Diancta dextra, Neubert, Eike & Bouchet, Philippe, 2015

Neubert, Eike & Bouchet, Philippe, 2015, The Diplommatinidae of Fiji - a hotspot of Pacific land snail biodiversity (Caenogastropoda, Cyclophoroidea), ZooKeys 487, pp. 1-85 : 14

Taxon classification Animalia Mesogastropoda Diplommatinidae

Diancta dextra sp. n. Figs 27-28

Type material.

Holotype MNHN IM-2000-27422. Type locality: Viti Levu, Wailotua karst, 50-80 m, rainforest, -17.7582 178.4166, leg. Bouchet, 25-27.08.1998.

Material.

Viti Levu, Saweni karst, 50-60 m, dry forest, -17.9032 177.7983, leg. Bouchet, 22.08.1998, MNHN/1.

Etymology.

Latin adjective dexter, dextra, -um = right.

Diagnosis.

Shell dextral, quite large, reddish, regularly spaced fine ribs, columellar plate reduced, with a palatalis.

Description.

Shell dextral, broadly oval, quite large, reddish; last whorl constricted; protoconch broad, obtuse; umbilicus slit-like, concave periomphalum; teleoconch sculpture of regularly spaced fine ribs, ribs slightly coarser on the last whorl; last whorl strongly ascending; aperture subrectangular, peristome funnel-shaped, simple; aperture connected to the last whorl; no visible pleats in the aperture; inside the shell, columellar plate reduced to an almost invisible callus, one palatalis present.

Operculum not recorded.

Measurements.

Holotype (Fig. 27): H = 3.56; D = 2.9; PH = 1.74; PD = 1.73; W = 5.5.

Distribution

(Fig. 170). Two localities in central and eastern Viti Levu.

Remarks.

Diancta dextra sp. n. differs from the similar Diancta controversa sp. n. by the more coarse pattern of ribbing, the reduced columellar plate, and the missing palatalis. The two species co-occur in the Wailotua karst.