Polystira sunderlandi is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids.

[1] Original description: "Shell small for genus, fusiform, elongate, with high, elevated spire; 6 raised, bladelike, spiral cords on body whorl; spire whorls with 3 cords: cords all equally-spaced and equal-sized; siphonal canal long, straight, with numerous small spiral cords and spiral threads; anal notch narrow, deep, aligned with second cord; shell color light brown with single narrow white band that corresponds to second cord from suture; siphonal canal tan with dark brown anterior tip; interior of aperture tan.

"[2] Locus typicus: "(Dredged from) 150 metres depth 50 kilometres South of Apalachicola, Florida, USA.

"[3] This marine species occurs in the North Atlantic Ocean off Florida at a depth of 150 m.

This Turridae-related article is a stub.