The following diagnosis is based on specimens from Singapore and additional information in Houbrick (1987). Shell thick and solid, tall and narrow, typically decollate in adults, to 30 mm in shell height; whorls weakly inflated, each sculptured with about 8-10 incised spiral lines, suture impressed; body whorl large, moderately inflated, periphery angulate, sculptured with numerous spiral lines, profile of base moderately concave and constricted towards siphonal canal; aperture ovate, about one-third of shell height; outer lip smooth, siphonal canal short, columella concave, with a thickened prominent parietal plait that extends into the aperture. Shell tan to dark brownish-grey, usually with faint whitish blotches and irregular dark streaks; periostracum thick, tan; inside of aperture purple-brown, edges and columella whitish.

This species belonging to a monotypic genus is easily recognised by its strong shell with a typically truncated apex. It has thus far been found only on the rocky shores of the southern islands of Singapore. This species appears to be rare locally with no confirmed records reported in the past decade.

Habitat. — High intertidal zone of rocky habitats; found at bases and crevices of large rocks and boulders on exposed rocky shores, and under rubble and debris in the upper littoral zone of more protected areas, clustering in moist areas during low tide and generally away from bright light (Houbrick, 1987).