original description
Lea, I. (1841). On fresh water and land shells (continuation) [fifty-seven new species]. <em>Proceedings of the American Philosophical Society.</em> 2(17): 30-34 [7 May 1841]., available online at http://biodiversitylibrary.org/page/34521454
page(s): 33 [details]
From editor or global species database
Type locality USA, Oregon (without a precise location) [details]