Architectonica perdix
Architectonica perdix, common name the partridge sundial, is a species of sea snail, a marine gastropod mollusc in the family Architectonicidae, the sundials.
Description
The thin shell is conoidal, smooth, and pale. The whorls are somewhat swollen and are divided superiorly by a single girdle. The whorls of the spire are minutely fold-striated. The shell is angled and three-keeled at the periphery, where the middle keel is prominent, larger, and crenate-bearing. The girdle and the keels are adorned with reddish-brown, sub-quadrate spots. The umbilicus is wide-open and is encircled by small white crenules.Architectonica perdix has a shell that reaches 65–83 mm in maximum dimension. This shell is low-spired and quite flattened, with a beaded surface. It has seven flatly convex whorls and the base of shell is slight convex in the centre. The sutures are finely incised. The basic shell color is cream, with brown spots.