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15-12-2025 21:11

Pyrenopeziza deunicinata c.f. ??
Hardware Tony Hardware Tony

Small clavate hairs, negative croziers and IKI bb

15-12-2025 07:09

indet. Rutstroemiaceae sp. on unk. fallen leaves
Danny Newman Danny Newman

indet. Rutstroemiaceae sp. on unk. fallen leavesMc

15-12-2025 21:47

reddish apothecia
Pol Debaenst

Good evening, On 12/11/2025 I found ascomycetes w

15-12-2025 15:54

Unknown anamorph
Johan Boonefaes Johan Boonefaes

Unknown anamorph found on the ground in coastal sa

15-12-2025 15:48

Melanospora cf. lagenaria on decaying polypore
Danny Newman Danny Newman

Melanospora cf. lagenaria on old, rotting, fallen

15-12-2025 07:05

Pseudosclerococcum golindoi (det: Zotto)
Danny Newman Danny Newman

Pseudosclerococcum golindoi (det: Zotto)near Cosb

15-12-2025 11:49

cf. Rodwayella on Rhododendron maximum
Danny Newman Danny Newman

ITS sequences from the following two collections B

15-12-2025 12:34

indet. Rhytismataceae on oak leaf
Danny Newman Danny Newman

indet. Rhytismataceae on oak leafnear Purchase Roa

09-12-2025 12:06

Hypobryon heterotropum
Andgelo Mombert Andgelo Mombert

Bonjour,Je recherche l'article concernant Hypobryo

13-12-2025 17:26

Lachnaceae?
Buckwheat Pete

Hello everyone,I have a rather interesting ascomyc

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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