Fibroporia albicans B.K. Cui & Yuan Y. Chen, 2015

Chen, Yuan-Yuan, Li, Hai-Jiao & Cui, Bao-Kai, 2015, Molecular phylogeny and taxonomy of Fibroporia (Basidiomycota) in China, Phytotaxa 203 (1), pp. 47-54 : 51-52

Fibroporia albicans B.K. Cui & Yuan Y. Chen , sp. nov. ( Figs. 2 a-b, 3)

MycoBank no.: MB808337

Basidiocarps resupinate, pore surface white to cream-colored when fresh, becoming cream to cream-buff upon drying, pores small (6–8 per mm), rhizomorphs white to cream, hyphal system dimitic with clamped generative hyphae, cystidioles fusoid, and basidiospores oblong to ellipsoid.

Type.— CHINA. Jiangxi Province, Jinggangshan County, Jinggangshan Nature Reserve, on rotten stump of Pinus , 23 September 2008, Dai 10595 (Holotype, BJFC).

Etymology.— albicans (Lat.) : referring to the cream-white color of basidiocarps.

Basidiocarps.—Annual, resupinate, easily separable from substratum, soft corky, without odor or taste when fresh, corky upon drying, up to 40 cm long, 15 cm wide, 2.5 mm thick at centre; margin finely fimbriate, cream to buff. Pore surface white to cream when fresh, becoming cream to cream-buff upon drying. Pores angular, 6–8 per mm; dissepiments thin, entire to slightly lacerate. Subiculum white to cream, up to 0.5 mm thick. Tubes cream to buff, corky, up to 2 mm thick. Rhizomorphs present, white to cream, penetrating deep into the substrate.

Hyphal structure.—Hyphal system dimitic; generative hyphae with clamp connections; skeletal hyphae IKI–, CB–; tissues unchanged in KOH.

Subiculum.—Generative hyphae frequent, hyaline, thin to thick-walled, occasionally branched, 2–5 μm in diam.; skeletal hyphae dominant, hyaline, thick-walled, occasionally branched, interwoven, 2–6 μm in diam.

Tubes.—Generative hyphae frequent, hyaline, thin to slightly thick-walled, occasionally branched, 2–4.5 μm in diam.; skeletal hyphae dominant, hyaline, thick-walled, occasionally branched, interwoven, 2–5 μm in diam. Cystidia absent, fusoid cystidioles present, hyaline, thin-walled, 10–16 × 3–5.5 μm. Basidia barrel-shaped, with four sterigmata and a basal clamp connection, 10–17 × 5–7 μm; basidioles similar to basidia in shape, but slightly smaller.

Spores.—Basidiospores oblong to ellipsoid, hyaline, thin to slightly thick-walled, smooth, IKI–, CB–, (3.5–)4– 5.2(–6) × 3–3.8(–4) μm, L = 4.49 μm, W = 3.25 μm, Q = 1.35–1.44 (n = 120/4).

Type of rot.— Brown rot.

Other specimens examined.— CHINA. Xizang Autonomous Region (Tibet), Bomi County, Yupu, on stump of Pinus , 19 September 2010, Cui 9464, 9495 & 9504 (BJFC).