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

Figs 4 , 5

Holotype.

China. Yunnan Province, Yuxi, Xinping County, Mopanshan National Forestry Park , 23 ° 56 ′ N, 101 ° 29 ′ E, altitude 2200 m a. s. l., on the trunk of Albizia julibrissin , leg. C. L. Zhao, 20 Aguest 2017, CLZhao 2522 ( SWFC).

Etymology.

Bisterigmata (Lat.) : referring to the basidia mainly with two sterigmata.

Description.

Basidiomata annual, resupinate, adnate, membranous, without odor or taste when fresh, up to 2.5 cm long, 1.5 cm wide, and 4 mm thick. Hymenial surface odontioid, cream. Sterile margin indistinct, white, rhizomorphic, up to 0.5 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, colorless, slightly thick-walled, ampullate septa frequently present in subiculum and hymenium with crystals, up to 6 µm wide, branched, interwoven, 2.5–4 µm in diameter; IKI –, CB –, tissues unchanged in KOH.

Cystidia and cystidioles are absent; basidia barrelled, slightly constricted, with two or four sterigmata and a basal clamp connection, 6.5–14.5 × 3.5–5.5 µm.

Basidiospores subglobose to broad ellipsoid, colorless, slightly thick-walled, smooth, IKI –, CB –, (2 –) 2.5–4 × 2–3.5 µm, L = 3.03 µm, W = 2.41 µm, Q = 1.23–1.28 (n = 60 / 2).

Additional specimen examined

(paratype). China. Yunnan Province, Yuxi, Xinping County, Mopanshan National Forestry Park, 23 ° 56 ′ N, 101 ° 29 ′ E, altitude 2200 m a. s. l., on the living angiosperm tree, leg. C. L. Zhao, 19 August 2018, CLZhao 7870 ( SWFC).

Figures

Figure 4. Basidiomata of Trechispora bisterigmata (holotype) A the front of the basidiomata B characteristic hymenophore. Scale bars: 1 cm (A); 1 mm (B).

Figure 5. Microscopic structures of Trechispora bisterigmata (holotype) A basidiospores B basidia and basidioles C a cross section of basidiomata. Scale bars: 5 μm (A); 10 µm (B, C).