Luteoporia flavula C.L. Zhao & H.M. Zhou, 2024

ZHOU, HONG-MIN, YANG, XIN, WANG, YU-YUN & ZHAO, CHANG-LIN, 2024, Morphological and molecular identification of two new wood-inhabiting macrofungi (Basidiomycota) from Yunnan-Guizhou Plateau, China, Phytotaxa 674 (1), pp. 1-17 : 11

Luteoporia flavula C.L. Zhao & H.M. Zhou , sp. nov. Figs. 3 , 4 .

MycoBank: MB 850569

Diagnosis: — It is characterized by the purple tissue in KOH, in contrast to the reddish colouration of L. straminea . Etymology: — Flavula (Lat.) refers to the lemon-chrome hymenial surface when fresh. Holotype: — CHINA. Guizhou Province, Guiyang, Qianlingshan Forest Park, on an angiosperm trunk, 25 August

2023, CLZhao 31245 (SWFC F0031245).

Basidiomata: —Annual, resupinate, ceraceous, without odor or taste when fresh, becoming hard upon drying, up to 1 cm long, 1.2 cm wide, 200–250 μm thick when dry. Hymenophore odontioid, lemon-chrome when fresh, curryyellow upon drying, tissue becoming purple in KOH. Sterile margin, narrow, and light lemon.

Hyphal structure: —Monomitic, generative hyphae with clamp connections, hyaline, thin‐ to thick‐walled, IKI-, CB-. Subicular hyphae unbranched, 2.5–4 μm in diam; subhymenial hyphae unbranched, 2–4 μm in diam; numerous yellow to yellowish brown gelatinous substances present among subhymenium. Hymenial cystidia subuliform, hyaline, thick‐walled, 15.5–30 × 3.8–5.7 μm, cystidioles absent; basidia 4-celled, clavate, with a basal clamp connection, 24– 29 × 4–5.2 μm. Basidiospores oblong ellipsoid, hyaline, thin‐walled, smooth, occasionally with guttules, IKI-, CB-, (3.4–)4–5.2(–5.5) × (2.2–)2.3–3.2(–3.4) μm, L = 4.56 μm, W = 2.74 μm, Q = 1.63–1.71 (n = 90/3).

Additional specimens examined (paratypes): — CHINA. Guizhou Province, Guiyang, Qianlingshan Forest Park, on an angiosperm trunk, 25 August 2023, CLZhao 31241 (SWFC F0031241), CLZhao 31243 (SWFC F0031243).

Figures

FIGURE 3. Basidiomata of Luteoporia flavula (A, C) CLZhao 31245; (B, D) CLZhao 31241.

FIGURE 4. Microscopic structures of Luteoporia flavula (CLZhao 31245, holotype). (A) Basidiospores; (B) Basidia; (C) Basidioles; (D) Cystidia; (E) A section of hymenium. Scale bars: A = 5 μm; B–E = 10 μm.