Vanikoro acuta (Recluz, 1844). (Synonyms: Vanikoro semiplicata Pease, 1861b; V. kanakanarum Pilsbry, 1921, V. helicoidea (Le Guillou, 1842), Cernohorsky, 1972, in part.) Length, 7 mm; diameter, 6 mm. Shell: globose, thin, fragile; last whorl spirally striated, apical whorls microscopically punctate; white. Spire: protoconch of two and one-half whorls, the apical whorls smooth, the abapical whorl with six to eight microscopically granular spirals; teleoconch of three or four globose whorls, the last whorl much the largest; suture indistinct. Sculpture: apical whorl with fine axial ribs between which are spiral striae producing a punctate effect, axial ribs becoming less noticeable on the subsequent whorls although the punctate effect remains apparent; last whorl finely striate. Aperture: subovate; columella shieldlike and straight; umbilicus deep and splaying out at the base, ridged with approximately ten keels; umbilical ridge finely crenulate, a groove separating it from the last whorl in juvenile specimens. Color: white.
Specimens are occasionally found beneath rocks in shallow waters; beachworn shells are numerous in drift.
This species was described from and is widely distributed through the Indo-West Pacific and has been recorded from the Moluccas and Lord Hood Island (Smith, 1908) and the Tuamotus (Dautzenberg and Bouge, 1933, as V. semiplicata).