Family Marginellidae

Shell size to 14 Shell elongate for genus, surface smooth. Spire about 1/5 shell length. Suture distinct. Aperture narrower posteriorly, outer lip bent in middle. Columella with four folds. Color amber to light yellow. The shell in the main image is from Sanibel, supplementary images represent shells from Tampa Bay.

Shell small, elongate for genus. Surface smooth. Spire about 1/7 shell length. Suture distinct. Aperture narrower posteriorly, outer lip bent in middle. Columella with four folds. Color cream to whitish. This is a much smaller shell than locally occurring Prunum succineum; this latter also differs by having a much wider aperture anteriorly (toward the bottom of the pictures.) This is a rare find for Sanibel Island; the shell in the main illustration was collected by Ken Piech in early 2014 on the island. This may actually represent a separate species (compare with more typical specimen from the Florida Keys in the supplementary illustration.)

Shell size to 10 mm; shell pear-shaped. Surface highly polished. Body whorl comprising most of shell. Aperture narrow. Outer lip thickened, usually with two small brown spots. Columella with four folds. Color golden, orange, orange-brown, greenish-gray, or grayish. Very common in seagrass beds. The pictures of the live animals were taken by (on left) Amy Tripp on Goodland, Collier County and (on right) by Lorin Buckner at Bunche Beach, in Fort Myers.

Shell size to 10 mm; shell with pointed spire, aperture slightly more than ½ shell length. Outer lip thick, with about 7-9 denticles on inner surface, most apical delimiting an embayment on apical ("top") end of outer lip. Columella with 4 well-defined plicae. Color tan to light-tan.

Shell size to 4 mm; shell with pointed spire, aperture about ½ shell length. Outer lip thick, with about 4 denticles on inner surface. Columella with 4 plicae. Color translucent-white, with two well-defined, narrow, golden-orange spiral bands on last whorl, one on preceding whorls.