original descriptionSay, T. (1817). Descriptions of seven species of American fresh water and land shells, not noticed in the systems. <em>Journal of the Academy of Natural Sciences.</em> Philadelphia 1(1): 13–16, 17–18., available online athttp://archive.org/stream/journalofacademy01acaduoft#page/n21/mode/2up page(s): 13 [details]