Peniophorella punctata Y. L. Deng & C. L. Zhao 2025, sp. nov.

Peniophorella punctata Y. L. Deng & C. L. Zhao sp. nov. Figs 14, 15, 16 Holotype. China • Yunnan Province, Zhaotong, Xiaocaoba Town, Wumengshan National Nature Reserve, GPS coordinates: 27°33'N, 103°27'E, altitude 2300 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 21 September 2023, CLZhao 33732 (SWFC). Etymology. Punctata (Lat.): referring to the punctate basidioma of the type specimen. Diagnosis. Peniophorella punctata is characterized by the membranaceous, punctate basidiomata with white to pale yellow hymenial surface, fusiform cystidia, and allantoid basidiospores measuring 9.5–12.5 × 4–4.8 µm. Description. Basidiomata annual, resupinate, adnate, membranaceous, punctate, without odor or taste when fresh, up to 4 cm long, 3 cm wide, and 0.1 mm thick. Hymenial surface smooth, white to pale yellow when fresh, turning to aurantiacus to avellaneus upon drying. Sterile margin distinctly, thin, white, up to 2 mm long. Hyphal system monomitic, generative hyphae with clamp connections, thin-walled, colorless, occasionally branched, 2.9–4.6 µm in diameter, IKI –, CB –, tissues unchanged in KOH. Cystidia fusiform, slightly constricted at the neck and forms a long beak, thin-walled, 31–57 × 9–13.5 µm. Basidia clavate, slightly constricted in the middle, with four sterigmata and a basal clamp connection, colorless, thin-walled, 26.3–39.8 × 8.1–9.5 µm; basidioles in shape similar to basidia, but slightly smaller. Basidiospores cylindrical to allantoid, colorless, thin-walled, IKI –, CB –, (9.1 –) 9.5–12.5 (– 12.9) × (3.7 –) 3.9–4.8 (– 5.5) µm, L = 10.89 µm, W = 4.30 µm, Q = 2.53–2.54 (n = 60 / 2). Another specimen (paratype) examined. China • Yunnan Province, Zhaotong, Xiaocaoba Town, Wumengshan National Nature Reserve, GPS coordinates: 27°33'N, 103°27'E, altitude 2300 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 21 September 2023, CLZhao 33720 (SWFC). Notes. The phylogenetic analysis indicates that species P. punctata was placed within Peniophorella inferring from the dataset of ITS + nLSU. Morphologically, P. allantospora (Sheng H. Wu) K. H. Larss., P. capitulata (Boidin & Gilles) K. H. Larss., P. flagellata (G. Cunn.) K. H. Larss., P. pallida (Bres.) K. H. Larss. and P. praetermissa (P. Karst.) K. H. Larss. are similar to P. punctata based on the smooth hymenophore and allantoid basidiospores. However, P. allantospora differs from P. punctata by its shorter subutriformia to subclavata basidia (17–27 × 7.0–8.5 µm; Larsson 2007 b). P. capitulata in its presence of subcylindrica leptocystidia (25–50 × 4–7 µm; Larsson 2007 b). P. flagellata is distinct from P. punctata by its cream hymenial surface, obovate or subglobose stephanocysts, narrower basidia (28–40 × 7–8 µm) and shorter basidiospores (8–9 × 5–6 µm; Larsson 2007 b). P. pallida can be delimited from P. punctata by its whitish to ochraceous hymenial surface and longer fusiform cystidia (50–70 × 6–8 µm) and smaller basidia (20–25 × 5–6 µm; Larsson 2007 b). P. praetermissa can be separated from P. punctata by presence of three types of cystidia as fusiform gloeocystidia (50–100 × 8–12 µm), cylindrical leptocystidia (20–80 × 6–8 µm) and stephanocysts bowl-shaped, and narrower basidia (20–30 × 6–7 µm; Larsson 2007 b).