21-05-2025 17:28
éric ROMERO
Bonjour Tous, Avec la bonne fiche cette fois (mer
19-05-2025 09:42
Josep Torres
Hello.An ascomycete photographed on April 20, spro
21-05-2025 08:31
Josep Torres
Reddish-brown, grain-like ascomata, measuring 0.7â
20-05-2025 22:15
Francois Guay
I found this ascomycete at the base of a dead fern
20-05-2025 21:36
Francois Guay
I found this Mollisia sp. on a submerged herbaceou
16-05-2025 05:47
Francois Guay
I found this super tiny hyaline asco on fir needle
Very hard black Pyrenomycete
Ethan Crenson,
19-04-2016 18:29
I hope someone can help me get somewhere with this Pyrenomycete. I see it often and I'd really like to know what it is. It is a black Pyrenomycete that envelopes whole stumps and logs, probably of hardwood. The stromata are rough, cone-shaped, up to a millimeter wide and tall, some with a large round ostiole. It renders the wood extremely hard-- getting a small sample takes a lot of effort or a saw. Please take a look at my photos of sections and microscopic features. There were not a lot of micro features that I could recognize. I only saw 3 spores, 2 and 3-septate, thick-walled, ranging from 12- 24 x 3.5-4.5 microns. Thanks in advance for your help.
Ethan
Thomas Læssøe,
19-04-2016 19:24
Re : Very hard black Pyrenomycete
It would be good to know in which region of the world you find these things and on which hosts. Your fungus resemples Eutypa spinosa on Fagus but then you haven't seen the real spores or asci. best wishes
Ethan Crenson,
19-04-2016 19:38
Re : Very hard black Pyrenomycete
Thomas, I am in Eastern North America, New York City. This Pyrenomycete occurs throughout the city and beyond. I found this specimen in Pelham Bay Park in the Bronx, a woods composed of mostly Beech and Oak. It is very hard to know the exact substrate, as the wood is always decorticated and nearly entirely enveloped in the Pyrenomycete.Â
When you say I "haven't seen the real spores" can I take that to mean that the ones shown are likely contamination? I had suspected that.Â
Thank you for your comments.
When you say I "haven't seen the real spores" can I take that to mean that the ones shown are likely contamination? I had suspected that.Â
Thank you for your comments.
Thomas Læssøe,
19-04-2016 20:02
Re : Very hard black Pyrenomycete
yes, most likely contaminations. In these fungi the perithecia are often deeply imbedded below the crust so try to cut very deep and add a drop of water. If the fungus is alive the perithecial contents will swell and can be picked with a sharp point. Good luck