original description
Rowell, J. (1902). A new <i>Helix</i> from California. <em>The Nautilus.</em> 16(5): 52., available online at https://www.biodiversitylibrary.org/page/1754325
page(s): 52 [details]
basis of record
InvertEBase. (2018). Authority files of U.S. and Canadian land and freshwater mollusks developed for the InvertEBase (InvertEBase.org) project.
page(s): 52 [details]
From editor or global species database
Type locality On a high, dry ridge, in the town of "Occidental," on our "Cal. North Western R. R." Sonoma County, California [details]