original description
Hannibal, H. (1912). A synopsis of the recent and Tertiary freshwater Mollusca of the Californian province, based upon an ontogenetic classification. <em>Proceedings of the Malacological Society of London.</em> 10(2): 112-166, pls 5-6; 10(3): 167-211, pls 7-8., available online at http://biodiversitylibrary.org/page/15237075
page(s): 121, pl. 7, fig. 17 [details]
From editor or global species database
Type locality "One-fourth mile above Carnegie Pottery plant, in cut along Western Pacific Railway, Corral Hollow, Tesla, California", USA; Tejon Fm., Eocene [details]