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Pilsbry, H. A. (1931). The Miocene and Recent Mollusca of Panama Bay. Proceedings of the Academy of Natural Sciences of Philadelphia. 83: 427–440, pl. 41.
Pilsbry, H. A. (1931). The Miocene and Recent Mollusca of Panama Bay. Proceedings of the Academy of Natural Sciences of Philadelphia. 83: 427–440, pl. 41.
