Traits name details
original description
(of ) Bland, T. (1859). Remarks on certain species of North American Helicidae. <em>Annals of the Lyceum of Natural History of New York.</em> 7: 26-39., available online at https://www.biodiversitylibrary.org/page/16227460 page(s): 35, fig. 4 [details]
basis of record
Emberton, K. C. (1995). When shells do not tell: 145 million years of evolution in North America's polygyrid land snails, with a revision and conservation priorities. <em>Malacologia.</em> 37(1): 69-110. Ann Arbor., available online at https://www.biodiversitylibrary.org/page/13113494 page(s): 92 [details]
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