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
Sterki, V. (1909). <i>Sphaerium pilsbryanum</i>, n. sp. <em>The Nautilus.</em> 22(12): 141-142., available online at http://biodiversitylibrary.org/page/27049236 [details]
additional source
Henderson, J. (1931). Variation in <i>Carinifex newberryi</i> (Lea) and <i>Lymnaea utahensis</i> (Call). <em>The Nautilus.</em> 44(3): 77-79, pl. 6., available online at https://www.biodiversitylibrary.org/page/8514935
page(s): 78-79, pl. 6, figs. 6, 7 [details]