Pseudohydnum brunneiceps Y.L. Chen, M.S. Su & L.P. Zhang, 2020

Chen, Yan-Liu, Su, Ming-Sheng, Zhang, Lin-Ping, Zou, Qin, Wu, Fei, Zeng, Nian-Kai & Liu, Meng, 2020, Pseudohydnum brunneiceps (Auriculariales, Basidiomycota), a new species from Central China, Phytotaxa 441 (1), pp. 87-94 : 91-92

Pseudohydnum brunneiceps Y.L. Chen, M.S. Su & L.P. Zhang , sp. nov. ( Figs. 2–3 )

MycoBank:—MB 832937.

Etymology:— “brunneiceps ” refers to the brown pileus.

Diagnosis:—Characterized by a gelatinous, and pale yellowish brown, dark reddish brown to blackish pileus, pileal surface velutinate or mastoid, conical and white spines, and globose to broadly ellipsoidal basidiospores.

Holotype:— CHINA. Jiangxi Province: Jiujiang Country, Lushan National Nature Reserve , elevation 1100 m, 26 June 2018, L.P. Zhang ( JXSB0967 ).

Paratype:— CHINA. Jiangxi Province: Jiujiang Country, Lushan National Nature Reserve , elevation 1100 m, 26 June 2018, L.P. Zhang ( JXSB0967-1 , JXSB0967-2 ) ; Fuzhou Country, Fuheyuan Nature Reserve , elevation 800 m, 09 July 2018, Y.L. Chen ( JXSB1063 ) .

Basidiomata small to medium. Pileus shell-shaped to kidney-shaped, 20–80 mm in diam, gelatinous, pileal surface velutinate or mastoid, translucent, pale yellowish-brown (5B4), dark reddish-brown (7E5–7E7) to blackish. Spines 2–5 mm long, white, conical, gelatinous. Context 1–2 mm thick, white to grayish, unchanging in color when injured, translucent, firm. Stipe lateral, 16–50 × 12–20 mm, flat-cylindrical, gelatinous, translucent, velutinate, surface concolorous to pileal surface or paler.

Basidiospores [80/4/2] (5.5–)6–8(–8.5) × (5–)5.5–7(–8) μm [Q = 1–1.33), Q m = 1.11 ± 0.08], globose to broadly ellipsoidal, smooth, yellowish brown in KOH, often germinating by repetition. Basidia 9–13 × 6–10 µm, 2-celled, occasionally 4-celled, elliptical to subglobose, thin-walled, with longitudinally cruciate-septate; sterigmata up to 25 µm long.

Habitat:—Solitary or gregarious on decaying gymnosperm wood, mainly on Cryptomeria japonica .

Distribution: — Central China (Jiangxi Province).

Figures

FIGURE 2. Basidiomata of Pseudohydnum brunneiceps (JXSB0967, holotype). Bars = 10 mm. Photos by L.P. Zhang (A) and M.S. Su (B).

FIGURE 3. Microscopic structures of Pseudohydnum brunneiceps (JXSB0967, holotype). A. Basidiospores. B. Basidiospores with germinal tubes. C. Basidia. Bars= 10 µm. Drawings by Y. L. Chen.