Tenaturris trilineata is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

It shows small, close, numerous longitudinal ribs and impressed revolving striae.

Its color is whitish, with three narrow brown bands, one of which appears on the spire whorls.

[2] T. trilineata can be found in Atlantic and Caribbean waters, ranging from the Campeche Bank to Colombia and the Virgin Islands.

;[3] in the Caribbean Sea, the Gulf of Mexico and the Lesser Antilles.