Shell of the Week: The Four-ribbed Lucine

Pleurolucina leucocyma reaches 7 mm (about 0.28 inch) in length. Its shell is unusually shaped (like a "warped triangle”) and bears 3 or 4 thick radial ribs crossed by fine commarginal (“concentric”) lines. The color is cream to off-white. The species is found off North Carolina, both coasts of Florida, Gulf of Mexico, and the Bahamas. 

Pleurolucina leucocyma from off Dry Tortugas, Florida. Illustration by Patricia A. Starkey for the Museum's Digital Imaging Project.

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