taxonID	type	description	language	source
03E687E43771FFADFF4FFF6EFD8AFE62.taxon	etymology	Etymology: Sinosquamosus (Lat.) refers to the new species’ similarity to Polyporus squamosus and its discovery in China. Type: — CHINA. Heilongjiang Province, Harbin, Laodong Park, on rotten angiosperm root, 27 July 2024, Dai 29814 (BJFC). Holotype DNA sequences: PQ 306797 (ITS), PQ 306794 (LSU). Description: — Basidiomata annual, eccentrically stipitate, leathery, and without odor or taste when fresh, corky to slightly fragile when dry. Pilei flat with a depressed center, up to 12 cm in diameter and 4 mm thick at the center. Pileal surface buff-yellow to light brown when fresh, honey-yellow to grayish brown when dry, glabrous at margin squamosus at the center; margin sharp, incurved upon drying. Pore surface white to cream when fresh, honey-yellow to grayish brown when dry; pores angular, usually elongates or irregular, mostly 0.5 – 1 per mm, occasionally elongated to 2 mm long and 1 mm wide; dissepiments thin, entire to lacerate. Context white to cream when fresh, cream to light ivory when dry, corky upon drying, up to 2 mm thick. Tubes concolorous with pore surface, fragile, decurrent on the stipe, up to 2 mm long. Stipe brown to black, glabrous, up to 7 cm long and 2.5 cm in diam. Hyphal structure — Hyphal system dimitic; generative hyphae bearing clamp connections; skeleto-binding hyphae IKI –, slightly CB +; tissues unchanged in KOH. Context — Generative hyphae dominant, colorless, thin- to fairly thick-walled, rarely branched, 3 – 4 μm in diam; skeleto-binding hyphae colorless, thick-walled, moderately branched, interwoven, 3.5 – 4.5 μm in diam. Tubes — Generative hyphae dominant, colorless, thin- to fairly thick-walled, rarely branched, 3 – 5 μm in diam; skeleto-binding hyphae, colorless, thick-walled, moderately branched, interwoven, 3.5 – 5 μm in diam. Cystidia and cystidioles absent. Basidia clavate, with a basal clamp connection and four sterigmata, 30 – 41 × 5.5 – 11 μm; basidioles in shape similar to basidia, but slightly smaller. Stipe — Generative hyphae infrequent, colorless, fairly thick-walled, rarely branched, 2 – 3.5 μm in diam.; skeleto-binding hyphae dominant, colorless, thick-walled with a wide to narrow lumen, moderately branched, interwoven, 3 – 3.5 μm in diam. Basidiospores cylindrical to oblong ellipsoid, hyaline, thin- to slightly thick-walled, smooth, some with one guttule, IKI –, CB –, (9.2 –) 10.6 – 14.1 (– 14.8) × (4.8 –) 4.9 – 6.9 (– 7.1) µm, L = 12.29 µm, W = 5.85 µm, Q = 2.08 – 2.12 (n = 60 / 2) (the specimen Dai 26113 b is sterile). Additional specimens (paratypes) examined: — CHINA. Heilongjiang Province, Harbin, Maoershan Forest Park, on rotten angiosperm wood under grassland, 27 August 2023, Dai 26113 b (BJFC); Songle Park, on rotten angiosperm root, 5 August 2024, Dai 29815 (BJFC).	en	Zhuang, Lei, Luo, Kai-Yue (2025): Polyporus sinosquamosus sp. nov. (Polyporales, Basidiomycota), evidenced by morphological characteristics and phylogenetic analysis. Phytotaxa 691 (1): 93-102, DOI: 10.11646/phytotaxa.691.1.8, URL: https://doi.org/10.11646/phytotaxa.691.1.8
