Description. Basidiocarps perennial, sessile or with a contracted lateral base, dimidiate, woody, solitary, applanate to ungulate, irregular to tuberculate, 2 - 13 x 2 - 22 x 0.5 - 10 cm; pileus surface rugulose, glabrous, dull, greyish-brown to black, margin obtuse, zonate, whitish; context firm, reddish-brown, 10 - 50 mm thick, becoming dark with KOH; pore surface light brown to yellowish-brown, pores circular, 4 - 6 per mm; tube layers concolorous with context or yellowish-brown, up to 40 mm thick. Hyphal system dimitic or trimitic; contextual generative hyphae thin-walled, with clamps, hyaline, 2 - 4 µm diam.; skeletal hyphae thick-walled, yellowish-brown, aseptate, 2 - 4 µm diam., branched; binding hyphae thick-walled, branched, hyaline, 1 - 2 µm diam. Cuticular cells from the pileus: absent. Basidia not observed. Basidiospores ovoid, truncate; with two walls, yellow, negative in Melzer's Reagent, 7 - 10 x 5 - 6 µm. Chlamydospores not observed.
Sumber: Taxonomy and phylogeny of the genus Ganoderma (Polyporales, Basidiomycota) in Costa Rica