Lyomyces wuliangshanensis C.L. Zhao, 2020

Chen, Jun-Zhu & Zhao, Chang-Lin, 2020, Morphological and molecular identification of four new resupinate species of Lyomyces (Hymenochaetales) from southern China, MycoKeys 65, pp. 101-118 : 101

Lyomyces wuliangshanensis C.L. Zhao sp. nov. Figs 5 , 9

Holotype.

China. Yunnan Province: Puer, Jingdong County, Wuliangshan National Nature Reserve, on fallen branch of angiosperm, 5 October 2017, CLZhao 4167 (SWFC).

Etymology.

The epithet wuliangshanensis (Lat.): refers to the locality (Wuliangshan) of the type specimens.

Basidiomata.

Annual, resupinate, subcoriaceous when fresh, becoming coriaceous upon drying, up to 15 cm long and 5 cm wide, 50-150 µm thick. Hymenial surface smooth to more or less tuberculate, white to cream when fresh, turning cream to buff upon drying. Margin narrow, concolorous with hymenial surface.

Hyphal system.

Monomitic; generative hyphae with clamp connections, hyaline, thick-walled, branched, 2-3 µm in diameter, IKI-, cyanophilous; tissues unchanged in KOH. Numerous crystals present among hyphae.

Hymenium.

Two kinds of cystidia: 1) capitate, hyaline, thin-walled, 22-37 × 3-6 µm; 2) tapering, hyaline, thin-walled, 21-35 × 4-6.5 µm; fusoid cystidioles present, hyaline, thin-walled, 16-21 × 2.5-3.5 µm. Basidia clavate, hyaline, thin-walled, with four sterigmata and a basal clamp connection, 12-20 × 3-4.3 µm.

Spores.

Basidiospores ellipsoid, hyaline, slightly thick-walled, smooth, IKI-, cyanophilous, guttulate, (3.3-)3.5-5.3(-5.5) × 2.8-4(-4.2) µm, L = 4.3 µm, W = 3.56 µm, Q = 1.22-1.31 (n = 120/4).

Ecology and distribution.

Lignicolous, causing a white rot. China.

Additional specimens examined.

China. Yunnan Province: Puer, Jingdong County, Wuliangshan National Nature Reserve, on angiosperm trunk, 5 October 2017, CLZhao 4108, CLZhao 4144; on angiosperm stump, 5 October 2017, CLZhao 4206; on fallen branch of angiosperm, 6 October 2017, CLZhao 4475 (SWFC).

Figures

Figure 5. Basidiomata of Lyomyces wuliangshanensis (holotype). Scale bars: 1 cm (A); 5 mm (B).

Figure 9. Microscopic structures of Lyomyces wuliangshanensis (drawn from the holotype) A basidiospores B basidia and basidioles C cystidia D cystidioles E a cross section of basidiomata. Scale bars: 5 μm (A); 10 μm (B-E).