Burgoa wumengshanensis Q. Zhou & C. L. Zhao sp. nov.

Figs 9, 10, 11

Holotype.

China • Yunnan Province: Zhaotong, Yiliang County, Luozehe Town, Lijiaping Village, Wumengshan National Nature Reserve, GPS coordinates: 27°29′N, 103°55′E, altitude: 1900 m asl., on the fallen branch of angiosperm, leg. C. L. Zhao, 19 September 2023, CLZhao 33227 (SWFC).

Etymology.

wumengshanensis (Lat.): refers to the locality, Wumengshan National Natural Reserve, of the type specimens.

Description.

Basidiomata annual, resupinate, adnate, pellicular, pruinose upon drying, without odor or taste when fresh, up to 7.4 cm long, 2.1 cm wide, 40–90 µm thick. Hymenial surface smooth, white when fresh, turning to pale cream upon drying. Sterile margin thin, white, up to 1 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, sometimes with oily contents, colorless, slightly thick-walled, frequently branched, interwoven, 3.5–5 µm in diameter; IKI –, CB –, tissues unchanged in KOH.

Cystidia schizopapillate, colorless, thin-walled, smooth, 30.5–49 × 5.5–8 µm; cystidioles clavate, colorless, thin-walled, smooth, 22–29.5 × 5–8 µm. Basidia urniform, with a median constriction, slightly thick-walled, with 8 sterigmata and a basal clamp connection, 12–20 × 3.5–6 µm; basidioles abundant, in shape similar to basidia, but slightly smaller.

Basidiospores ellipsoid, colorless, thin-walled, smooth, with oil drop, IKI –, CB –, (3.5) – 4–5.5 (– 6) × 2–3.5 µm, L = 4.5 µm, W = 2.78 µm, Q = 1.62 (n = 30 / 1).