Tectus dentatus, common name the toothed top shell, is a species of sea snail, marine gastropod mollusk in the family Tegulidae.

The large, imperforate shell is conical-turreted shape, solid and heavy, The surface shows strong rounded protuberances and it is whitish or pale brown, while the base has a blue-green color with pearly sheen.

The base of the shell is flat, smooth, partly polished, with an appearance of obsolete concentric lirae about.

the central portion, white, or with a zone of blue or of green or both colors surrounding the axial tract.

The meat of this sea snail is appreciated as food and the shell is valued of commercial importance in manufacture of buttons and souvenirs.