Tectus is a genus of sea snails, marine gastropod mollusks in the family Tegulidae.

The rhomboidal aperture is very oblique, angular, and wider than long.

The columella is very short, vertical, with a strong spiral fold, ending anteriorly in a knob or point.

[3] This marine genus has a wide distribution.

It occurs in the Persian Gulf, the Red Sea, in the Central and East Indian Ocean and off East Africa, Oceania, Indo-China, Indo-Malaysia, the Philippines, East India, Australia (New South Wales, Northern Territory, Queensland, Western Australia), Kermadec Islands, New Caledonia, Anadaman Islands.