The Gold-line Marginella, Dentimargo aureocinctus (Stearns, 1872), is a close relative of the locally more conspicuous, the Common Atlantic Marginella, Prunum apicinum (Menke, 1828). Both are members of the family Marginellidae, noted for the thick outer lip on the shell of their species. The shell of the Gold-line Marginella, however, differs from the latter species by its smaller size (about 4 mm, or 0.16 inch) and by having a more elongated spire and a single golden-yellow spiral band set against a whitish background.
The Gold-line Marginella, Dentimargo aureocinctus, from Sanibel. Photo by José H. Leal.