Campanella albomarginata C. L. Zhao sp. nov.

Figs 6, 7, 8

Etymology.

albomarginata (Lat.): referring to the white margin of the type specimen.

Diagnosis.

It is characterized by resupinate, coriaceous basidiomata with white to cream hymenial surface, a monomitic hyphal system with clamped generative hyphae, thin-walled, and drop-shaped basidiospores (9.5–12 × 5–7.5 µm).

Holotype.

China, Yunnan Province, Dehong, Ruili, Tongbiguan Provincial Nature Reserve, 24°01'N, 97°83'E, altitude 1000 m asl., on the fallen angiosperm branch, leg. C. L. Zhao, 23 September 2024, CLZhao 42114 (SWFC 00042114).

Basidiomata.

Annual, resupinate, coriaceous, without odor or taste when fresh, up to 8 cm long, 1.5 cm wide, up to 200 µm thick. Hymenial surface smooth, white when fresh, turning to cream upon drying. Sterile margin white, thinning out up to 0.5 mm wide.

Hyphal system.

Monomitic; generative hyphae with clamp connections, colorless, thin-walled, branched, interwoven, 2–3 µm in diameter; IKI –, CB –; tissues unchanged in KOH. Cystidia capitate, colorless, thin-walled, 29–40 × 6–11 µm; Basidia subcylindrical, slightly constricted, with four sterigmata and a basal clamp connection, 30–47 × 6–10 µm, basidioles dominant, in shape similar to basidia, but slightly smaller. Basidiospores drop-shaped, colorless, thin-walled, smooth, with a few guttulae, IKI –, CB –, (9 –) 9.5–12 (– 12.5) × (4.5 –) 5–7.5 (– 8) µm, L = 10.92 µm, W = 6.25 µm, Q = 1.40–2.30 (n = 60 / 2).

Material examined specimen

(paratype). China • Yunnan Province, Dehong, Ruili, Tongbiguan Provincial Nature Reserve, 24°01'N, 97°83'E, altitude 1000 m asl., on the fallen angiosperm branch, leg. C. L. Zhao, 23 September 2024, CLZhao 48992 (SWFC 00048992).