Angustopila occidentalis Pall-Gergely & Hunyadi, 2023

Figs 3, 13D

Angustopila occidentalis Páll-Gergely & Hunyadi in Páll-Gergely et al. 2023: 118-122, figs 70-72. Type locality: Shan State, ca 6 km east from Hsihseng centre.

Material examined.

Parpant area, Taunggyi City, Shan State, Myanmar (locality code: Sh8) 20°15'3.7"N, 97°14'23.9"E; 1159 m a.s.l.: CUMZ 14389 (1 shell; Fig. 3A, B), CUMZ 14390 (7 shells; Fig. 3C, D) .

Distribution.

This species is known from several localities in Shan State, Myanmar ( Páll-Gergely et al. 2023).

Remarks.

Angustopila occidentalis is uniquely recognised by a minute conical shell and whorls that are slightly shouldered and rounded on the periphery. The protoconch is uniquely radially striated (Fig. 3A, B), while all congeners known so far lack radial striation at this early developmental stage. Apertural dentition with one large parietal lamella.

In Myanmar, this species is widely distributed. The individuals examined herein were also collected from the limestone wall inside Parpant Cave, Shan State. These specimens agree well with the type specimen of this species (Fig. 13D) in having a medium-sized, low conical shell, one strong parietal lamella and lacking a palatal tooth.