Tryon, G. W. (1863). Description of two new species of fresh water Mollusca, from Panama. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 15: 146., available online athttps://www.biodiversitylibrary.org/page/1958410 page(s): 146; pl. 1, fig. 6 [details]
original descriptionTryon, G. W. (1863). Description of two new species of fresh water Mollusca, from Panama. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 15: 146., available online athttps://www.biodiversitylibrary.org/page/1958410 page(s): 146; pl. 1, fig. 6 [details]
additional sourceTate, R. (1870). On the land and fresh-water Mollusca of Nicaragua. <em>American Journal of Conchology.</em> 5(3): 151-162, pl. 16., available online athttps://www.biodiversitylibrary.org/page/7005208 page(s): 153 [details]