Spodocybe rugosiceps Z.M. He & Zhu. L. Yang, Mycokeys, 2021

Ma, Jing, Zhang, Guo-Li, Zhang, Wen-Hao, Pu, Yun-Ju & Tang, Li-Ping, 2024, A contribution to the knowledge of the genus Spodocybe (Hygrophoraceae, Agaricales) in China, Phytotaxa 652 (1), pp. 47-58 : 54

Spodocybe rugosiceps Z.M. He & Zhu. L. Yang, Mycokeys 79: 139, 2021 ( Figs. 2h , 3e )

Chinese name: 皱ȅ灰ȅ杯伞

The detailed description refers to He & Yang (2021).

Habit and habitat:—Usually scattered to gregarious or caespitose, on the soil of coniferous forests dominated by P. yunnensis , known from the subtropical zone of Yunnan, China; July to September.

Distribution:— CHINA: Yunnan province (Kunming city, Yulong and Yunlong prefecture) at elevations ranging from 1900−2600 m.

Material examined:— CHINA. Yunnan province: Kunming City (AEDZ市), Fangwang Tree Farm (Ẁffi林场), 25°38.24'N, 102°52.24'E, elev. 2262 m, 22 September 2011, Zhu-Liang Yang 5586 (KUN-HKAS 71071, GenBank Acc. No.: nrLSU = MW763011, ITS = MW762886).

Comments:—According to the previous description ( He & Yang 2021), S. rugosiceps is the type species of the genus Spodocybe which is distinctive by its small basidiomata (pileus 0.5−2 cm diam.), grey-brown to grey-black finely tomentose pileus, elongate basidiospores (5–6 × 3–3.5 μm, Q = 1.55–1.95, Q m = 1.73 ± 0.14), 4-spored basidia, and growing in coniferous forests. The epithet “rugosiceps ” refers to its rugose pileus. Based on our field observation, the rugose pileus might be a valid character at only young period, however, this character is insignificant when mature. This species is known to occur in southwest China.

Figures

FIGURE 2. Basidioma of four taxa in Spodocybe from southwest China. a, b S. alpina (MHKMU Zhang-642, holotype); c, d S. bispora (c MHKMU Huang-093, d MHKMU Huang-078); e–g S. microspora (e–g MHKMU Mu-127, holotype); h S. rugosiceps (HKAS 69830) (a, b photos by W.H. Zhang; c, d photos by H.Y. Huang; e–g photos by M. Mu; h photos by L.P. Tang).

FIGURE 3. Basidiospores of four taxa in Spodocybe from southwest China. a S. alpina (MHKMU Zhang-642, holotype); b, c S. bispora (b HKAS 73310, holotype; c MHKMU Huang-093, MHKMU Tang-3049); d S. microspora (MHKMU Mu-127, holotype; MHKMU Pu- 008, MHKMU Niu-080); e S. rugosiceps (HKAS 71071); Bars: a–e = 20 μm. (a–e photos by J. Ma).