Mansfieldella robbiae
"Shell small, squat, reaching a maximum height of about 8 mm and diameter about 4.5 mm, oval in outline, solid. Shell spire low, about one fifth total height, apex rounded with a small pointed tip visible in less strongly callused specimens. Protoconch, spire whorls, and sutures obscured by callus. Deep groove-like suture between body whorl and spire. Body whorl sub-cylindrical, antero-posteriorly flattened, contracted in zone of fasciolar band. Parietal callus strong, thickest opposite apical end of aperture and from there spreading upwards to tip of apex. Pillar structure a raised plate or shelf carrying a strong fold below, rotating outward, with a sharp tooth at apical end. Between these three to six smaller lirations of variable strength. Outer lip not thickened, internally with long lirations opposite those of the pillar structure. Surface smooth and polished.". Pleistocene. Bermont Formation. Palm Beach Rock Company quarry, north side of U.S Highway 441, three miles west of Loxahatchee, Palm Beach County, Florida.
