Xylodon xinpingensis C.L. Zhao & X. Ma, 2021

Ma, Xiang & Zhao, Chang-Lin, 2021, Xylodon bambusinus and X. xinpingensis spp. nov. (Hymenochaetales) from southern China, Phytotaxa 511 (3), pp. 231-247 : 242

Xylodon xinpingensis C.L. Zhao & X. Ma , sp. nov. Figs. 6 , 7

MycoBank no.: MB 838335

Holotype:— CHINA. Yunnan Province, Yuxi, Xinping County, Jinshan Primeval Forest Park , E 101°30′, N 23°56′, alt. 2500 m, on fallen angiosperm trunk, 2 January 2019, CLZhao 9174 ( SWFC!).

Etymology:— xinpingensis (Lat.) : referring to the locality (Xinping County) of the type specimens.

Basidiomata:—Annual, adnate, soft-membranaceous, without odor or taste when fresh, becoming cotton upon drying, up to 8 cm long, 4 cm wide, 500–1000 µm thick. Hymenial surface reticulate, white to cream when fresh, turn to cream upon drying. Subiculum very thin, cream. Margin sterile, 0.1 cm wide, white.

Hyphal structure:—Hyphal system monomitic, generative hyphae with clamp connections, colorless, thickwalled, branched, interwoven, 2–6 µm in diameter, IKI-, CB-; tissues unchanged in KOH.

Hymenium:—Cystidia fusiform, covered with crystal, colorless, thin-walled, 19.5–31 × 2–6 µm; basidia clavate, with 4 sterigmata and a basal clamp connection, 18.5–33 × 3–6.5 µm.

Spore s:—Basidiospores subglobose, colorless, smooth, thin-walled, with oil drops, IKI-, CB-, (4.1–)4.5–6(–6.4) × (3–)3.5–5 µm, L = 5.15 µm, W = 4.21 µm, Q = 1.23 (n = 60/2). Holytype: (4.8–)5–6.4 × (3.4–)3.5–5(5.1–) µm, L = 5.4 µm, W = 4.43 µm, Q = 1.23 (n = 30/1).

Ecology and distribution:—Lignicolous, causing a white rot. Found in China.

Additional specimen (paratype) examined:— CHINA, Yunnan Province, Yuxi, Xinping County, Jinshan Primeval Forest Park , E 101°30′, N 23°56′, alt. 2500 m, on fallen angiosperm trunk, 2 January 2019, CLZhao 9125 ( SWFC!) .

Figures

FIGURE 6. Basidiomata of Xylodon xinpingensis (holotype). Bars: A—2 cm; B—1 mm.

FIGURE 7. Xylodon xinpingensis (holotype), microscopic structures: A: Basidiospores. B: Basidia and basidioles. C: Cystida. D: A section of hymenium. E: A section of subiculum. Bars: A—5 µm; B–E—10 µm.