original description
Newcomb, W. (1865). Description of a new species of <i>Helix</i>. <em>American Journal of Conchology.</em> 1(3): 235, pl. 25, fig. 4., available online at https://www.biodiversitylibrary.org/page/16084762 [details]
basis of record
InvertEBase. (2018). Authority files of U.S. and Canadian land and freshwater mollusks developed for the InvertEBase (InvertEBase.org) project. [details]
From editor or global species database
Type locality "Canyon Creek, Trinity County, California" [details]