New Zealand: North Island: North Auckland: Omahuta, on rotten trunk of? Podocarpus sp., II May 1981. Horak. PDD 27253 (type: ZT 552. isotype). South Island: Westland: Hari-Hari on rotten log of? Melicytus sp. 13 Feb 1969, Horak (ZT 69/61).

Pileus -25 mm, convex to expanded, centre subdepressed in mature specimens, orbicular or subreniform in outline, non-striate margin inrolled; yellow-brown turning liver brown or chestnut brown with age; dry, conspicuously velvety or minutely squamulose, neither hygrophanous nor striate; veil remnants absent. Lamellae (14-24, -7), crowded; emarginate to subdecurrent with short tooth; brilliant golden yellow, changing to red-brown upon bruising or with brown spots in old basidiomes; concolorous edge even or subfimbriate. Stipe -20 x -2.5 mm. eccentric to sublateral, never central, always well developed, curved, equally cylindrical or swollen at base; concolorous with pileus or paler, below subpersistent cortina covered with yellow to whitish fibrils of veil; dry, fibrillose, at first solid becoming fistulose, rhizoids none, single or in clusters. Context yellow-brown turning reddish brown upon exposure. Odour not distinctive. Taste bitter. Spores 7-8.5 x 5-6 µm, pip-shaped, plage and supraapicular depression distinctive, covered with very coarse isolated warts embedded in pale brown conspicuous perisporium, membrane rust brown (in KOH), germ pore absent. Basidia 23-30 x 6-7 µm, 4-spored, cylindrical to suburniform. Cheilocystidia 15-30 x 3-7 µm, fusoid with ± capitate apex, hyaline or filled with conspicuous yellow-brown sap. Pleurocystidia absent. -Pileipellis a trichoderm composed of cylindrical hyphae (4-10 µm diam.), membranes strongly encrusted with brown to red-brown pigment readily dissolving in KOH, terminal cells apically rounded, not differentiated, membranes not gelatinised. Clamp connections on all septa.

New Zealand.

On rotten log of coniferous (Podocarpaceae) or broadleaved trees (Violaceae).

Gymnopilo macrospora (Singer 1973, 1966) persimilis est. sed sporis (7-8.5 x 5-6µm) et hyphis cutem pilei formantibus distincte minoribus.

Novazelandia. PDD 27263 (Holotypus).