
06-05-2025 13:37
Thomas FlammerMunk, Anders (1953). The System of the Pyrenomycet

08-05-2025 20:50
Andreas JacobGood evening, due to contstant drought I started

07-05-2025 18:29

I found this small hyaline ascomycete on moist, de

08-05-2025 02:22

I found this white, hairy ascomycete on the bark o

08-05-2025 18:32
Ethan CrensonHello all, I was looking at leaves of Yucca from

08-05-2025 08:59
Me mandan el material de Galicia, (España) , reco

07-05-2025 10:18
Thomas FlammerI have found on Genistae sth. that looks like puli

05-05-2025 09:35

Bonjour à tous,Marie-Rose d'Angelo de la SociétÃ

06-05-2025 12:52
Me mandan el material de Galicia (España), reco
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
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 ??
 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

Re : Capitotricha bicolor ?
The yellowish disc is strange, otherwise it reminds me of Dasyscyphella nivea.