pahill's Identifications

Single fruiting beneath Douglas fir and Western red cedar.
Harvested two sections of cap.
MICROSCOPY:
Removed a single gill and mounted in 3% KOH on a glass slide.
Gill edge: abundant with chain of “cystidia like” clavate cells.
Spores: ellipsoid to slightly pip shaped/curved. Smooth, medium sized.
Dehydrated both sections of cap and bagged for herbarium collection/genetic record.
My corresponding Mushroomobserver observation below-

https://mushroomobserver.org/548190?q=1oaSB

Fruiting in wood chips/woody debris that was laid last summer(Summer 2023).
Note: vertically arranged, ladder like/evenly distributed cap pits, darkened ridges. Occurrence in disturbed/impacted habitat.
Location/map obscured.

This is a very wood-like looking fungus with a bark textured top. It extends its base outwards like a shelf fungus and curves downward in the shape of a clamshell. These were found on a cut down tree, most likely feeding off of it as it decays.