Cyanosporus tabuliformis Y. C. Dai, Chao G. Wang, Yuan Yuan & Ghobad-Nejhad, 2024

Wang, Chao-Ge, Liu, Shun, Ghobad-Nejhad, Masoomeh, Liu, Hong-Gao, Dai, Yu-Cheng & Yuan, Yuan, 2024, Three new species of Cyanosporus (Polyporales, Basidiomycota) from China, MycoKeys 107, pp. 249-272 : 249-272

Cyanosporus tabuliformis Y. C. Dai, Chao G. Wang, Yuan Yuan & Ghobad-Nejhad sp. nov.

Figs 6 , 7

Holotype.

China. • Shanxi Province: Changzhi, Qinyuan County, Taiyueshan Forest Park , 31 Aug. 2023, on fallen branch of Pinus tabuliformis , Dai 26063 ( BJFC 043612 , Genbank: ITS PP 479788 , LSU PP 479810 , mtSSU PP 510203 , nrSSU PP 488295 , RPB 1 PP 526265 , RPB 2 PP 526274 , TEF 1 PP 526279 ).

Etymology.

In reference to the specific epithet of the substrate, Pinus tabuliformis in which this species was found.

Diagnosis.

Cyanosporus tabuliformis is characterized by a pileate basidiomata with cream, buff to grayish blue and hirsute azonate pileal surface when fresh, angular pores, 4–5 per mm, fusoid cystidioles, and cylindrical to allantoid basidiospores, 4.3–5.5 × 1. 5–2 μm.

Basidiomata annual, pileate, soft and without odor or taste when fresh, becoming more or less fragile to corky upon drying. Pileus flabelliform, projecting up to 1.5 cm, 3.5 cm wide and 5 mm thick at the base. Pileal surface cream to buff at the base, grayish blue at the margin when fresh, becoming olivaceous buff to ash gray upon drying, hirsute, azonate when dry; margin blunt. Hymenophore poroid, white to sulphur yellow when fresh, unchanged when bruised, becoming cream, pale cinnamon buff to pale mouse gray upon drying; sterile margin white when fresh, cream to buff when dry, up to 0.2 mm wide; pores angular to irregular, 4–5 per mm, with thin dissepiments, becoming lacerate. Context white, soft corky, up to 2 mm thick. Tubes concolorous with pore surface, fragile to soft corky when dry, up to 3 mm long.

Hyphal system monomitic, hyphae clamped, hyaline, slightly thick-walled with a wide lumen, in the context frequently branched, straight, distinctly interwoven, 3–4 µm in diam; in the tubes rarely branched, more or less flexuous, subparallel along the tubes, agglutinated, 2.8–3.5 µm in diam.

Cystidia absent, but cystidioles fusoid present, 10–12 × 4 µm.

Basidia clavate, 13–16 × 4.5–5 µm, with basal clamp and four sterigmata.

Basidiospores cylindrical to allantoid, 4.3–5.5 × 1. 5–2 μm, L = 4.8 µm, W = 1.9 µm, Q = 2.6 (n = 60 / 2), hyaline, thin-walled, sometimes with one or two small guttules, IKI -, CB -.

Type of rot.

Brown rot.

Additional specimen examined.

China. • Shanxi: Changzhi, Qinyuan County, Taiyueshan Forest Park , 31 Aug. 2023, on fallen branch of Pinus tabuliformis , Dai 26066 ( BJFC 043615 , Genbank: ITS PP 479789 , LSU PP 479811 , mtSSU PP 510204 , nrSSU PP 488296 , RPB 1 PP 526266 , TEF 1 PP 526280 ) .

Figures

Figure 6. Basidiomata of Cyanosporus tabuliformis (Dai 26063, holotype). Scale bar: 1 cm.

Figure 7. Cyanosporus tabuliformis (Dai 26063, holotype) A basidiospores B basidia and basidioles C cystidioles D hyphae from context E hyphae from trama. Scale bars: 5 µm (A); 10 µm (B-E).