original description
Heilprin, A. (1891). The Eocene Mollusca of the state of Texas. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 42: 393-406., available online at https://www.biodiversitylibrary.org/page/26357529
page(s): 404, pl. 11, fig. 2 [details]
additional source
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313.
page(s): 230 [details] Available for editors [request]
From editor or global species database
Type locality "Station 5, Rio Grande" (Texas, USA) [details]