Rhodoantrodia purpurascens L. Wang & C.L. Zhao

Wang, Lu, Su, Jiangqing, Muhammad, Akmal & Zhao, Changlin, 2024, Two new wood-inhabiting fungal species (Polyporales, Basidiomycota) from Yunnan Province, China, Phytotaxa 647 (1), pp. 1-18 : 6-7

Rhodoantrodia purpurascens L. Wang & C.L. Zhao , sp. nov. Figs. 3 and 4 .

MycoBank no.: 851549

Etymology: — purpurascens (Lat.) : refers to the purple hymenial surface.

Holotype: — CHINA. Yunnan Province: Qujing, Qilin District , Cuishan Forest Park , GPS coordinates: 25°55′ N, 103°69′ E, altitude: 2245 m asl., on the fallen branch of angiosperm, leg. C.L. Zhao, 24 November 2022, C.L. Zhao 26267 ( SWFC!) .

Basidiomata: —Annual, resupinate, easy to separate from substrate, corky, and up to 8 cm long, 3 cm wide, and 4.5 mm thick. Pore surface pale lilac (54D) to lavender (18/19 A 4) when fresh, become greyish purple (98B) when dry; pores round, 2–3 per mm, dissepiments thin, entire. Sterile margin very narrow, greyish purple (98B), up to 0.5 mm. Subiculum cream (4 A 2/3), corky, up to 1 mm thick. Tubes thin, greyish purple (98B), corky, up to 3.5 mm long.

Hyphal system: —Dimitic; generative hyphae with clamp connections, hyaline, slightly encrusted with crystals, thick-walled, branched, interwoven, 2.5–3 µm in diameter, IKI–, CB –, tissues unchanged in KOH; skeletal hyphae colorless, thick-walled with a narrow lumen to subsolid, unbranched, straight to flexuous, 3–3.5 µm in diameter, IKI–, CB –; tissues unchanged in KOH.

Hymenium: —Cystidia absent; cystidioles fusoid, colorless, thin-walled, 17.5–25.5 × 2–3.5 µm. Basidia clavate to subcylindrical, hyaline, thin-walled, with a basal clamp connection and four sterigmata, 21.5–24.5 × 4.5–5.2 µm; basidioles dominant, in shape similar to basidia, but slightly smaller.

Spores: —Basidiospores ellipsoid, hyaline, thin-walled, smooth, IKI–, CB –, 5.5–7.5(–8) × 3–4 µm, L = 6.43 µm, W = 3.44 µm, Q = 1.87 (n = 30/1).

Figures

FIGURE 3. Rhodoantrodia purpurascens (holotype, C.L. Zhao 26267): basidiomata on the substrate (A), macroscopic characteristics of hymenophore (B). Bars: (A) = 1 cm and (B) = 1 mm.

FIGURE 4. Microscopic structures of Rhodoantrodia purpurascens (holotype, C.L. Zhao 26267):basidiospores (A), basidia andbasidioles (B), cystidia (C), a section of the hymenium (D), hyphae from context (E). Bars: (A–E) = 10 µm.