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
Burch, J. B. (1989). <i>North American freshwater snails</i>. Malacological Publications, Hamburg, Michigan. pp. i-viii, 1-365.
page(s): 180, fig. 624 [details]