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

Figs 7 , 8

Type material.

Holotype. China • Yunnan Province, Zhaotong, Daguan County, Wumeng Mountain National Nature Reserve , GPS coordinates 27 ° 72 ' N, 103 ° 92 ' E, altitude 1424 m, on a fallen branch of angiosperm, leg. C. L. Zhao, 3 July 2023, CLZhao 29374 ( SWFC).

Etymology.

Wumengshanensis (Lat.) refers to the type locality “ Wumeng Mountain ”.

Description.

Basidiomata annual, resupinate, adnate, coriaceous when fresh, becoming farinaceous upon drying, without odour and taste when fresh and up to 5 cm long, 2 cm wide, 150 µm thick. Hymenial surface grandinioid, white when fresh, to cream upon drying. Sterile margin white and up to 1 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, colourless, thick-walled, branched, 3–4 µm in diameter; IKI –, CB –, tissues unchanged in KOH. Numerous crystals present amongst generative hyphae.

Cystidia capitate, colourless, thin-walled, smooth, 24.5–29 × 3–4 µm; basidia subclavate to barrelled, colourless, with 4 sterigmata and a basal clamp connection, 11.5–14 × 5.5–6.5 µm.

Basidiospores ellipsoid to broad ellipsoid, colourless, thin-walled, smooth, with one oil drop, CB –, IKI –, 4–6 × 3–5 µm, L = 5.4 µm, W = 4.2 µm, Q = 1.28–1.32 (n = 120 / 4).

Additional specimen examined

(paratype). China • Yunnan Province, Zhaotong, Wumeng Mountain National Nature Reserve , 27 ° 72 ' N, 103 ° 92 ' E, altitude 1424 m, on a fallen branch of angiosperm, leg. C. L. Zhao, 29 August 2023, CLZhao 31486, CLZhao 32705, CLZhao 32736, CLZhao 32800, CLZhao 32869, CLZhao 32915, CLZhao 32933 ( SWFC) .

Figures

Figure 7. Basidiomata of Lyomyces wumengshanensis (holotype). Scale bars: 1 cm (A); 2 mm (B).

Figure 8. Microscopic structures of Lyomyces wumengshanensis (holotype): basidiospores (A), basidia (B), basidioles (C), capitate cystidia (D), a section of hymenium (E). Scale bars: 10 µm (A – E).