original description
(of Radix ampla var. 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): 401, pl. 6, figs. 7-9 [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
Johnson, P. D.; Bogan, A. E.; Brown, K. M.; Burkhead, N. M.; Cordeiro, J. R.; Garner, J. T.; Hartfield, P. D.; Lepitzki, D. A. W.; Mackie, G. L.; Tarpley, T. A.; Tiemann, J. S.; Whelan, N. V.; Strong, E. E. (2013). Conservation status of freshwater gastropods of Canada and the United States. <em>Fisheries.</em> 38(6): 247-282., available online at http://www.tandfonline.com/doi/abs/10.1080/03632415.2013.785396 [details] Available for editors [request]
From editor or global species database
Type locality USA, Utah, Lake Utah, Lehi [details]