Going through your options:
- It can't be Cortinarius ahsii, I don't see any remains of the cortina and the spore print color does not match that of Cortinarius (rusty brown).
- I don't think it's Naematoloma capnoides. The spore print color does not match either, and I don't see any pine or fir needles around.
- Finally, it matches the ecology and spore print color of Psathyrella candolleana, but I'm not 100% sure that's the right specie, so it could be any other species of the genus Psathyrella.
Thank you for your good feedback. I am inclined to think that it is of the Psathyrella specie, but just not 100% sure. They are so fascinating.