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

Figs 3, 4, 5

Holotype.

China • Yunnan Province, Zhaotong, Yiliang County, Longhai Town, Jianfeng mountain, GPS coordinates: 27°76′N, 104°37′E, altitude: 1777 m asl., on the fallen branch of angiosperm, leg. C. L. Zhao, 26 August 2023, CL Zhao 31820 (SWFC).

Etymology.

albofarinacea (Lat.): refers to the albicans and farinaceous hymenophore of the type specimens.

Description.

Basidiomata annual, resupinate, adnate, pellicular, coriaceous, without odor or taste when fresh, up to 11.5 cm long, 2 cm wide, 50–100 µm thick. Hymenial surface smooth, farinaceous, white when fresh and drying, cracked. Sterile margin thin, white, thinning out, up to 1 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, sometimes with oily contents, colorless, slightly thick-walled, frequently branched, interwoven, 3.5–5.5 μm in diameter; IKI –, CB –, tissues unchanged in KOH.

Cystidia and cystidioles absent. Basidia suburniform to urniform, slightly thick-walled, with 8 sterigmata and a basal clamp connection, 10.5–22 × 3.5–7 μm; basidioles abundant, in shape similar to basidia, but slightly smaller.

Basidiospores ellipsoid to allantoid, colorless, thin-walled, smooth, with oil drop, IKI –, CB –, (4 –) 4.5–6.5 (– 7) × 2–4 μm, L = 5.34 µm, W = 2.83 µm, Q = 1.79–1.97 μm (n = 120 / 4).

Additional specimens examined (paratypes).

China • Yunnan Province, Zhaotong, Yiliang County, Longan Town, GPS coordinates: 27°73′N, 104°16′E, altitude: 1550 m asl., on the fallen branch of angiosperm, leg. C. L. Zhao, 27 August 2023, CLZhao 32026, CLZhao 31855 (SWFC) • Zhaotong, Yiliang County, Xiaocaoba Town, GPS coordinates: 27°26′N, 104°26′E, altitude: 2225 m asl., on the fallen branch of angiosperm, leg. C. L. Zhao, 28 August 2023, CLZhao 32468 (SWFC) .