Tapinella_panuoides

Description: Several specimens at different parts on a tree stump (possibly Pinus), close but not attached together. Oyster-like shaped agaric without stipe and with forked veins on narrow gills.
Pileus: Shell-like, flattish, smooth and dry, medium sized agaric with incurved margin. Largest specimen about 35-40mm in width and depth. Rhizoids attached to cap directly. Coloured orange dorsally but paler at the edges.
Stipe: Absent, attachment by several thick rhizoids.
Gills: Narrow, orange coloured, corrugated, forked and with shorter ridges.
Spore print: Mustard.
Colour test: Ammonia (10%) - Pileus flesh colour change to orange.

Microscopy:
Pileipellis: Filamentous hyphae with clamp connections and external pigmentation. Pileocystidia not seen.
Basidia: 4-spored with long sterigmata.
Gill trama: Parallel.
Cheilocystidia: Absent.
Pleurocystidia: Absent.
Spores: Ellipsoid, with a central large oil drop, smooth without germ pore; 4.5-6.5µm x 3.6-4.7µm,
Q= 1.15-1.47, Qm = 1.31

Identified with help from Mr. E Lanfranco