MolluscaBase taxon details
original description
Pilsbry, H. A. (1930). Anatomy and relationships of some American Helicidae and Polygyridae. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 82: 303-327, plate 23-27.
page(s): 319 [details] Available for editors [request]
basis of record
Bank, R. A. (2017). Classification of the Recent terrestrial Gastropoda of the World. Last update: July 16th, 2017. [details]
additional source
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): 90 [details]