Inonotus castanopsidis G.J. Ren & Y.C. Dai, 2018

Ren, Guang-Juan & Dai, Yu-Cheng, 2018, Inonotus castanopsidis sp. nov. (Hymenochaetaceae, Basidiomycota) from southwestern China, Phytotaxa 338 (1), pp. 117-124 : 120-121

Inonotus castanopsidis G.J. Ren & Y.C. Dai , sp. nov. ( Figs. 3, 4 )

MycoBankno.: MB 818438

Type. — CHINA. Yunnan Province, Lincang, Linxiang District, Xiaodaohe Forest Farm, on fallen trunk of Castaneopsis, 10 July 2013, Dai 13214 (holotype, BJFC 014704).

Etymology.— Castanopsidis , refers to the host tree genus Castanopsis where the new species was found.

Fruiting body.— Basidiomata perennial, mostly resupinate, rarely effused-reflected, soft corky and without special odor or taste when fresh, woody hard upon drying, up to 15 cm long, 5 cm wide and 1.3 cm thick when resupinate. Pore surface greyish yellow to lavender when fresh, becoming buff to cinnamon-buff and glancing when dry; margin buff to pale yellow, up to 2 mm wide; pores round to angular, 5–7 per mm; dissepiments thin, entire. Context cinnamon-buff, up to 3 mm thick, a thin black line present in the context, and also present between tubes and context. Tubes clay-buff, a fairly thick context present between tube layers, and each tube up to 1 mm long.

Hyphal structure.— Hyphal system monomitic; generative hyphae simple-septate; tissues darkening but otherwise unchanged in KOH.

Context. —Generative hyphae pale yellowish to golden yellow, fairly thick-walled, occasionally branched and frequently simple-septate, loosely interwoven, 3.8–5.5 μm in diam.

Tubes. —Tramal hyphae hyaline to golden yellow or yellowish brown, thick-walled, occasionally branched, frequently simple-septate, subparallel along the tubes, 3–5 μm in diam. Hyphoid setae prominent, dark brown, distinctly thick-walled with a narrow to wide lumen and a tip, up to 200 μm long, and 7–11 μm in diam. in the widest part. Hymenial setae rare, dark brown, ventricose, thick-walled, sharp-pointed, 15–30 × 4–8 μm; basidia clavate to barrel-shaped, with four sterigmata and a simple basal septum, 10–20 × 4–6 μm; basidioles mostly pyrifom, smaller than basidia.

Spores.—Basidiospores broadly ellipsoid to subglobose, yellowish, thick-walled, smooth, IKI–, CB +, (3–)3.1– 4(–4.1) × (2.5–)2.6–3.1 μm, L = 3.69 μm, W = 2.93 μm, Q = 1.26–1.28 (n=60/2).

Additional specimen examined.— CHINA. Yunnan Province, Lincang, Linxiang District, Xiaodaohe Forest Farm, on fallen trunk of Castaneopsis, 10 July 2013, Dai 13222 (paratype, BJFC 014712).

than 0.95) analyses are labeled at the branches. The newly sequenced specimens are boldfaced.

Figures

FIGURE 4. Microscopic structures of Inonotus castanopsidis (Holotype). a. Basidiospores; b. Basidia and basidioles; c. Hymenial setae; d. Hyphoid setae; e. Hyphae from trama. f. Hyphae from context.