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

Figs 6 , 7

Holotype.

China. Yunnan Province, Puer, Laiyanghe National Forestry Park , GPS coordinates 22 ° 60 ' N, 101 ° 00 ' E, altitude 1500 m, on the fallen branch of angiosperm, leg. C. L. Zhao, 30 September 2017, CLZhao 3207 ( SWFC).

Etymology.

luteodontioides (Lat.) : referring to the flavescent hymenophore surface with odontioid hymenophore.

Description.

Basidiomata annual, resupinate, adnate, coriaceous, without odour and taste when fresh and up to 7 cm long, 4 cm wide, 100 μm thick. Hymenial surface odontioid, buff when fresh, to buff to olivaceous-buff upon drying. Sterile margin slightly buff and up to 1 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, colourless, thin-walled, branched, 2.5–3.5 µm in diameter; IKI –, CB –, tissues unchanged in KOH.

Cystidia of two types: (1) schizopapillate cystidia, colourless, thin-walled, smooth, 29.5–37 × 2.5–3.5 µm; (2) capitate cystidia, colourless, thin-walled, smooth, 38.5–44.5 × 3.5–4 µm; basidia subclavate, with 4 sterigmata and a basal clamp connection, 19.5–26 × 3.5–4 µm.

Basidiospores ellipsoid, colourless, thin-walled, smooth, CB –, IKI –, 3.5–4.5 × 2.5–3.5 µm, L = 4.07 µm, W = 2.92 µm, Q = 1.39–1.45 (n = 60 / 2).

Additional specimens examined

(paratypes). 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, 3 August 2019, CLZhao 18494 ( SWFC).

Figures

Figure 6. Basidiomata of Xylodon luteodontioides (holotype). Scale bars: 1 cm (A); 2 mm (B).

Figure 7. Microscopic structures of Xylodon luteodontioides (holotype): basidiospores (A), basidia (B), basidioles (C), schizopapillate cystidia (D), capitate cystidia (E), a section of hymenium (F). Scale bars: 20 µm (A – F).