Sistotrema sinense Q. Zhou & C. L. Zhao, 2025

Zhou, Qian, Qian, Chengbin, Zhang, Chuyun, Su, Qidong, Li, Yiliang, Zhang, Shihui, Mu, Nian, Xu, Taimin, Zhou, Hongmin & Zhao, Changlin, 2025, Morphology and multigene phylogeny reveals five new species of Hydnaceae (Cantharellales, Basidiomycota) from China, MycoKeys 119, pp. 67-94 : 67-94

Sistotrema sinense Q. Zhou & C. L. Zhao sp. nov.

Figs 15 , 16 , 17

Holotype.

China • Yunnan Province: Dali, Weishan County, Qinghua Town , GPS coordinates: 25°01′N, 100°22′E, altitude: 2071.6 m asl., on the fallen branch of angiosperm, leg. C. L. Zhao, 18 October 2022, CLZhao 24876 ( SWFC).

Etymology.

sinense (Lat.): refers to the type locality ( China).

Description.

Basidiomata annual, resupinate, adnate, soft coriaceous when fresh, becoming coriaceous upon drying, without odor or taste when fresh, up to 11 cm long, 2.5 cm wide, 50–100 µm thick. Hymenial surface smooth, white when fresh, turning to white to incanus upon drying. Sterile margin thin, white, thinning out, up to 1 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, often and characteristically with oil content, colorless, slightly thick-walled, frequently branched, interwoven, 2–4 μm in diameter; IKI –, CB –, tissues unchanged in KOH.

Cystidia and cystidioles absent. Basidia suburniform to urniform, slightly thick-walled, with 4 sterigmata and a basal clamp connection, 8–13.5 × 3–5 μm; basidioles abundant, in shape similar to basidia, but slightly smaller.

Basidiospores suballantoid to allantoid, colorless, thin-walled, smooth, IKI –, CB –, 3–4.5 (– 5) × (1 –) 1.5–2.5 μm L = 3.8 µm, W = 1.72 µm, Q = 2.21 μm (n = 30 / 1).

Figures

Figure 15. Basidiomata of Sistotrema sinense (holotype). Scale bars: 1 cm (A); 1 mm (B).

Figure 16. Microscopic structures of Sistotrema sinense (holotype): basidiospores (A), basidia and basidioles (B), a section of hymenium (C). Scale bars: 5 µm (A); 10 µm (B, C).

Figure 17. Microscopic structures of Sistotrema sinense (holotype): basidiospores (A), a section of hymenium (B). Scale bars: 10 µm (A, B).