Tenuimyces bambusicola S.L. Liu & L.W. Zhou, sp. nov.
Index Fungorum number: IF 901052; Mycobank number: MB 901052; Facesoffungi number: FoF 14806; Figs. 1, 2
Etymology – bambusicola (Lat.) referring to the growth on bamboo.
Holotype – LWZ 20200816-4a (HMAS).
Diagnosis – Characterized by cream, extremely thin basidiomes, and aculeate basidiospores.
Basidiomes annual, resupinate, effused, thin, up to 50 μm thick in section. Hymenophore smooth, white to cream when fresh, concolorous when dry, cracked. Margin thinning or indeterminate, concolorous or paler.
Hyphal system monomitic; generative hyphae with clamps, hyaline, thin-walled, 1.5–2 µm in diam; tissues darkening in KOH. Cystidioles subfusiform, rare in the hymenium, thin-walled, with a basal clamp connection, 30–50×7–15 μm. Hyphidia rare, branched or unbranched. Basidia subclavate, 4-sterigmate, with a basal clamp connection, 15–20 × 5–6 μm. Basidiospores broadly ellipsoid, hyaline, aculeate, slightly thick-walled, IKI–, CB–, 3.5–4 × 2.6–3 µm, L = 3.7 µm, W = 2.8 µm, Q = 1.3 (n=90/3).
Material examined – China, Sichuan Province, Leshan, Mabian Yi Autonomous County, Dafengding National Nature Reserve, on dead bamboo, 16 August 2020, L.W. Zhou, LWZ 20200816-4a (HMAS, Holotype), LWZ 20200816-5a (HMAS), LWZ 20200816-2b (HMAS).
GenBank numbers – LWZ 20200816-4a: ITS=OR557247, LSU = OR527273; LWZ 20200816-5a: ITS= OR557249, LSU = OR527274; LWZ 20200816-2b: ITS= OR557248, LSU=OR527275.
Notes – Tenuimyces bambusicola is characterized by white to cream basidiomes with smooth hymenophore, subfusiform cystidioles, slightly thick-walled, aculeate basidiospores, and the growth on bamboo.
Figure 1 – Basidiomes of Tenuimyces bambusicola (LWZ 20200816-4a, holotype). Scale bars: a=1 cm, b=1 mm
Figure 2 – Microscopic structures of Tenuimyces bambusicola (LWZ 20200816-4a, holotype). a A vertical section of basidiomes. b Basidia. c Cystidioles. d Basidiospores. Scale bars: 10 μm