Traits name details
original description
Hall, J. (1845). Descriptions of organic remains collected by Captain J. C. Frémont, in the geographical survey of Oregon and North Californa. In: Frémont, J.C. Report of the exploring expedition to the Rocky Mountains in the year 1842, and to Oregon and North California. Gales and Seaton, Washington, pp. 304-310., available online at https://www.biodiversitylibrary.org/page/32560211 page(s): 309, pl. 3, fig. 9 [details]
basis of record
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313. page(s): 203 [details] Available for editors 
status source
Taylor, D. W. (1966). Summary of North American Blancan nonmarine mollusks. <em>Malacologia.</em> 4(1): 1-172, pls 1−8., available online at https://www.biodiversitylibrary.org/page/13147234 page(s): 76 [details]
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