Peniophorella subalbohymenia Q. Y. Zhang 2026, sp. nov.

Peniophorella subalbohymenia Q. Y. Zhang sp. nov. Figs 5, 6 Holotype. China • Fujian Province, Nanping, Laizhou Town, Lai Zhou Forestry Experiment Station, on fallen angiosperm branch, leg. Q. Y. Zhang, 20 June 2025, QY Zhang 141 (NJFC). Etymology. Subalbohymenia (Lat.): Refers to the morphological similarity and close phylogenetic relationship with P. albohymenia. Diagnosis. Peniophorella subalbohymenia is characterized by the membrana-ceous basidiomata with white hymenial surface, three types cystidia as stephanocyst, fusiform cystidia and lageniform cystidia, and ellipsoid basidiospores measuring 5–8 × 3.8–4.5 μm. Description. Basidiomata annual, resupinate, adnate, membranaceous, with-out odor or taste when fresh, up to 12 cm long, 5 cm wide, and with extremely thin layer. Hymenial surface smooth, white when fresh and dry. Sterile margin distinctly, thin, white, up to 5 mm long. Hyphal system monomitic; generative hyphae with clamp connections, thin-walled, colorless, occasionally branched, 2.5–5 μm in diameter, IKI –, CB –, tissues unchanged in KOH. Cystidia of four types: (1) stephanocyst, thin-walled, with a ring-like wart protrusion on the upper-middle part, 13–17 × 9–10 μm; (2) fusiform cystidia, the apical part encrusted with asteroid, smooth, thin-walled, 25–55 × 6–15 μm; (3) lageniform cystidia, thin-walled, with a relatively long neck, 30–60 × 8–10 μm. Basidia clavate, with four sterig-mata and a basal clamp connection, colorless, thin-walled, 18–25 × 6.5–8 μm; basidioles in shape similar to basidia, but slightly smaller. Basidiospores ellipsoid, colorless, thin-walled, IKI –, CB –, (4.8 –) 5–8 × (3.5 –) 3.8–4.5 (– 4.8) μm, L = 6.14 μm, W = 4.12 μm, Q = 1.45–1.53 (n = 60 / 2). Another specimen (paratype) examined. China • Fujian Province, Nanping, Laizhou Town, Lai Zhou Forestry Experiment Station, on fallen angiosperm branch, leg. Q. Y. Zhang, 20 June 2025, QYZhang 191 (NJFC).