Burgella fissurata Q. Zhou & C. L. Zhao sp. nov.

Figs 6, 7, 8

Holotype.

China • Yunnan Province: Dehong, Yingjiang County, Tongbiguan provincial nature reserve, GPS coordinates: 24°30′N, 097°30′E, altitude: 1300 m asl., on the fallen branch of angiosperm, leg. C. L. Zhao, 19 July 2023, CLZhao 30212 (SWFC).

Etymology.

fissurata (Lat.): refers to the cracking hymenial surface of the type specimens.

Description.

Basidiomata annual, resupinate, adnate, pruinose, hypochnoid, without odor or taste when fresh, up to 10.2 cm long, 1 cm wide, 50–100 µm thick. Hymenial surface smooth, cracked, white when fresh, turning to pale cream upon drying. Sterile margin thin, white, thinning out, up to 1 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, colorless, thin-walled, frequently branched, interwoven, 2–4 μm in diameter; IKI –, CB –, tissues unchanged in KOH.

Cystidia umbrella-shaped, colorless, thin-walled, smooth, 5.5–10 × 4–6 µm; cystidioles absent. Basidia urniform, with a median constriction, thin-walled, with 4 sterigmata and a basal clamp connection, 6–11.5 × 2–4.5 μm; basidioles abundant, in shape similar to basidia, but slightly smaller.

Basidiospores narrowly ellipsoid, colorless, thin-walled, smooth, IKI –, CB –, (2.5 –) 3–4 × 1–2 μm, L = 3.36 µm, W = 1.63 µm, Q = 2.06 μm (n = 30 / 1).