Clements

Bojour. This was a strange find on a stick on my

07-06-2026 12:09

Lachnum sp. (nudipes) sur Filipendula

François Freléchoux

Bonjour, Voici une brève description de ce qui m

12-07-2015 00:05

Peziza paludicola or something else?

Nedim Jukic

This one from the same locality as the previous on

06-06-2026 17:44

Immature Hyaloscypha fuckelii?

Steve Clements

Bonjour, This disco was on planed wood 3 x 1.5 cm

14-08-2016 23:15

Tapesia from Rhododendron

Alex Akulov

Dear friendsCan you help me to find the descriptio

04-06-2026 23:53

Cistella sacconii

Stip Helleman

Dear all, someone can get acces to this article f

04-06-2026 11:36

Tryblis-like on Vaccinium myrtillus

Gernot Friebes

Hi,found on Vaccinium myrtillus.Asci: IKI –, 8-s

« < 1 2 3 4 5 > »

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

Hans-Otto Baral, 11-06-2012 09:17

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

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

Accès membres

Forum AscoFrance