15-12-2025 07:05
Danny Newman
indet. discomycete on wood (unk.)near Cosby Campgr
15-12-2025 07:09
Danny Newman
indet. Rutstroemiaceae sp. on unk. fallen leavesMc
09-12-2025 12:06
Andgelo Mombert
Bonjour,Je recherche l'article concernant Hypobryo
12-12-2025 18:39
Mirek GrycHello everyone.Macrofeatures similar to Mollisia b
07-12-2025 16:07
Arnold BüschlenHallo, ich habe in einer Moos-Aufsammlung (epiphy
08-12-2025 21:04
Mark Stevens"Hello everyone,I'm relatively new to microscopy (
08-12-2025 18:59
Lothar Krieglsteiner
.. found by a seminar-participant, I do not know t
indet. discomycete on wood (unk.)
Danny Newman,
15-12-2025 07:05
indet. discomycete on wood (unk.)near Cosby Campground, Great Smoky Mountains National Park, Cocke County, Tennessee, USA
Collected during the 2025 Richard P. Korf Memorial North American Ascomycete Foray (aka "The Korf Foray), held at the Appalachian Highlands Science Learning Center in Purchase Knob, North Carolina.
2x ITS sequences were generated from this material, one matching Orbilia dryadum, while the other is very close to Papillospora hebetiseta. both have thus far been considered to be "off-target," as in sequences of a fungus which is not the focus of the collection/observation in question.
only two spores were ever able to be observed outside of asci, as seen in the first micrograph (credit: Connor Dooley). otherwise, photo credits are as follows:
macro photography: Connor Dooley
micrographs: Patrick A Verdier
some comments on microscopy from Patrick:
"The hymenium was embedded in an extracellular gel with odd iodine staining, sometimes maroon (high iodine) sometimes teal (low iodine) suggesting a strange mix of amyloid/dextrinoid, with some carotenoids thrown in. Paraphyses swollen tips included a weird doughnut shaped structure, in fresh specimens at least. Paraphyses tips were also highly absorbent in blue light, and even more so in UV light (using a monochrome camera and UV light source)"
"The hymenium was embedded in an extracellular gel with odd iodine staining, sometimes maroon (high iodine) sometimes teal (low iodine) suggesting a strange mix of amyloid/dextrinoid, with some carotenoids thrown in. Paraphyses swollen tips included a weird doughnut shaped structure, in fresh specimens at least. Paraphyses tips were also highly absorbent in blue light, and even more so in UV light (using a monochrome camera and UV light source)"
Any and all ID help is greatly appreciated. Additional micrographs may be generated upon request
crossposted to the Ascomycetes of the World FB group at https://www.facebook.com/groups/ascomycetes/posts/4143399475912225
Hans-Otto Baral,
15-12-2025 08:40
Re : indet. discomycete on wood (unk.)
Hi Danny
this should be Pseudosclerococcum golindoi. The spores in the type measured 10-12 x 4.5-5.5 and were 1-septate.
See paper Olariaga et al. , Mycological Progress (2019) 18:895–905
https://doi.org/10.1007/s11557-019-01500-7
https://doi.org/10.1007/s11557-019-01500-7
Zotto