Ramaria xizangensis C. L. Zhao & H. M. Zhou, 2024

Zhou, Hong-Min, Zhang, Xun-Chi, Li, Jie-Ting, Wu, Fang & Zhao, Chang-Lin, 2024, Morphological characteristics and phylogenetic analyses revealed four new wood inhabiting fungi (Agaricomycetes, Basidiomycota) in Xizang Autonomous Region, China, MycoKeys 106, pp. 201-224 : 201-224

Ramaria xizangensis C. L. Zhao & H. M. Zhou sp. nov.

Figs 11 , 12

Holotype.

China, Xizang, Linzhi, Sejila Mountain National Forest Park , 29 ° 64 ' N, 94 ° 71 ' E, elev. 3850 m, gregarious on the humus under Abies , 2 August 2023, CLZhao 31169 ( SWFC).

Etymology.

Xizangensis (Lat.) : refers to the locality ( Xizang) of the type specimens.

Diagnosis.

Differed from other species in having flesh pink basidiomata, monomitic hyphal system, generative hyphae with clamp connections, ellipsoid to cylindrical, densely warted basidiospores (9.7–11.8 × 3.9–4.9 µm).

Fruiting body.

Basidiomata solitary to gregarious, with 8 cm high × 6 cm wide at the widest point, repeat branched dichotomously in 4–5 ranks, flesh pink when fresh, become clay buff with dry; apices obtuse, orange yellow when fresh, becoming fuscous when dry. Stipe ≥ 3 cm high, compound to fasciculate in groups of 5, emerging from a common base, concolorous with the branches.

Hyphal structure.

Hyphal system monomitic, generative hyphae with clamp connections, branched, walls smooth and hyaline; basal stem with tramal hyphae 4–7 μm wide and inflated ones up to 10 μm, occasionally branched, thin-walled, parallel arranged, hyaline; tramal hyphae of branches 3–4 μm wide.

Hymenium.

Hymenium all along the basidiomata. Basidia clavate, in a dense palisade, with 4 sterigmata and a basal clamp connection. Basidioles elongated clavate, smooth, hyaline, contents homogeneous, 23.5–34 × 6–7 μm.

Spores.

Basidiospores ellipsoid to cylindrical, densely warted, with 1–2 several guttulae, IKI –, CB –, 9.7–11.8 (– 12.5) × (3.8 –) 3.9–4.9 (– 5.1) µm, L = 10.69 µm, W = 4.29 µm, Q = 2.49 (n = 30 / 1).

Additional specimens examined

( paratypes). China, Xizang, Linzhi, Sejila Mountain National Forest Park , 29 ° 67 ' N, 94 ° 74 ' E, elev. 3850 m, gregarious on the humus under Abies , 2 August 2023, CLZhao 31180 ( SWFC) ; on ground in forest of Abies , 2 August 2023, CLZhao 31204 ( SWFC) .

Figures

Figure 11. Basidiomata of Ramaria xizangensis (holotype, CLZhao 31169). Scale bars: 1 cm (A, B).

Figure 12. Microscopic structures of Ramaria xizangensis (CLZhao 31169, holotype) a basidiospores b basidia c a section of hymenium. Scale bars: 5 μm (a); 10 μm (b, c).