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20-03-2026 12:53

Eutypa spec. (?)
Stefan Blaser

Hello everybody, In the field, from distance, my

20-10-2017 09:23

Hymenoscyphus ¿calycinoides?
Garcia Susana

Este otro crecía en el mismo trocito de madera qu

20-03-2026 16:16

Pseudomassaria-like on Cornus alba
Edvin Johannesen Edvin Johannesen

These 0.5 mm diam. acervuli were breaking through

19-03-2026 19:34

Xylariaceae? on Carpinus betulus wood
Filip Fuljer Filip Fuljer

Hello everyone,a few days ago I collected this str

19-03-2026 18:25

Myriosclerotinia curreyana?
William Slosse William Slosse

Good evening everyone, On 18/03/26 I found a few

17-03-2026 10:09

Lasiobelonium corticale ?
François Freléchoux François Freléchoux

Bonjour, Voici la description rapide d'un petit d

19-03-2026 15:58

"Lasiosphaerioid"
Stefan Blaser

Hello everybody, I hope for some hints... Macro:

19-03-2026 17:50

Massarina on Corylus
Enrique Rubio Enrique Rubio

Hi to everybodyThese thiny, blackish pseudothecia

18-03-2026 13:09

Orbilia on Celtis occidentalis
Khomenko Igor Khomenko Igor

I recently examined Celtis occidentalis branches

17-03-2026 19:41

Pyréno sur branche morte de chêne
Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Pourriez-vous m'aider à

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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