Lindtneria terrestris F. Wu & Q.X. Guan, 2025

Lindtneria terrestris F. Wu & Q.X. Guan , sp. nov. Figs. 2 View FIGURE 2 , 3 View FIGURE 3

MycoBank no.: 858193

Diagnosis: Differs from other species of Lindtneria by irregular pores, buff-yellow to light-yellow pore surface, and globose to subglobose, yellowish to yellow, thin-walled basidiospores.

Typification: CHINA. Anhui Province: Yuexi County, Laibang Town, ground, 4 July 2024, F. Wu (leg.), Wu 2058 (BJFC 046366).

Etymology: terrestris (Lat.) refers to the holotype’s habitat, “on the ground.”

Basidiomata: Annual, resupinate, effused, soft, easily separated from the substrate, without odor or taste when fresh, brittle when dry, up to 4 cm long, 2 cm wide, and 1.5 mm thick at the center. Hymenophore poroid, buff-yellow (4A4) to pale yellow (3A4) when fresh, becoming orange-yellow (4A8) to curry-yellow (4B8) upon drying; margin thinning out, concolorous with hymenium; pores irregular, about 2 per mm; dissepiments thin, lacerate. Subiculum very thin, up to 0.2 mm thick; tubes concolorous with pore surface, brittle when dry, up to 1.3 mm long.

Hyphal system: Monomitic; generative hyphae septate with or without clamp connections, yellowish, IKI−, moderately CB+; tissues unchanged in KOH. Subiculum hyphae hyaline to yellowish, thin- to slightly thick-walled, frequently branched, loosely interwoven, sometimes inflated in septa, 2.5–10 µm in diam. Generative hyphae in tubes hyaline to yellowish, thin- to slightly thick-walled, moderately branched, interwoven, 2.7–5 µm in diam.

Hymenium: Cystidia and cystidioles absent. Basidia cylindrical to subclavate, with four sterigmata and a basal clamp connection, sometimes with a simple septum, frequently with cyanophilous globules, 26–36 × 11–13.5 µm; basidioles mostly capitate, smaller than basidia.

Spores: Basidiospores globose to subglobose, yellowish to yellow, thin-walled, with irregularly arranged conical spines up to 1.8 µm, with irregular substance inside, IKI–, CB–, 7–8 × (6.7–)6.8–7.7(–7.9) µm, L = 7.47 µm, W = 7.21 µm, Q = 1.02–1.05 (n = 60/2).

Additional specimen examined ( paratype): CHINA. Anhui Province: Yuexi County, Laibang Town, ground, 4 July 2024, F. Wu (leg.), Wu 2059 (BJFC 046367).