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

Figs 4 , 5

Holotype.

China. Yunnan Province, Zhaotong, Zhaoyang District, Fenghuang Mountain Forest Park , GPS coordinates 27 ° 29 ' N, 103 ° 68 ' E, altitude 2872 m, on the fallen branch of angiosperm, leg. C. L. Zhao, 24 August 2022, CLZhao 23388 ( SWFC).

Etymology.

cremeoparinaceus (Lat.) : referring to the cream hymenial surface with pruinose hymenophore.

Description.

Basidiomata annual, resupinate, adnate, farinaceous, without odour or taste when fresh, up to 2.5 cm long, 1.5 cm wide, 50–80 um thick. Hymenial surface reticulate, white to cream when fresh, turning to cream upon drying. Sterile margin white, up to 1 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, colourless, thin-walled, frequently branched, interwoven, 1.5–2 µm in diameter; IKI –, CB –, tissues unchanged in KOH. Numerous crystals present amongst generative hyphae.

Cystidia capitate, colourless, thin-walled, smooth, slightly constricted at the neck, with a globose tip, 18.5–25 × 3.5–6.5 µm; basidia subclavate, with 4 sterigmata and a basal clamp connection, 13.5–17.5 × 3–3.5 µm.

Basidiospores ellipsoid, colourless, thin-walled, smooth, with one drop, cyanophilous, IKI –, 3.5–4.5 × 2.5–3.5 µm, L = 3.71 µm, W = 2.82 µm, Q = 1.31 (n = 30 / 1).

Figures

Figure 4. Basidiomata of Xylodon cremeoparinaceus (holotype). Scale bars: 1 cm (A); 2 mm (B).

Figure 5. Microscopic structures of Xylodon cremeoparinaceus (holotype): basidiospores (A), basidia (B), basidioles (C), capitate cystidia (D), a section of hymenium (E). Scale bars: 20 µm (A – E).