original description
Cooper, J.G. (1894). Catalogue of Californian Fossils (parts II, III, IV, and V). <em>California State Mining Bureau Bulletin.</em> 4: 1-65, 6 pls.
page(s): 54-55, pl. 5, fig. 57 [details]
basis of record
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313.
page(s): 248 [details] Available for editors [request]
additional source
Cooper, J.G. (1894). On some Pliocene fresh water fossils of California. <em>Proceedings of the California Academy of Sciences, second series.</em> 4: 166-172., available online at https://www.biodiversitylibrary.org/page/16063639
page(s): 169, pl. 14, fig. 9 [details]
From editor or global species database
Type locality "Along the westerly branch of San Pablo Creek, on the stage road just south of Rocky Mound", California, USA [details]