Dendrocorticiopsis luteoalba L. Wang & C. L. Zhao 2025, sp. nov.

Dendrocorticiopsis luteoalba L. Wang & C. L. Zhao sp. nov. Figs 9, 10, 11 Typification. China. Yunnan Province • Dehong, Yingjiang County, Tongbiguan Provincial Nature Reserve, GPS coordinates: 25°50′N, 97°36′E, altitude: 1000 m asl., on the fallen angiosperm branch, leg. C. L. Zhao, 19 July 2023, CLZhao 30380 (SWFC!). Etymology. Luteoalba (Lat.) refers to the new species having a white to buff hymenophore. Basidiomata. Annual, resupinate, closely adnate, membranaceous, without odor or taste when fresh, up to 6 cm long, 2 cm wide, and 300 μm thick. Hymenophore smooth, white (60) when fresh, white (60) to buff (4 A 4) upon drying. Sterile margin narrow, white (60) to buff (4 A 4), up to 1 mm. Hyphal system. Monomitic; generative hyphae with clamp connections, colorless, thin- to slightly thick-walled, smooth, branched, interwoven, usually with crystal masses, IKI –, CB –, 2.5–4 µm in diameter; tissues unchanged in KOH. Hymenium. Cystidia are of two types: (1) capitate, apically with resinous materials, gradually dissolving in KOH, colorless, thin-walled, smooth, 8.5–14 × 6.5–8.5 µm; (2) gloeocystidia, clavate to subulate, slightly flexuous, colorless, thin-walled, smooth, 68.5–90 × 8–10 µm. Dendrohyphidia numerous, thick-walled toward base, colorless, 16–19 × 2.5–3.5 µm. Basidia subclavate to clavate, flexuous, with a basal clamp connection and four sterigmata, 15.5–28.5 × 4–5.5 µm; basidioles numerous, in shape similar to basidia. Spores. Basidiospores ellipsoid, colorless, thin-walled, smooth, IKI –, CB –, (6.5 –) 7–8 × (4 –) 4.5–5.5 µm, L = 7.29 µm, W = 4.97 µm, Q = 1.47 (n = 30 / 1).