MolluscaBase name details
original description
(of Radix ampla f. utahensis Call, 1884) Call, R.E. (1884). On the Quaternary and Recent Mollusca of the Great Basin, with descriptions of new forms. <em>Bulletin of the United States Geological Survey.</em> 11: 358–421., available online at https://pubs.usgs.gov/bul/0011/report.pdf
page(s): 373 [details]
basis of record
Baker, F. C. (1911). The Lymnaeidae of North and Middle America, recent and fossil. <em>The Chicago Academy of Sciences, special publication.</em> 3: 1-539., available online at https://www.biodiversitylibrary.org/page/18164581
page(s): 458, pl. 22, figs. 9-11; pl. 24, figs. 22-27 [details]