Peniophora hengduanensis L. Wang & C. L. Zhao, 2025

Peniophora hengduanensis L. Wang & C. L. Zhao sp. nov.

Figs 13 View Figure 13 , 14 View Figure 14

Holotype.

China. • Yunnan Province: Diqing, Weixi County, Zhonglu Town , GPS coordinates: 27°16'N, 99°15'E, altitude: 2250 m asl., on the fallen angiosperm branch, leg. C. L. Zhao, 14 Oct 2022, CLZhao 34697, GenBank: ITS = PQ 066422, nLSU = PQ 295870 ( SWFC!). GoogleMaps

Diagnosis.

It is characterized by pink to vinaceous, smooth membranaceous basidiomata, a monomitic hyphal system with simple-septa, and allantoid to subcylindrical basidiospores.

Etymology.

Hengduanensis (Lat.): refers to the locality (Hengduan Mountains) of the type specimen.

Description.

Basidiomata. Annual, resupinate, closely adnate, membranaceous, without odor or taste when fresh, up to 7.5 cm long, 4 cm wide, and 400 μm thick. Hymenophore smooth, pale pink when fresh, pink to vinaceous upon drying. Sterile margin narrow, white to vinaceous, up to 1 mm.

Hyphal system. Monomitic; generative hyphae with simple-septa, colorless, thin-walled, smooth, rarely branched, rarely septate, more or less parallel to substrate, 3.5–4.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH.

Hymenium. Cystidia of two types: (1) Gloeocystidia obclavate, colorless, slightly thick-walled, smooth, 50.5–66 × 11–14.5 µm; (2) Lamprocystidia abundant, subulate to subcylindrical, heavily encrusted with crystals in the middle and upper parts, thin-walled, colorless, embedded or projecting beyond the hymenium, with a basal simple septum, 21.5–25 × 9.5–11 µm. Basidia subcylindrical to subclavate, slightly flexuous, with a basal simple septum and four sterigmata, 20–32.5 × 4.5–6 µm; basidioles numerous, in shape similar to basidia but slightly smaller.

Spores. Basidiospores allantoid to subcylindrical, colorless, thin-walled, smooth, IKI –, CB –, (6 –) 6.5–8.5 (– 9) × 2.5–3.5 (– 4) µm, L = 7.35 µm, W = 3.15 µm, Q = 2.33 (n = 30 / 1).