Ceriporiopsis alboaurantia C.L. Zhao, B.K. Cui & Y.C. Dai, 2014

Ceriporiopsis alboaurantia C.L. Zhao, B.K. Cui & Y.C. Dai View in CoL , sp. nov

( Figs. 2a View FIGURE 2 , 3 View FIGURE 3 )

MycoBank no.: MB 808039

Differs from other Ceriporiopsis species by white to cream pore surface when fresh, turning to apricot-orange to dark orange upon drying, plenty of pale-yellow to pale-orange oily substance present among hyphae, and ellipsoid, thin-walled basidiospores, 4–5 × 3–3.3 µm.

Type.— CHINA. Fujian Prov.: Wuyishan County, Longfenggu Forest Park , alt. 500 m, on fallen trunk of Cunninghamia , 27 August 2006, Cui 4136 (holotype, BJFC!) .

Etymology.— alboaurantia (Lat.) referring to the color of pore surface in fresh and dry state.

Basidiocarps. —Annual, resupinate, soft, without odor or taste when fresh, becoming tough upon drying, impregnated with resinous substance, not readily separable, up to 4.5 cm long, 2.5 cm wide, 2 mm thick at centre. Pore surface white to cream when fresh, turning to apricot-orange to dark orange with reddish tinge upon drying; pores round to angular, 2–3 per mm; dissepiments thin, entire. Sterile margin distinct, white to pale orange, up to 3 mm wide. Subiculum buff to cinnamon-buff, up to 0.5 mm thick. Tubes concolorous with pore surface, tough, up to 1.5 mm long.

Hyphal structure. —Hyphal system monomitic; generative hyphae with clamp connections, IKI–, CB–; tissues becoming vinaceous brown to black in KOH.

Subiculum. —Generative hyphae hyaline, thin-walled, occasionally branched, interwoven, 4–6 µm in diameter, occasionally encrusted with pale-yellow crystals. Pale-yellow to pale-orange oily substance is abundant among hyphae.

Tubes. —Generative hyphae hyaline, thin-walled, frequently branched, interwoven, 2.5–4.5 µm in diameter, occasionally encrusted with pale-yellow crystals. Plenty of pale-yellow to pale-orange oily substance present among hyphae. Cystidia absent, but fusoid cystidioles present, hyaline, thin-walled, 15–17 × 4.5–5 µm; basidia short-clavate, with four sterigmata and a basal clamp connection, 17–20 × 5–6 µm; basidioles dominant, in shape similar to basidia, but slightly smaller.

Spores. —Basidiospores ellipsoid, hyaline, thin-walled, smooth, usually tapering at apiculus, IKI–, CB–, 4–5(– 5.2) × 3–3.3(–3.5) µm, L = 4.36 µm, W = 3.17 µm, Q = 1.34–1.41 (n = 60/2).

Additional specimen examined. — CHINA. Fujian Prov.: Wuyishan County, Longchuan Valley , alt. 500 m, on fallen trunk of Cunninghamia , 16 October 2005, Cui 2877 (paratype, BJFC!) .