Calvatia phlebioides X. Yang & C. L. Zhao, 2025

Yang, Xin, Duan, Songjing, Li, Mei, Li, Dongxu, Yang, Rongcong, Zhang, Shihui, Xu, Taimin, Li, Wen, Zhou, Hongmin & Zhao, Changlin, 2025, A new genus and three new species of Lycoperdaceae (Agaricales) from Southern China revealed by molecular phylogeny and taxonomy, MycoKeys 118, pp. 147-177 : 147-177

Calvatia phlebioides X. Yang & C. L. Zhao sp. nov.

Figs 4 , 5

Holotype.

China • Yunnan Province, Zhaotong, Yiliang County, Wumengshan National Nature Reserve , 27°47'19.69"N, 104°15'4.78"E, elev. 2300 m, on the ground, 19 September 2023, CLZhao 33216 ( SWFC).

Etymology.

phlebioides (Lat.) refers to basidiomes that have a phlebioid surface of the stem base.

Description.

Fruiting body: Basidiomes broadly obpyriform to turbinate, 30–50 mm in diameter, 45–65 mm in height, slightly tapering at the base, and developing a round base. Peridium layered: Exoperidium brownish to dark brownish when mature and grayish-brown when dry, breaking up into thin, irregular-shaped, flaky patches, and the upper part completely detached, the gleba fully exposed. Endoperidium fragile, bluish-gray when fresh, ash-gray to bluish-gray when dry. Gleba pale brown to olive-yellow when mature, cottony.

Hyphal structure: Exoperidium composed of chains of colorless hyphae, ellipsoid, oblong, pyriform, occasionally globose to subglobose, sphaecysts, thin-walled, smooth, colorless in 5 % KOH, (16 –) 20–33 (– 35) × 10–15 µm. Endoperidium composed of undulate, colorless hyphae, thick-walled, occasionally branched, 2.5–3.5 µm in diameter. Capillitium of Calvatia - type, rare branched, septate, thick-walled, 2.5–3.6 µm in diameter. Paracapillitium absent.

Basidiospores: Globose to subglobose, 2.8–3.5 (– 3.8) × 2.7–3.3 (– 3.7) μm, honey-yellow, thick-walled, CB –, spinose (less than 1 µm), with a short pedicel (less than 0.5 µm), Q = 1.01–1.02, Q m = 1.02 ± 0.02, n = 60 / 2.

Additional specimen examined (paratype).

China • Yunnan Province, Zhaotong, Yiliang County, Wumengshan National Nature Reserve , 27°47'19.69"N, 104°15'4.78"E, elev. 2300 m, on the ground, 20 September 2023, CLZhao 33366 ( SWFC) .

Figures

Figure 4. Calvatia phlebioides (CLZhao 33216) A, B basidiomes of C. phlebioides C, D exoperidial elements E endoperidial hyphae F, G capillitial H basidiospores I basidiospores by SEM.

Figure 5. Calvatia phlebioides (CLZhao 33216) A basidiospores B capillitial C exoperidial elements D endoperidial hyphae. Scale bars: 1 µm (A); 10 µm (B – D).