Lyomyces zhaotongensis Q. Yuan & C. L. Zhao, 2024

Yuan, Qi, Li, Yunchao, Dai, Yunfei, Wang, Kunyan, Wang, Yixuan & Zhao, Changlin, 2024, Morphological and molecular identification for four new wood-inhabiting species of Lyomyces (Basidiomycota) from China, MycoKeys 110, pp. 67-92 : 67-92

Lyomyces zhaotongensis Q. Yuan & C. L. Zhao sp. nov.

Figs 9 , 10

Type material.

Holotype. China • Yunnan Province, Zhaotong, Wumeng Mountain National Nature Reserve , GPS coordinates 27 ° 77 ' N, 104°29'E, altitude 2900 m, on the fallen branch of angiosperm, leg. C. L. Zhao, 29 August 2023, CLZhao 32878 ( SWFC).

Etymology.

Zhaotongensis (Lat.) refers to the type locality “ Zhaotong ”.

Description.

Basidiomata annual, resupinate, adnate, farinaceous when fresh, becoming coriaceous upon drying and up to 9.5 cm long, 3 cm wide, 30–80 um thick. Hymenial surface grandinioid, cream when fresh and cream to buff upon drying. Sterile margin white to cream and up to 1 mm wide.

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

Cystidia fusoid, colourless, thin-walled, smooth, 16–20.5 × 2.5–3.5 µm. Basidia clavate, with 4 sterigmata and a basal clamp connection, 14–16.5 × 2.5–3.5 µm.

Basidiospores broadly ellipsoid, colourless, thin-walled, smooth, with oil drops, CB –, IKI –, 2.6–3.5 × 2.5–3 µm, L = 2.99 µm, W = 2.75 µm, Q = 1.08 (n = 30 / 1).

Additional specimen examined

(paratype). China • Yunnan Province, Zhaotong, Wumeng Mountain National Nature Reserve , GPS coordinates 27 ° 77 ' N, 104°29'E, altitude 2900 m, on the fallen branch of angiosperm, leg. C. L. Zhao, 10 August 2024, CLZhao 40335 ( SWFC) .

Figures

Figure 9. Basidiomata of Lyomyces zhaotongensis (holotype). Scale bars: (A) 1 cm; (B) 2 mm.

Figure 10. Microscopic structures of Lyomyces zhaotongensis (holotype): basidiospores (A), basidia (B), basidioles (C), fusoid cystidia (D), a section of hymenium (E). Scale bars: 20 µm (A – E).