Quasimitra lacunosa is a species of sea snail, a marine gastropod mollusk in the family Mitridae, the miters or miter snails.

[1] (Described as Mitra mauritiana) This shell resembles Reeve's Mitra lacunosa, but it is regularly cancellated by pitted grooves and ridges.

The form is cylindrical, with shouldered, straight-sided whorls.

The lip of the aperture is slightly crenulated.

This Mitridae-related article is a stub.