Architectonica perdix, common name the partridge sundial, is a species of sea snail, a marine gastropod mollusc in the family Architectonicidae, the sundials.

Architectonica perdix has a shell that reaches 65–83 mm in maximum dimension.

The basic shell color is cream, with brown spots.

This species can be found in Madagascar, Tanzania, southeastern India, Sri Lanka, northern China, Australia and the central Pacific Ocean area.

Architectonica perdix lives on sandy bottoms, at depths of 10–60 m.