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14-03-2025 22:05

Bâtonnets noirs
Yanick BOULANGER

BonsoirSur écorcePetits bâtonnets friable, tortu

16-03-2025 17:15

Capitotricha bicolor ?
Ethan Crenson

Hi all, Found recently in a wooded park in New Yo

16-03-2025 15:06

A l'aide
Alain BRISSARD

Bonjour au forumAprès plusieurs tentatives je m'e

16-03-2025 19:17

Lachnum or Dasyscyphella?
Pavel Jiracek

Another find on a piece of Quercus Wood in Scotlan

13-03-2025 19:16

Wood anatomy
Enrique Rubio Enrique Rubio

By means of these photographs could anyone identif

16-03-2025 11:04

Recherche article / Searching for a paper
Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour.Je cherche une copie de l'article suivant:

13-03-2025 16:50

Orbilia frangulae?
Harald Homa Harald Homa

Good evening Another find I'm looking for help wi

15-03-2025 13:10

Heteroconium? on Nemania serpens
Edvin Johannesen Edvin Johannesen

These hair balls are growing on top of Nemania ser

14-03-2025 23:29

coprophilous Scutellinia
Warre Van Caenegem

Good evening everyone. Last year, I found this cop

12-03-2025 17:54

Scutellinia hyperborea?
Karl Soler Kinnerbäck

Hi all!Do you agree with Scutellinia hyperborea? P

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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.