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.