original description
Conrad, T. A. (1842). Observations on a portion of the Atlantic Tertiary region, with a description of new species of organic remains. <em>Bulletin of the Proceedings of the National Institute for the Promotion of Science.</em> 2: 171–194, pls. 1-2., available online at https://www.biodiversitylibrary.org/page/57828834
page(s): 193, pl. 2, fig. 1 [details]
additional source
Abbott, R. T. (1955). The Titian R. Peale Shell Collection. <em>The Nautilus.</em> 68(4): 123-127, pl. 4, figs. 1-6., available online at https://www.biodiversitylibrary.org/page/8516606
page(s): 125 [details]
From editor or global species database
Type locality Calvert Cliffs, Captain Hance's farm [details]