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  • José H. Leal

Shell of the Week: The Orange-rib Drillia

Bellaspira pentagonalis (Dall, 1889) is a local, small member of the family Drilliidae that reaches only about 4 mm (0.16 inch). The shell is spindle-shaped, with a smooth, semi-glossy surface and about 6–7 rounded axial ribs. The aperture spans about 1/3 of the shell length. Color is pure-white, with large yellowish-brown spots.

The Orange-rib Drillia, Bellaspira pentagonalis, from Sanibel. Photo by José H. Leal.


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