Bellaspira pentagonalis is a species of sea snail in the family Drilliidae.

The whorls are whitish and the summits of the five ribs are brownish.

The ribs are continuous from base to summit and the cross-section of the shell forms an exact pentagon with rounded angles.

The other characters are closely similar to Fenimorea pagodula.

[4] This marine species occurs from North Carolina (Cape Hatteras) to Florida, and in the Gulf of Mexico off Western Florida and in the Caribbean Sea off Aruba and French Guiana.