Tomentella wumenshanensis X. J. Zhang & C. L. Zhao, 2024

Zhang, Xiaojie, Shi, Fulei, Yang, Ke & Zhao, Changlin, 2024, The diversity and taxonomy of Tomentella (Thelephoraceae, Thelephorales) with descriptions of four new species from Southwestern China, MycoKeys 109, pp. 1-29 : 1-29

Tomentella wumenshanensis X. J. Zhang & C. L. Zhao sp. nov.

Figs 7 , 8

Holotype.

China • Yunnan Province, Zhaotong, Wumengshan National Nature Reserve , 27 ° 33 ' N, 103 ° 72 ' E, altitude 2300 m, on the fallen branch of angiosperm, leg. C. L. Zhao, 21 September 2023, CLZhao 33775 ( SWFC).

Etymology.

Wumenshanensis (Lat.): refers to the type locality “ Wumengshan National Nature Reserve ”.

Description.

Basidiomata annual, resupinate, membranaceous, without odour or taste when fresh, up to 15 cm long, 2 cm wide, 0.1–0.2 mm thick. Hymenial surface smooth, yellowish-brown to orange brown when dry. Sterile margin narrow, yellowish-brown, up to 1 mm.

Hyphal system: Monomitic; generative hyphae with clamp connections, yellowish-brown, slightly thick-walled, moderately branched, interwoven, 5–8 µm in diameter, IKI –, CB –; brown-black to black in KOH.

Hymenium: Cystidia and cystidioles absent. Basidia barrel-shaped to slightly clavate, with 4 sterigmata and a basal clamp connection, 25–28 × 5.5–8.5 µm; basidioles dominant, slightly smaller than basidia.

Spores: Basidiospores subglobose to globose, nodulose to verrucose, yellowish-brown, thick-walled, IKI –, CB –, (7 –) 7.5–9.5 (– 10) × 6–8 (– 8.5) µm, L = 8.3 µm, W = 7 µm, Q = 1.19 (n = 30 / 1).

Figures

Figure 7. Tomentella wumenshanensis (holotype, CLZhao 33775): basidiomata on the substrate (A), macroscopic characteristics of hymenophore (B). Scale bars: 1 cm (A); 1 mm (B).

Figure 8. Microscopic structures of Tomentella wumenshanensis (holotype, CLZhao 33775): basidiospores (A), basidia and basidioles (B), a section of the hymenium (C). Scale bars: 10 µm (A – C).