Taxon classification Animalia Mesogastropoda Diplommatinidae

Diancta aurita sp. n. Figs 16-17

Type material.

Holotype MNHN IM-2000-27414, paratypes MNHN/4 IM-2000-27415, NMBE 516868/1. Type locality: Viti Levu, Wailotua karst, near summit Uluitova, 370-390 m, rainforest, -17.7582 178.4166, leg. Bouchet, 28.08.1998.

Etymology.

Latin adjective auritus, -a, -um = with long ears.

Diagnosis.

Large, sinistral shell, yellowish, aperture with an extraordinarily enlarged process over the left edge, aperture orange red.

Description.

Shell large, sinistral, elongate oval, yellowish; last whorl slightly constricted; protoconch large, bulbous obtuse, pitted; umbilicus closed, narrow concave periomphalum; teleoconch sculpture of widely spaced ribs on the initial whorls, turning to a more densely spaced pattern on the central whorls, and becoming slightly coarser on the last third of the last whorl; last whorl slightly ascending; aperture circular, orange red, peristome doubled, not connected to the last whorl; apertural rims connected; aperture with an extraordinarily enlarged process over the left edge; no pleats visible in the aperture; inside the shell columellar plate with a reduced inner part, and a broad outer part.

Operculum corneous, flat, internally with a small lamella.

Measurements.

Holotype (Fig. 16): H = 4.39; D = 2.7; PH = 1.78; PD = 1.79; W = 6.

Distribution

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

Remarks.

For a differential diagnosis, refer to Diancta aurea sp. n. There was no complete operculum available for an illustration or proper measurement.