Angustopila psammion Pall-Gergely, Anker & Vermeulen, 2022

Fig. 7

Angustopila psammion Páll-Gergely, Anker & Vermeulen, in Páll-Gergely et al. 2022: 69, fig. 3.

Type locality.

"Vietnam, Quang Ninh Province, Halong Bay, Cap La Cave, 20°51'47.61"N 107°13'32.46"E, soil deposit fallen through roof in pristine cave, vegetation outside cave tall and woody, J.J. Vermeulen & K. Anker leg., 07.03.2018, JJV 17633."

Diagnosis.

A small Angustopila species with a depressed-globular shell with dome-shaped spire, thick spiral striae, kidney-shaped aperture with single parietal denticle not reaching parietal callus.

Measurements (in mm).

H = 0.46-0.57, D = 0.6-0.68, H/D*100: 75.7-88.5 (n = 24), RUD = 27.7-28.1 (n = 2).

Differential diagnosis.

See under A. cicatricosa sp. nov. and A. maasseni sp. nov.

Distribution.

This species is known only from its type locality (Fig. 24).

Remarks.

Currently the smallest known land snail globally ( Páll-Gergely et al. 2022).