Tenaturris dysoni, common name Dyson's mangelia, is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

(Original description) The ovate shell has a rather short spire.

The whorls are rounded at the upper part, longitudinally very closely finely ribbed, decussated with transverse striae.

The color of the shell is whitish, encircled with two faint bands of orange brown.

[2] This species occurs in the Caribbean Sea off Honduras, Colombia and in the Lesser Antilles.