Lyomyces yunnanensis C.L. Zhao, 2023

Guan, Qian-Xin, Huang, Jing, Huang, Jian & Zhao, Chang-Lin, 2023, Five new species of Schizoporaceae (Basidiomycota, Hymenochaetales) from East Asia, MycoKeys 96, pp. 25-56 : 25

Lyomyces yunnanensis C.L. Zhao sp. nov.

Figs 6 , 7

Type material.

Holotype. China. Yunnan Province, Dali, Nanjian County, Lingbaoshan, 24°46'2"N, 100°30'26"E, altitude 2350 m a.s.l., on fallen angiosperm branch, leg. C.L. Zhao, 9 January 2019, CLZhao 10041 (SWFC).

Etymology.

Yunnanensis (Lat.): referring to the locality (Yunnan Province) of the type specimen.

Description.

Basidiomata annual, resupinate, adnate, coriaceous when fresh, becoming farinaceous upon drying, without odor or taste when fresh, up to 15 cm long, 2.5 cm wide, and 150 µm thick. Hymenial surface grandinioid, cream to buff when fresh, and buff upon drying. Sterile margin indistinct, buff, and up to 1 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, colorless, thick-walled, frequently branched, interwoven, 2.5-3 µm in diameter; IKI-, CB-, tissues unchanged in KOH. Numerous crystals present among hyphae.

Cystidia of two types: (1) fusiform, tapering, colorless, thin-walled, 18-39 × 4-6 µm; (2) capitate cystidia, colorless, thin-walled, 16-23.5 × 3-5 µm; fusoid cystidioles present, colorless, thin-walled, 18-25 × 3-6 µm; basidia clavate, slightly sinuous, with four sterigmata and a basal clamp connection, 16.5-27 × 4-5.5 µm.

Basidiospores ellipsoid, colorless, thin-walled, smooth, IKI-, CB-, (4.5-)5-7 × 3-4.5 µm, L = 5.72 µm, W = 3.6 µm, Q = 1.54-1.65 (n = 90/3).

Additional specimens examined

(paratypes). China. Yunnan Province, Yuxi, Xinping County, Mopanshan National Forestry Park , 23°55'48"N, 101°59'22"E, altitude 2150 m a.s.l., on fallen angiosperm branch, leg. C.L. Zhao, 19 August 2017, CLZhao 2463 (SWFC); Puer, Jingdong County , the Forest of Pineapple , 24°21'32"N, 100°48'12"E, altitude 2110 m a.s.l., on fallen angiosperm branch, leg. C.L. Zhao, 4 January 2019, CLZhao 9375 (SWFC) .

Figures

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

Figure 7. Microscopic structures of Lyomyces yunnanensis (holotype) A basidiospores B basidia and basidioles C tapering cystidia D capitate cystidia E fusoid cystidioles F a section of hymenium. Scale bars: 5 µm (A); 10 µm (B-F).