original description
Conrad, T. A. (1855). Description of the fossil shells. In: United States. War Department (1853-1856). <em>Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean.</em> 5: 317-328., available online at https://www.biodiversitylibrary.org/page/32408649
page(s): 328, pl. 6, fig. 55 [details]
From editor or global species database
Type locality Isthmus of Darien [details]