Atraporiella yunnanensis C.L. Zhao, 2017

Wu, Zi-Qiang, Shen, Shan, Luo, Kai-Yue, Wang, Zheng-Hui & Zhao, Chang-Lin, 2017, Morphological and molecular identification of a new species of Atraporiella (Polyporales, Basidiomycota) in China, Phytotaxa 332 (1), pp. 31-40 : 36-37

Atraporiella yunnanensis C.L. Zhao , sp. nov. ( Figs. 2 , 3 )

MycoBank no.: MB 823187

Type.— China. Yunnan Province, Jinghong, Sanchahe Nature Reserve, alt. 552 m, on fallen angiosperm trunk, 15 November 2016, CLZhao 605 (holotype, SWFC!).

Etymology.— Yunnanensis (Lat.) : referring to the locality (Yunnan Province) of the type specimens.

Basidiomata. —Annual, resupinate, easy to separate from substrate, soft and slightly waxy when fresh, without odor or taste when fresh, becoming brittle and contracting up on drying, up to 2 cm long, 1 cm wide, 2 mm thick at centre. Pore surface white, very rapidly stained dark brown to black when bruised when fresh, turn to cream upon drying; pores angular, 3–4 per mm; dissepiments thin, lacerate. Sterile margin distinct, with raised loosened disc, white, up to 2 mm wide. Subiculum thin to almost invisible, pale brown, cottony, up to 0.2 mm thick. Tubes concolorous with pore surface, soft corky to fragile, up to 1.8 mm long.

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

Subiculum. —Generative hyphae hyaline to pale brown, thin-walled, unbranched, interwoven, 2.5–4.5 μm in diameter.

Tubes. —Generative hyphae hyaline to pale brown, thin-walled, unbranched, interwoven, 3–6 μm in diameter. Cystidia and cystidioles absent; basidia clavate, with four sterigmata and a basal clamp connection, 9–13 × 3.5–5.5 μm; basidioles dominant, pyriform.

Spores. —Basidiospores slightly allantoid, hyaline, thin-walled, smooth, IKI–, CB –, (2–)2.2–3(–3.2) × 0.8–1.5 μm, L = 2.7 μm, W = 1.2 μm, Q = 1.84–2.52 (n = 90/3).

Additional specimens examined.— China. Yunnan Province, Jinghong, Sanchahe Nature Reserve, alt. 552 m, on fallen angiosperm trunk, 15 November 2016, CLZhao 603, 604 (paratypes, SWFC!).

Figures

FIGURE 2. Basidiomata of Atraporiella yunnanensis (holotype). Scale bars: a—3 mm; b—2 mm.

FIGURE 3. Microscopic structures of Atraporiella yunnanensis (drawn from the holotype). a basidiospores. b basidia and basidioles. c hyphae from trama. d hyphae from subiculum. Bars: a—5 μm; b–d—10 μm.