Bailya parva is a small but attractive gastropod that reaches only 20 mm (about 0.8 inch). Its shell sculpture presents 10–12 axial (“vertical”) ribs crossed by spiral lines, with beads forming at the intersections. The shell color is yellowish- to mahogany-brown with broad white bands. The species is found off Florida, Gulf of Mexico, and the Caribbean Sea. This species may be difficult to distinguish from the Intricate Phos (Bailya intricata), a species with similar distribution; this latter, however, seems to have a larger number of axial ribs (14–36) and uniform color.
José H. Leal
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