additional sourcePilsbry, H. A. (1922). Revision of W. M. Gabb's Tertiary Mollusca of Santo Domingo. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 73(2): 305-435, pls 16-47., available online athttps://www.biodiversitylibrary.org/page/26276713 page(s): 384; plate 34, fig. 6 [details]