Taxon classification Animalia Pulmonata Plectopylidae

Endothyrella angulata Budha & Pall-Gergely sp. n. Figures 9 I–J, 14B

Type material.

Nepal, Taubas, Bhainse, Makwanpur District, 27°492521'N, 85°04839'E., leg. Budha, P., 30.03.2012., holotype (CDZMTU018, Figure 14B); 3 paratypes and 2 juvenile shells (not paratypes) (CDZMTU019).

Diagnosis.

Shell small, sinisttral, with flat dorsal surface and shouldered (keeled) body whorl; hairs are arranged in four rows; parietal lamella simple with a short free horizontal plica below it, and two denticles posterior to the lamella which are in contact with the lamella; middle palatal plicae divided.

Description .

Shell sinistral, semi-transparent; protoconch elevated from the flat dorsal surface; colour brownish or greyish; protoconch conspicuously large, consists of 2.5, 2.75 whorls, very finely, regularly ribbed; teleoconch with clearly visible reticulated sculpture dominated by radial growth lines; sculpture somewhat weaker on the ventral surface; very slender, long periostracal folds (hairs) standing in four spiral lines along the body whorl; two closely adjacent rows running with the keel above, one row on the ventral side around the umbilicus, and one row approximately in the middle line of the body whorl; whorls 6.25 (holotype) moderately bulging, separated by relatively deep suture; umbilicus wide and deep; peristome thin, slightly reflexed; callus moderate; no fold in the aperture.

One specimen was opened. Palatal wall with a single, straight lamella, with two short denticles on the posterior side of the lamella, both are in contact with the lamella; a short, free horizontal plica is visible under the lamella; palatal wall with six plicae, first straight, last slightly curved, the middle plicae are divided in the middle, the fragments are horizontal, oblique or Z-shaped (Figure 9 I–J).

Measurements

(in mm): D: 8.5, H: 3.5 (holotype); D: 5.5, H: 2.5, Wh: 5 (paratype; subadult specimen).

Differential diagnosis.

See under Endothyrella dolakhaensis sp. n., Endothyrella minor, Endothyrella nepalica sp. n., Endothyrella pinacis and Table 5.

Etymology.

The Latin angulatus (cornered, angular) refers to the shouldered/angulated body whorl of the new species.

Type locality.

Nepal, Taubas, Bhainse, Makwanpur District, 27°492521'N, 85°04839'E.

Distribution.

Endothyrella angulata sp. n. is known only from the type locality (Figure 15).