Taxon classification Animalia Mesogastropoda Diplommatinidae

Palaina truncata sp. n. Figs 116-117

Type material.

Holotype MNHN IM-2000-27465, paratypes MNHN/4 IM-2000-27466. - Viti Levu, surroundings of Nandele village, 50 m, secondary agroforest with Albizia and coffee shrubs, -17.7083 177.5249, leg. Bouchet, Warén & Dayrat, 17.03.1999.

Etymology.

Latin adjective, past participle of verb truncare = to truncate.

Diagnosis.

Shell sinistral, small, bulb well developed with strong bulb lamella, columella obliquely twisted, truncate, basal tooth-like callus, one parietalis

Description.

Shell sinistral, small, oval, whitish to greyish; protoconch acute granulated; last whorl not constricted, slightly ascending; bulb well developed; umbilicus closed, periomphalum narrow; sculpture of teleoconch whorls with widely spaced ribs; aperture circular, simple, adhered to the last whorl; oblique view into the aperture revealing a strong columellaris; internally, columella obliquely twisted, truncate in the lower third with a basal tooth-like callus, parietum with a small parietalis in front of the bulb and a parietal furrow or depression next to the columella; a strong bulb lamella present.

Operculum unknown.

Measurements.

Holotype (Fig. 116): H = 3.29; D = 1.63; PH = 1.12; PD = 1.23; W = 6.5.

Distribution

(Fig. 170). Only known from the type locality.

Remarks.

Palaina truncata sp. n. is close to Palaina tuberosissima sp. n., but this species has a large parietalis, a lamella in the bulb, and a deep palatalis. It is also similar to Palaina subregularis, but differs from it in having the twisted columella, a parietalis and a bulb.