MolluscaBase name details
original description
Cooper, J. G. (1893). On land and fresh water Mollusca of lower California. No. 3. <em>Proceedings of the California Academy of Sciences.</em> (2) 3: 338-344, plates 8-9 ["1892"]., available online at https://www.biodiversitylibrary.org/page/16073779
page(s): 341–342; pl. 14, fig. 8 [details]