original description
Bland, T. (1875). Notes on the sub-generic character of <em>Helix jamaicensis</em>, Chemn., and on certain terrestrial mollusks from Haiti; with description of a new species of <em>Helix</em> from Colorado. <em>Annals of The Lyceum of Natural History of New York.</em> 11(1): 146-154., available online at https://doi.org/10.1111/j.1749-6632.1876.tb00072.x
page(s): 151-152, 3 unnummbered text-figures [details]
additional source
Binney, W. G. (1875). On the genitalia, jaw and lingual dentition of certain species of Pulmonata (with a note on the classification on the Achatinellae, by Thomas Bland). <em>Annals of the Lyceum of Natural History of New York.</em> 11: 166-196 plates 12-18., available online at https://www.biodiversitylibrary.org/page/16076264#page/188/mode/1up
page(s): 171-172, pl. 12, fig. E; pl. 18, fig. C [details]
From editor or global species database
Type locality Colorado [details]