Brown, A. P. & Pilsbry, H. A. (1913). Fauna of the Gatun Formation, Isthmus of Panama - II. Proceedings of the Academy of Natural Sciences of Philadelphia. 64: 500–519, pls. 22–26.
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Brown, A. P. & Pilsbry, H. A.
1913
Fauna of the Gatun Formation, Isthmus of Panama - II
Proceedings of the Academy of Natural Sciences of Philadelphia