Phanerochaete wuyiensis K. Y. Luo, Yuan Yuan, Y. C. Dai & Xin Zhang sp. nov.

Figs 8, 9

Holotype.

China • Zhejiang Province, Jinhua, Wuyi County, Shiehu Scenic Spot; on a fallen branch of Pinus massoniana; 11. VIII. 2023; Y. C. Dai 25530 (BJFC 043078).

Etymology.

Wuyiensis (Lat.) refers to “ Wuyi County, Zhejiang Province, East China, ” where the holotype was found.

Description.

Basidiomata annual, resupinate, adnate, detachable from substrate, membranaceous, without odour and taste when fresh, up to 8 cm long, 3 cm wide, 200–300 µm thick. Hymenial surfaces smooth or locally tuberculate, uncracked, whitish when fresh and upon drying. Becoming lemon-yellow in KOH. Sterile margins distinct, concolorous with hymenial surface, with whitish rhizomorphs, and up to 1 cm.

Hyphal system monomitic, generative hyphae with simple septa and clamp connections, IKI –, CB –; tissue unchanged in KOH.

Subicular generative hyphae hyaline, thick-walled with simple septa and clamp connections, usually constricted at simple septa, sometimes with three branches at a single septum, interwoven, 3–16 µm in diameter. Subhymenial hyphae hyaline, thick-walled clampless, branched present, 2–3.5 µm in diameter.

Cystidia clavate to fusiform, hyaline, thin-walled, with a simple septum at the base, some apically encrusted with crystal granules, projecting above hymenium, 22–44 × 6–10 µm; cystidioles absent. Basidia clavate, with four sterigmata and a basal simple septum, 13–25 × 4–7 µm; basidioles of similar shape to basidia, but smaller.

Basidiospores ellipsoid, hyaline, thin-walled, smooth, with one or two medium guttules, IKI –, CB –, (3.3 –) 3.6–4.6 (– 5.4) × (1.8 –) 2.1–3.2 (– 3.4) µm, L = 4.07 μm, W = 2.48 μm, Q = 1.61–1.68 (n = 90 / 3).

Type of rot.

White rot.

Additional specimens examined (paratype).

China • Zhejiang Province, Wuyi County, Shiehu Scenic Spot; on a fallen branch of Pinus massoniana; 12. X. 2023; Y. C. Dai 26246 (BJFC 043796) • ibid. on rotten wood of Pinus massoniana; 12. X. 2023; Y. C. Dai 26250 (BJFC 043800) .