Xylodon daweishanensis C.L. Zhao, 2023

Guan, Qian-Xin, Huang, Jing, Huang, Jian & Zhao, Chang-Lin, 2023, Five new species of Schizoporaceae (Basidiomycota, Hymenochaetales) from East Asia, MycoKeys 96, pp. 25-56 : 25

Xylodon daweishanensis C.L. Zhao sp. nov.

Figs 8 , 9

Type material.

Holotype. China. Yunnan Province, Honghe, Pingbian County, Daweishan National Nature Reserve, 22°53'26"N, 103°35'37"E, altitude 1990 m a.s.l., on angiosperm trunk, leg. C.L. Zhao, 3 August 2019, CLZhao 18357 (SWFC).

Etymology.

Daweishanensis (Lat.): referring to the locality (Daweishan) of the type specimen.

Description.

Basidiomata annual, resupinate, adnate, without odor or taste when fresh, coriaceous, up to 10 cm long, 5 cm wide, and 150 µm thick. Hymenial surface odontioid, slightly buff when fresh, and buff upon drying. Margin sterile, slightly buff, and 1 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, colorless, thin to thick-walled, frequently branched, interwoven, 1.5-4 µm in diameter, IKI-, CB-, tissues unchanged in KOH.

Cystidia of two types: (1) capitate cystidia thin-walled, smooth, slightly constricted at the neck, with a globose tip, 11-23.5 × 2.5-5 µm; (2) asterocystidia thin-walled, with the apical part encrusted, 11-26.5 × 2.5-4.5 µm; basidia clavate to subcylindrical, constricted, somewhat sinuous, with four sterigmata and a basal clamp connection, 11-15.5 × 2.5-4 µm.

Basidiospores broad ellipsoid to subglobose, colorless, thin-walled, smooth, with oil drops, IKI-, CB-, 3-4 × 2.5-3.5(-4) µm, L = 3.51 µm, W = 3.14 µm, Q = 1.09-1.15 (n = 150/5).

Additional specimens examined

(paratypes). China. Yunnan Province, Honghe, Pingbian County, Daweishan National Nature Reserve , 22°53'26"N, 103°35'37"E, altitude 1990 m a.s.l., on angiosperm trunk, leg. C.L. Zhao, 3 August 2019, CLZhao 18425, CLZhao 18446, CLZhao 18458, and CLZhao 18492 (SWFC) .

Figures

Figure 8. Basidiomata of Xylodon daweishanensis (holotype). Scale bars: 2 cm (A); 1 mm (B).

Figure 9. Microscopic structures of Xylodon daweishanensis (holotype) A basidiospores B basidia and basidioles C capitate cystidia D asterocystidia E a section of hymenium. Scale bars: 5 µm (A); 10 µm (B-E).