Family Calliostomatidae

Shell size to 10 mm; shell with relatively low spire. Sculpture of spiral cordlets, 10-12 spiral on last whorl, 3-4 on periphery, 10 on base. Umbilicus deep. Color light brownish- or yellowish-cream, with large flamules of darker color.

Shell size to 25 mm; shell turbinate, with sharp spire and indistinct suture. Sculpture of fine spiral cords. Color red-brown with gray and white streaks. Photo of the live animal was taken by Amy Tripp at Kice Island, Collier County, in January 2011. The additional images show a Tampa Bay Top Snail adhering to a tank wall; notice the shape of the foot, tentacles, epipodial tentacles (projecting away from the foot), and the mouth with jaws (yellow) and radula (white).

Shell size to 18 mm; shell turbinate, spire angle smaller than most Calliostoma. Whorls flat-sided to concave, shoulder well-defined, giving stepped aspect to spire. Whorls covered with finely beaded spiral lines. Color tan, mottled with reddish brown spots and irregular grayish streaks. Base of lighter color than spire, umbilicus lacking, central area of base whitish. Shell in the main image collected by Ken Piech on January 5, 2020 on Shell Island, to the south of Kice Island, Collier County, Florida. The specimen on the supplementary image has a narrower spire angle, and could belong to a separate species. Main photos by James F. Kelly.

Shell size to 18 mm; shell turbinate, spire angle about 65 degrees. Whorls stepped, shoulder well-defined, giving stepped aspect to spire. Whorls covered with six finely beaded spiral lines that alternate with narrower lines. Color tan, vaguely mottled with white. Protoconch darker. Umbilicus lacking, center of base whitish. The supplementary image (darker shell) is of a specimen with an unusual whorl architecture and opened umbilicus (alterations probably caused by a predator-inflicted wound to the mantle edge) that imparts a "deep suture" look to the shell. This latter shell belongs to and was collected in January 2015 by Bruce Carabelli in Kice Island, Collier County.