Xylodon puerensis 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 puerensis C.L. Zhao sp. nov.

Figs 12 , 13

Type material.

Holotype. China. Yunnan Province, Puer, Zhenyuan County, Heping Town, Jinshan Virgin Forest Park, 23°56'21"N, 101°25'32"E, altitude 2240 m a.s.l., on fallen angiosperm branch, leg. C.L. Zhao, 21 August 2018, CLZhao 8142 (SWFC).

Etymology.

Puerensis (Lat.): referring to the locality (Yunnan Province) of the type specimen.

Description.

Basidiomata annual, resupinate, adnate, coriaceous, without odor or taste when fresh, up to 12 cm long, 5 cm wide, and 200 µm thick. Hymenial surface poroid, pores angular or slightly daedaleoid, 3-6 per mm, and cream when fresh, buff on drying. Sterile margin slightly buff, and up to 1 mm wide.

Hyphal system monomitic, generative hyphae with clamps, colorless, thick-walled, frequently branched, interwoven, 2.5-4.5 µm in diameter; IKI-, CB-, tissues unchanged in KOH.

Cystidia of four types: (1) paraphysoid cystidia colorless, smooth, 12-20.5 × 3-5 µm; (2) astrocystidia colorless, thin-walled, smooth, 9-11 × 3.5-5.5 µm; (3) capitate cystidia, colorless, thin-walled, smooth, embedded, 22-29.5 × 6.5-12 µm; (4) septocystidia, thin-walled, smooth, with the apical part encrusted, 32-51 × 3.5-6 µm; basidia clavate to subcylindrical, slightly sinuous or distinctly sinuous, with four sterigmata and a basal clamp connection, 14.5-20 × 5-7 µm.

Basidiospores ellipsoid to broad ellipsoid, colorless, thin-walled, smooth, with oil drops, IKI-, CB-, (5.5-)6-7 × 4.5-5.5 µm, L = 6.41 µm, W = 5.01 µm, Q = 1.28 (n = 30/1).

Additional specimen examined

(paratype). China. Yunnan Province, Puer, Jingdong County, Taizhong Town, Ailaoshan Ecological Station, 24°29'41"N, 100°56'32"E, altitude 1930 m a.s.l., on angiosperm trunk, leg. C.L. Zhao, 24 August 2018, CLZhao 8639 (SWFC).

Figures

Figure 12. Basidiomata of Xylodon puerensis (holotype). Scale bars: 2 cm (A); 1 mm (B).

Figure 13. Microscopic structures of Xylodon puerensis (holotype) A basidiospores B basidia and basidioles C paraphysoid cystidia D astrocystidium E capitate cystidia F septocystidium cystidia G a section of hymenium. Scale bars: 5 µm (A); 10 µm (B-G).