Trechispora pileata K. Y. Luo & C. L. Zhao, 2024

Luo, Kai-Yue, Su, Jiang-Qing & Zhao, Chang-Lin, 2024, Morphological and molecular identification for four new wood-inhabiting species of Trechispora (Basidiomycota) from China, MycoKeys 105, pp. 155-178 : 155-178

Trechispora pileata K. Y. Luo & C. L. Zhao sp. nov.

Figs 6 , 7

Holotype.

China. Yunnan Province, Pu’er, Jingdong County, Wuliangshan National Nature Reserve , 24 ° 23 ′ N, 100 ° 45 ′ E, altitude 2350 m a. s. l., on the angiosperm trunk, leg. C. L. Zhao, 6 October 2017, CLZhao 4456 ( SWFC).

Etymology.

Pileata (Lat.) : referring to the pileate basidiomata.

Description.

Basidiomata annual, with a laterally contracted base, solitary or imbricate. Pileus fan shaped, cortical to corky, up to 1.5 cm long, 1 cm wide, and 2 mm thick, yellowish to yellowish brown, the surface radially striate covered with appressed scales, azonate; the hymenophore surface odontioid, yellowish brown, up to 1 mm long. Context cream, 1 mm thick. Sterile margin indistinct, slightly buff, and 0.5 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, colorless, thick-walled, frequently branched, interwoven, hyphae in spines 2.5–4 µm in diameter, IKI –, CB –, tissues unchanged in KOH. Hyphae in context colorless, thin- to thick-walled, unbranched, interwoven, 4.5–6 µm in diameter, IKI –, CB –, tissues unchanged in KOH.

Cystidia and cystidioles absent; basidia subcylindrical, constricted, with four sterigmata and a basal clamp connection, 5–7 × 2.5–4 µm.

Basidiospores subglobose to broad ellipsoid, colorless, thin-walled, smooth, IKI –, CB –, (2.5 –) 2.8–5 (– 5.5) × (2.5 –) 3–4.7 µm, L = 4 µm, W = 3.56 µm, Q = 1.12 (n = 30 / 1).

Figures

Figure 6. Basidiomata of Trechispora pileata (holotype) A, B the front of the basidiomata C, D the back of the basidiomata. Scale bars: 0.5 cm (A); 1 mm (B); 0.5 cm (C); 1 mm (D).

Figure 7. Microscopic structures of Trechispora pileata (holotype) A basidiospores B basidia and basidioles C hyphae of context of pileus D a spine trama of basidiomata. Scale bars: 5 μm (A); 10 µm (B, C).