Lyomyces albomarginatus Y. F. Dai & C. L. Zhao sp. nov.

Figs 10, 11

Holotype.

China • Yunnan Province, Dali, Weishan County, QinghuaTown, Green Peacock Reserve, Jiangzui Village, GPS coordinates 25 ° 01 ′ N, 100 ° 11 ′ E, evel. 1500 m a. s. l., on a fallen branch of angiosperm, leg. C. L. Zhao, 18 July 2022, CLZhao 22551 (SWFC).

Etymology.

albomarginatus (Lat.), refers to the white margin of the basidiomata.

Basidiomata.

Annual, resupinate, adnate, without odor or taste when fresh, up to 8 cm long, 3 cm wide, and 150 µm thick. Hymenial surface cracked, slightly buff when fresh, turning to buff to slightly yellowish upon drying. Sterile margin slightly buff, up to 3 mm wide.

Hyphal system.

Monomitic, generative hyphae with clamp connections, colorless, thin to slightly thick-walled, rarely branched, interwoven, 2.0–3.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH.

Hymenium.

Cystidia numerous, tapering, thin-walled, smooth, 22.5–30.0 × 2.0–4.0 µm; cystidioles absent. Basidia cylindrical, colorless, thin-walled, with four sterigmata, 15.0–19.0 × 3.5–4.3 µm; basidioles in shape similar to basidia, but slightly smaller.

Basidiospores.

Elliposoid, colorless, thin-walled, smooth, with one guttate, IKI –, CB –, (3.5 –) 4.0–5.5 (– 6.0) × (2.5 –) 2.7–3.5 (– 3.7) µm, L = 4.89 µm, W = 3.13 µm, Q = 1.56 (n = 30 / 1).