Tropicoporus nullisetus

Tropical species on living trunks, with sessile, pileate basidiocarps, with a semicircular cap, 4 to 11 cm in diameter, surface with a hard dark brown to black crust, with 3 to 5 round pores per mm, golden brown, instantly turning black upon application of KOH, and with a hard and woody consistency.

Hyphal system dimitic, with thick-walled skeletal hyphae, without septa, yellow, 3.5 to 4.5 µm wide, unbranched, with walls up to 2 µm thick, darkening in KOH, and yellow generative hyphae, with thin to slightly thickened walls, 2.5 to 3 µm wide, septate with simple septa.

Hyphae of tube edges cylindrical, arranged parallel, with rounded endings.

Without hymenial or subicular setae.

Basidia not observed.

Spores ellipsoidal, with one side more flattened, thick-walled, pale yellow in water, 3.5 to 5 µm long by 2.5 to 3.5 µm wide, and indextrinoid in Melzer's reagent.

Herbarium material available: JTP2051/24.