I found this Psathyrella s.l. which is likely a new species for me. It has hazelnut-brown pileus with tiny white fibrils on the pileus (veil remnants) which goes beige-tawn when dry (hence hygrophanous). Because of these fibrils I do not think it is a Parasola. Spores sizes: (6.8) 7.4 - 8.4 (8.6) × (4.5) 5 - 5.7 (5.8) µm // Me = 7.9 × 5.3 µm; They have a wide germ pore. Cheilocystidia abundant, not very large / Pleurocystidia seen, rare or infrequent. The fibrils of the remnant veil seems to have some incrustated pigment. I think I have also seen Pileocystidia (not sure - see last image).
Any indication would be appreciated