Turridrupa pertinax Hedley, 1922 (original combination Microdrillia pertinax is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.

Its colour is pale buff, darker on the base and the columella.

Sculpture :—On the body whorl there is a prominent keel on the shoulder, followed anteriorly by seven evenly spaced and gradually diminishing spirals.

Above the keel is a broad fasciole, crossed by fine crescentic riblets and bounded by a small spiral.

[2] This marine species occurs off the Philippines and Queensland, Australia.