Xylodon poroides Q. Yuan & C. L. Zhao, 2024

Yuan, Qi & Zhao, Changlin, 2024, Morphology and multigene phylogeny revealed four new species of Xylodon (Schizoporaceae, Basidiomycota) from southern China, MycoKeys 107, pp. 161-187 : 161-187

Xylodon poroides Q. Yuan & C. L. Zhao sp. nov.

Figs 8 , 9

Holotype.

China. Yunnan Province, Honghe, Pingbian Country, Daweishan National Nature Reserve , GPS coordinates 22 ° 93 ' N, 103 ° 69 ' E, altitude 1800 m, on the fallen branch of angiosperm, leg. C. L. Zhao, 1 August 2019, CLZhao 17845 ( SWFC).

Etymology.

poroides (Lat.) : referring to the poroid hymenophore surface.

Description.

Basidiomata annual, resupinate, adnate, coriaceous, without odour and taste when fresh and up to 14 cm long, 4 cm wide, 200 µm thick. Hymenial surface poroid, pores angular, 4–5 per mm, cream to pink-buff when fresh, turn to flesh-pink to pink-buff upon drying. Sterile margin slightly buff and up to 1 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, colourless, thin-walled, frequently branched, 2–3 µm in diameter; IKI –, CB –, tissues unchanged in KOH.

Cystidia of two types: (1) fusoid cystidia, colourless, thin-walled, smooth, 17.5–24.5 × 2.5–3 µm, encrusted crystals; (2) capitate cystidia, colourless, thin-walled, smooth, 11.5–15.5 × 3.5–4.5 µm; basidia clavate, with 4 sterigmata and a basal clamp connection, 15.5–19 × 3.5–5.5 µm.

Basidiospores ellipsoid, colourless, thin-walled, smooth, CB –, IKI –, (3.5 –) 4–5.5 × 2.5–3.5 (– 5) µm, L = 4.82 µm, W = 2.95 µm, Q = 1.63 (n = 30 / 1).

Figures

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

Figure 9. Microscopic structures of Xylodon poroides (holotype): basidiospores (A), basidia (B), basidioles (C), fusoid cystidia (D), capitate cystidia (E), a section of hymenium (F). Scale bars: 10 µm (A); 20 µm (B – F).