Punctularia nigrodontea L. Wang & C. L. Zhao 2025, sp. nov.

Punctularia nigrodontea L. Wang & C. L. Zhao sp. nov. Figs 18, 19, 20 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 angiosperm trunk, leg. C. L. Zhao, 20 July 2023, CLZhao 30592 (SWFC!). Etymology. Nigrodontea (Lat.) refers to the new species having black basidiomata. Basidiomata. Annual, resupinate to effused-reflexed, adnate but easily separable, gelatinous, without odor or taste when fresh, up to 7 cm long, 3 cm wide, and 600 μm thick. Pileal surface smooth, rigid, fuscous (5 / 6 F 5) when fresh, fuscous (5 / 6 F 5) to black (51) upon drying; pileal back cushion-shaped grandinioid, rigid, black (51) when fresh, black (51) upon drying. Sterile margin narrow, black (51), up to 1 mm. Hyphal system. Monomitic; generative hyphae clamp connections, colorless, thin to thick-walled, smooth, rarely branched, interwoven, 3–7 µm in diameter; IKI –, CB –, tissues unchanged in KOH. Hymenium. Cystidia absent. Basidia clavate, flexuous, with a basal clamp connection and four sterigmata, 16–25 × 3–4.5 µm; basidioles numerous, in shape similar to basidia but smaller. Spores. Basidiospores ellipsoid, colorless, thin-walled, smooth, IKI –, CB –, 8.5–10 (– 10.5) × (4.5 –) 5–6 (– 6.5) µm, L = 9.24 µm, W = 5.47 µm, Q = 1.69 (n = 30 / 1).