Priotrochus obscurus

The very solid, thick, narrowly perforated shell has a conical shape and is elevated.

The sutures are slightly impressed, the whorl below them closely appressed.

The body whorl shows a coronal series of knobs, on large specimens becoming obsolete toward the aperture.

The entire surface is traversed by spiral lirulae, much narrower than the densely obliquely striate interstices.

[3] This species is distributed in the Red Sea and in the Indian Ocean off Madagascar, Mozambique, Tanzania and Durban, South Africa.