Lyomyces cremeus 2020

Lyomyces cremeus C.L. Zhao 2020

MycoBank No: 834037

Holotype: China. Yunnan Province: Jingdong County, Taizhong Town, Ailaoshan Ecological Station, on fallen branch of angiosperm, 23 August 2018, CLZhao 8295 (SWFC).

Morphological description

Basidiomata. Annual, resupinate, ceraceous when fresh, becoming membranaceous upon drying, up to 13 cm long and 5 cm wide, 50–100 µm thick. Hymenial surface smooth, pale cream when fresh, turn cream upon drying. Margin narrow, white to cream.

Hyphal system. Monomitic; generative hyphae with clamp connections, hyaline, thick-walled, branched, 3–5 µm in diameter, IKI–, cyanophilous; tissues unchanged in KOH. Numerous crystals present among hyphae.

Hymenium. Two kinds of cystidia: 1) capitate, hyaline, thin-walled, 20–40 × 3–5 µm, smooth or slightly encrusted; 2) tapering, hyaline, thin-walled, 18–35 × 3–4.5 µm, smooth or slightly encrusted; cystidioles present, hyaline, thin-walled, 15– 20 × 2.5–4 µm. Basidia clavate, with four sterigmata and a basal clamp connection, 9–18.5 × 3–6 µm.

Spores. Basidiospores ellipsoid, hyaline, thin-walled to slightly thick-walled, smooth, IKI–, cyanophilous, guttulate, 4.5–5.6(–5.8) × 3.3–4.3(–4.5) µm, L = 5.01 µm, W = 3.94 µm, Q = 1.25–1.3 (n = 90/3).

Habitat: on fallen branch of angiosperm.

Distribution: China.

GenBank Accession:ITS: MN945972

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 cremeus (holotype). Scale bars: 1 cm (A); 5 mm (B).