Lyomyces macrosporus 2020

Lyomyces macrosporus C.L. Zhao2020

MycoBank No: 834038

Holotype: China. Yunnan Province: Puer, Jingdong County, Taizhong Town, Ailaoshan National Nature Reserve, on fallen branch of angiosperm, 24 August 2018, CLZhao 8605 (holotype in SWFC).

Morphological description

Basidiomata. Annual, resupinate, subceraceous when fresh, becoming pruinose upon drying, up to 22 cm long and 3 cm wide, 100–200 µm thick. Hymenial surface reticulate, cream when fresh, turning cream to buff upon drying. Margin narrow, white to buff.

Hyphal system. Monomitic; generative hyphae with clamp connections, hyaline, thick-walled, branched, 2.5–4 µm in diameter, IKI–, cyanophilous; tissues unchanged in KOH. Numerous crystals present among hyphae.

Hymenium. Three kinds of cystidia: 1) capitate, hyaline, thin-walled, 19–35 × 3–7 µm; 2) tapering, hyaline, thin-walled, 13–20 × 2.5–4 µm; 3) moniliform, hyaline, thin-walled, 15–22 × 4.5–6 µm; fusoid cystidioles present, hyaline, thin-walled, 15–20 × 2.5–4 µm. Basidia subclavate to clavate, constricted, hyaline, thin-walled, with four sterigmata and a basal clamp connection, 22.2–38 × 4.5–7 µm.

Spores. Basidiospores ellipsoid, hyaline, slightly thick-walled, smooth, IKI–, cyanophilous, guttulate, (6.4–)6.7–8.9(–9.1) × 4.4–5.4(–5.7) µm, L = 7.84 µm, W = 4.93 µm, Q = 1.48–1.8 (n = 120/4).

Habitat: on fallen branch of angiosperm.

Distribution: China.

GenBank Accession: ITS:MN945975

Notes: 

Reference: Chen J-Z, Zhao C-L (2020) Morphological and molecular identification of four new resupinate species of Lyomyces (Hymenochaetales) from southern China. MycoKeys 65: 101–118. https://doi.org/10.3897/ mycokeys.65.48660

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