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

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

Figs 11 View Figure 11 , 12 View Figure 12

Holotype.

China. • Yunnan Province: Zhaotong, Fenghuangshan National Forest Park , GPS coordinates: 27°30'N, 103°70'E, altitude: 1950 m asl., on the fallen angiosperm branch, leg. C. L. Zhao, 24 Aug 2022, CLZhao 23473, GenBank: ITS = PQ 066419, nLSU = PQ 295867 ( SWFC!).

Diagnosis.

It is characterized by white to pale pink, smooth membranaceous basidiomata, a monomitic hyphal system with simple-septa generative hyphae, and allantoid to cylindrical basidiospores.

Etymology.

Albohymenia (Lat.): refers to the species having white basidiomata.

Description.

Basidiomata. Annual, resupinate, closely adnate, membranaceous, without odor or taste when fresh, up to 9 cm long, 3.5 cm wide, and 300 μm thick. Hymenophore smooth, white when fresh, white to pale pink upon drying. Sterile margin narrow, white, up to 1 mm.

Hyphal system. Monomitic; generative hyphae with simple-septa, colorless, slightly thick-walled, smooth, rarely branched and septate, more or less parallel to substrate, 4–4.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH.

Hymenium. Cystidia of two types: (1) Gloeocystidia fusiform, flexuous, colorless, thin-walled, smooth, 31.5–35.5 × 6–7 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, 31–42 × 10–13.5 µm. Basidia subcylindrical to subclavate, slightly flexuous, with a basal simple septum and four sterigmata, 23.5–26 × 4.5–6 µm; basidioles numerous, in shape similar to basidia but slightly smaller.

Spores. Basidiospores allantoid to cylindrical, colorless, thin-walled, smooth, IKI –, CB –, (7 –) 8.5–11 (– 11.5) × 3–4.5 (– 5) µm, L = 9.65 µm, W = 3.93 µm, Q = 2.46 (n = 30 / 1).