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31-10-2025 09:19

literature request
Lothar Krieglsteiner Lothar Krieglsteiner

Can somebody provide me with a file of:Rogerson CT

30-10-2025 03:53

Dasyscyphella nivea?
Ethan Crenson

Hi all,  I would like an opinion on whether this

09-08-2025 13:13

Anthracobia but which one?
Maria Plekkenpol Maria Plekkenpol

Hello,Yesterday I found these on burnt soil. Apoth

28-10-2025 19:33

Rutstroemia firma
Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous,Je voudrais votre avis sur cette r

29-10-2025 19:02

Hymenoscyphus
Castillo Joseba Castillo Joseba

De la pasada semana en rama posiblemente de hayaPi

25-11-2016 13:54

Blue-green spored club-shaped fungus on seeds of Washingtonia
Stephen Martin Mifsud Stephen Martin Mifsud

Hi, I found numerous seeds of Washingtonia robusta

28-10-2025 22:22

Literature request
Bernard Declercq Bernard Declercq

Hello.I'm searching for the following paper:Punith

27-10-2025 19:51

Search
Peter Welt Peter Welt

Who has this article? Doveri, F. 2007. Sporormiel

28-10-2025 15:37

Bright orange stalked asco
Carl Farmer

I'd be grateful for any suggestions for this strik

28-10-2025 11:29

Asco on Quercus-leaves
Tanja Böhning Tanja Böhning

Hello, I found this very small (ca 0,5mm) yellow

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Eutypella ? on Crataegus sp.
Ethan Crenson, 20-02-2017 19:26
Hello,
From Central Park, NYC, on the bark of Crataegus sp. Short erumpant clustered black beaks that appear sulcate.  Perithecia surrounded by white powdery material.  Spores allantoid, yellow-brown.  Asci 8-spored, some with long stipes.  They appear IKI- though it is quite hard to discern.  Asci 48-58um by 6.5-8um. Spores with 1 or more guttules at each end.  8.5 - 12um by 1.5 - 2.5um. 
Any help would be greatly appreciated.
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Paul LEROY, 20-02-2017 22:30
Re : Eutypella ? on Crataegus sp.
Bonsoir Ethan,
Je suppose que ce spécimen est Eutypella leprosa. La forme un peu dyatripoÏde des stromas et l'entostroma blanc est caractéristique de cette espèce. Les mensurations ainsi que la couleur des spores conviennent également. L'appareil apical est amyloide mais assez difficile à obtenir, même après prétraitement KOH.
Cette espèce est présente en Europe et en Amérique du Nord sur différents arbustes et arbrisseaux dont Crataegus.
Paul
Ethan Crenson, 21-02-2017 15:21
Re : Eutypella ? on Crataegus sp.
Thank you Paul.  I have tried, but was not successful at viewing the apical apparatus by pretreating in KOH.  However, this was my first attempt at using that technique.  Are there any resources that might help me learn it properly?
Eduard Osieck, 22-02-2017 22:33
Re : Eutypella ? on Crataegus sp.
Hello,

See the comment by the expert in an earlier thread: http://www.ascofrance.fr/search_forum/27030 !!

Eduard