Hesperisternia multangulus, the ribbed cantharus, is a species of sea snail in the family Pisaniidae.

[1][2] The ribbed cantharus was first formally named by Rodolfo Amando Philippi in 1848 as Fusus multangulus.

[3] The type locality is from the Yucatán Peninsula.

[1] The length of the shell attains 24.1 mm.

This species occurs off Yucatan, Mexico in the Caribbean Sea.