Favolaschia nana Q. Y. Zhang, H. Zhao & Y. C. Dai 2026, sp. nov.

Favolaschia nana Q. Y. Zhang, H. Zhao & Y. C. Dai sp. nov. Fig. 2 Type. China, Sichuan Province, Bazhong, Nanjiang County, Micangshan National Forest Park, 25 Sep 2023, 32.692497, 106.915801, dead bamboo, collected by Yu-Cheng Dai, Dai 26137 (BJFC 043687, holotype). Etymology. “ Nana ” (Lat.): refers to the species having very small basidiomata. Macrostructures. Basidiomata annual, gregarious, gelatinous when fresh and dry. Pilei up to 2 mm, oval or elliptical; pileal surface white when fresh, dark gray or brown upon drying, convex with a reticulate pattern matching the pores below, faintly pruinose when dry; margin straight, crenulate; context thin. Hymenophore paler than pileal surface, grayish-white when fresh and ash-gray when dry, poroid, about 5–12 pores per basidiomata; mature pores 0.6–1 mm diam., polygonal, larger near the base and smaller near the edge, the marginal pores often incomplete; tubes up to 0.2 mm long. Stipe absent. Microstructures. Basidiospores (5.6 –) 6–9 (– 9.2) × (4 –) 4.3–6.5 (– 6.7) µm, L = 7.93 μm, W = 5.67 μm, Q = 1.39–1.40 (n = 60 / 2), broadly ellipsoid, hyaline, thin-walled, smooth, with one big or some small guttules, faintly IKI +, CB –. Basidia 22–37 × 8–12 μm, clavate to pyriform with some guttules, 2 – spored, sterigmata 1.8–5 μm long; basidioles mostly pyriform, tapering gradually toward the base, slightly smaller than basidia. Gloeocystidia and acanthocystidia absent. Cheilocystidia 12–18 × 5.5–10 μm, present at dissepiment edge, broom-shaped or irregular with small diverticulate projections on the sides and at the apex, thin-walled. Pileipellis hyphae interwoven, smooth to diverticulate, thin-walled, swollen, up to 8.5 µm in diam.; terminal cells cylindrical or clavate, with obtuse diverticulate projections at the apex, orientated perpendicular to pileal surface. Tramal hyphae interwoven, widely spaced in a gelatinous matrix, some with dense contents, some collapsed, thin-walled, 1.8–5 μm in diam. Clamp connections present. Additional specimens examined. China, Sichuan Province, Bazhong, Nanjiang County, Micangshan National Forest Park, 25 Sep 2023, 32.692497, 106.915801, dead bamboo, collected by Yu-Cheng Dai, Dai 26133 (BJFC 043683), Dai 26136 (BJFC 043686). Distribution and ecology. Favolaschia nana is distributed in subtropical area of Sichuan Province, China; it grows on dead bamboo and causes a white rot.