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

Wang, Lu, Zhu, Yonggao, He, Siyuan, Jabeen, Sana & Zhao, Changlin, 2025, Additions to the coriaceous families Peniophoraceae and Stereaceae (Russulales): Six novel wood-inhabiting taxa in the genera Conferticium, Gloeocystidiellum, and Peniophora from southwest China, MycoKeys 115, pp. 273-308 : 273-308

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

Figs 15 , 16

Holotype.

China. • Yunnan Province: Zhaotong, Xiaocaoba, Wumengshan National Nature Reserve , GPS coordinates: 27°77'N, 104°25'E, altitude: 1900 m asl., on the fallen angiosperm branch, leg. C. L. Zhao, 21 Sep 2023, CLZhao 33769, GenBank: ITS = PQ 066418 ( SWFC!).

Diagnosis.

It is characterized by pink to slightly purple, cushion-shaped, smooth membranaceous basidiomata, a monomitic hyphal system with simple-septa, thick-walled generative hyphae, and allantoid basidiospores.

Etymology.

Punctata (Lat.): refers to the species having cushion-shaped basidiomata.

Description.

Basidiomata. Annual, resupinate, closely adnate, cushion-shaped, membranaceous, without odor or taste when fresh, up to 3 cm long, 1.5 cm wide, and 300 μm thick. Hymenophore smooth, pink to slightly purple when fresh, purple upon drying. Sterile margin narrow, white to vinaceous, up to 1 mm.

Hyphal system. Monomitic; generative hyphae with simple-septa, colorless, slightly thick-walled, smooth, rarely branched, rarely septate, more or less parallel to substrate, 2.5–3.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH.

Hymenium. Cystidia of two types: (1) Gloeocystidia fusiform or subclavate, slightly flexuous, colorless, slightly thick-walled, smooth, 31.5–51.5 × 6–8 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, 36–39 × 8.5–12.5 µm. Basidia subcylindrical to subclavate, slightly flexuous, with a basal simple septum and four sterigmata, 18–21.5 × 3–4.5 µm; basidioles numerous, in shape similar to basidia but slightly smaller.

Spores. Basidiospores allantoid, colorless, thin-walled, smooth, IKI –, CB –, 5–7 (– 7.5) × 1.5–2.5 µm, L = 6.08 µm, W = 2.22 µm, Q = 2.73 (n = 30 / 1).

Figures

Figure 15. Basidiomata of Peniophora punctata (holotype CLZhao 33769). Scale bars: 1 cm (A); 1 mm (B).

Figure 16. Microscopic structures of Peniophora punctata (holotype CLZhao 33769): basidiospores (A); basidia and basidioles (B); lamprocystidia (C); gloeocystidia (D); a section of the hymenium (E). Scale bars: 10 µm (A – E).