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

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

( Figs. 2b View FIGURE 2 , 4 View FIGURE 4 )

MycoBank no.: MB 808040

Differs from other Ceriporiopsis species by resupinate to effused-reflexed basidiocarps with greyish brown to reddish brown pore surface, generative hyphae encrusted with crystals, long-clavate basidia, ellipsoid basidiospores, 4–4.5 × 3–3.3 µm.

Type.— CHINA. Zhejiang Prov.: Taishun County, Wuyanling Nature Reserve , alt. 1200 m, on fallen angiosperm trunk, 22 August 2011, Cui 10222 (holotype, BJFC!) .

Etymology.— semisupina (Lat.) referring to partly effused basidiocarps.

Basidiocarps. —Annual, resupinate to effused-reflexed, adnate, without odor or taste when fresh, becoming tough upon drying, when resupinate up to 6 cm long, 4 cm wide, 3 mm thick at centre. Pilei usually semicular to fan-shaped, often imbricate, projecting up to 1.5 cm, 0.6 cm wide, and 2 mm thick at base. Pileal surface buff to buff-yellow, glabrous; margin obtuse. Pore surface olivaceous-buff to greyish brown when fresh, greyish brown to reddish brown upon drying; pores round to angular, 6–7 per mm; dissepiments thin, entire to lacerate. Sterile margin brown, up to 1 mm wide. Subiculum buff, up to 0.5 mm thick. Tubes concolorous with pore surface, tough, up to 2.5 mm long.

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

Subiculum. —Generative hyphae hyaline, thick-walled, unbranched, interwoven, 4.5–7 µm in diameter, occasionally encrusted with crystals.

Tubes. —Generative hyphae hyaline, thick-walled, unbranched, subparallel along tubes, 3–5 µm in diameter, frequently encrusted with crystals. Cystidia absent, but fusoid to ventricose cystidioles present, hyaline, thinwalled, 17–19.5 × 5–6.5 µm; basidia long-clavate, with four sterigmata and a basal clamp connection, 26–32 × 5.5–8 µm; basidioles dominant, in shape similar to basidia, but distinctly smaller.

Spores. —Basidiospores ellipsoid, hyaline, thin-walled, smooth, distinctly tapering to the apiculus, IKI–, CB–, 4–4.5(–4.8) × 3–3.3(–3.5) µm, L = 4.25 µm, W = 3.14 µm, Q = 1.32–1.38 (n = 90/3).

Additional specimens examined. — CHINA. Zhejiang Prov.: Taishun County, Wuyanling Nature Reserve , alt. 1200 m, on dead angiosperm tree, 22 August 2011, Cui 10189 (paratype, BJFC!) ; Yunnan Prov.: Kunming, Qiongzhusi , alt. 1800 m, on angiosperm stump, 21 October 2009, Cui 7971 (paratype, BJFC!) .