Fulvoderma yunnanense C.L. Zhao, 2023

Li, Jia-Jin, Yao, Lu, Liao, Jia-Yun, Yang, Shun-Qiang & Zhao, Chang-Lin, 2023, Morphological and molecular identification of a new species of Fulvoderma (Hymenochaetaceae, Basidiomycota) from the Yunnan-Guizhou Plateau, China, Phytotaxa 626 (1), pp. 32-40 : 36-37

Fulvoderma yunnanense C.L. Zhao , sp. nov. Figs. 3 , 4

MycoBank no.: MB 843524

Etymology: —unnanense (Lat.), refers to the location “ Yunnan Province ” where the type specimen was collected.

Holotype: — CHINA. Yunnan Province, Wenshan, Xichou County, Xiaoqiaogou, Wenshan National Nature Reserve , E 104°46′, N 23°22′, elev. 1541.5 m, on the angiosperm trunk, 14 January 2019, CLZhao 10854 (SWFC), Genbank No. ( ITS OL619281 ; nLSU ON075542 ).

Description: —Basidiomata annual, solitary, laterally stipitate, without odor or taste when fresh, corky to woody hard. Pilei applanate, projecting up to 8 cm long, 6 cm wide, and 2.6 cm thick at the base. Pileal surface reddish brown to fuscus, distinctly concentrically zonate and sulcate. Margin acute, honey-yellow. Pore surface greyish brown. Sterile margin cinnamon-buff, up to 3 mm wide; pores mostly circular, 4–6 per mm; dissepiments thick, entire. Context yellowish brown, hard, up to 1.5 cm thick, indistinctly concentrically zonate. Tubes greyish brown, hard, up to 0.2 cm long, tissue unchanged in KOH. Stipe up to 3 cm long and 1.7 cm diameter.

Hyphal structure: —Hyphal system monomitic; generative hyphae with simple septate, IKI–, CB–; tissues unchanged in KOH.

Subiculum: —Subicular generative hyphae colorless, hyaline, thin to thick-walled, branched, 2.5 – 6 µm in diameter.

Hymenium : —Cystidia tubular, 35–60 × 3. 0– 4.0 µm; basidia clavate, with 4 sterigmatas and a septum, 1 8.0–39.4 × 5.6–9.1 µm; basidioles dominant, in shape similar to basidia, but slightly smaller.

Spores: —Basidiospores broad ellipsoid to subglobose, colorless, thin-walled, IKI–, CB–, (3.7–)4.0–5.4(– 5.5) × (3.0–)3.3– 4.8(– 5.0) µm, L = 4.70 µm, W = 4.15 µm, Q = 1.13– 1.18 (n = 150/ 5).

Rot type: —A white rot.

Additional specimens(paratypes)examined: — CHINA. Yunnan Province,Wenshan,Xichou County,Xiaoqiaogou, Wenshan National Nature Reserve, E 104°46′, N 23°22′, elev. 1541.5 m, on the angiosperm trunk, 14 January 2019, CLZhao 10624, CLZhao 10651, CLZhao 10836, CLZhao 10841(SWFC).

Figures

FIGURE 3. Basidiomata of Fulvoderma yunnanense. A. The front of the basidiomata. B. The back of the basidiomata. Bars: A = 2 cm; B = 2 mm (Holotype: CLZhao 10854). Photoplate by: Jia-Jin Li.

FIGURE 4. Microscopic structures of Fulvoderma yunnanense (drawn from the holotype, CLZhao 10854). A. Basidiospores; B. Basidia and basidioles; C. Cystidia; D. Hyphae from context; E. Hymenium and hyphae from trama. Bars: A = 5 μm; B–E = 10 μm. Drawings by: Jia-Jin Li.