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01-04-2025 23:18

Neonectria et autre
Yanick BOULANGER

BonsoirRécolté par un ami sur dans un tas de bra

29-03-2025 09:08

Daldinia microscopie essai
Martine Vandeplanque Martine Vandeplanque

Bonjour.J’ai essayé d’étudier un Daldinia.Qu

30-03-2025 10:24

Hymenelia prevostii/Clauzadea immersa
Gonzalez Garcia Marta

Good morning, I would like to know the opinion of

01-04-2025 10:35

Lachnum
Yanick BOULANGER

BonjourSur bois très pourriApothécie 0,2 - 0,5 m

31-03-2025 17:01

Seeking Assistance for Erasmus+ Visit Invitation
akcay mustafa emre

Hello everyone, My name is Mustafa Emre Akçay, a

30-03-2025 12:41

Gelatinosa en Acacia
Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia (España), r

24-03-2025 21:26

Kirschsteiniothelia atra ?
éric ROMERO éric ROMERO

Bonjour, J'ai besoin d'une confirmation ou infirm

29-03-2025 21:13

Cistella
Tomaz Vucko Tomaz Vucko

Hello! I found this Cistella on old stem of Impa

29-03-2025 06:21

Small white asco on incubated wood
Francois Guay Francois Guay

Hi! I found this interesting tiny ascomycete on i

29-03-2025 05:45

Ciboria / Rutstroemia (?)
Sebastien Basso

Hello, I'm conducting a mycological inventory in

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Capitotricha bicolor ?
Ethan Crenson, 16-03-2025 17:15
Hi all,

Found recently in a wooded park in New York City, among hardwoods including Quercus, Liriodendron, Liquidambar, Prunus. These were on a well rotted branch. My sense is that they are Capitotricha bicolor, but I'm not entirely sure, especially because I detect croziers at the ascus base. I did not find clusters of crystals at the hair ends, though there are crystals among hairs and elsewhere.

Spores hyaline, fusiform, 5.0-9.8 x 1.8-2.5µm

Asci IKI+, with apparent croziers (see photo), 45-50 x 4-4.5µm

Hairs are septate, minutely warted, encrusted with what appear to be crystals, occasionally inflated at the ends.

Paraphyses narrow, projecting above the asci up to 10µm.

Thank you in advance,

Ethan
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Alain BRISSARD, 16-03-2025 18:13
Re : Capitotricha bicolor ?
Merci Ethan
 Cependant on  ne peut pas retenir Capitotricha vu l'absence de paraphyses lanceolées
Il semble qu"il faille se pencher sur le genre Arachnopeziza ou Arachnoscypha dont les caractères conviennent mieux. Possible Arachnopeziza trabinelloides ??
Ethan Crenson, 16-03-2025 19:30
Re : Capitotricha bicolor ?
Alain,

Thank you for your reply.  I think that Arachnopeziza trabinelloides would have 1-septate spores. I neglected to mention that these spores are aseptate.  By coincidence, I found Arachnopeziza trabinelloides in a local park just yesterday.

Ethan
Hans-Otto Baral, 16-03-2025 21:37
Hans-Otto Baral
Re : Capitotricha bicolor ?
The yellowish disc is strange, otherwise it reminds me of Dasyscyphella nivea.