MolluscaBase name details
original description
Pilsbry, H. A. & Ferriss, J. H. (1906). Mollusca of the Southwestern States. II. <em>Proceedings of the Academy of natural Sciences of Philadelphia.</em> 58: 123-160 [20 June 1906], 161-175, pls 5-9 [24 July 1906]., available online at https://www.biodiversitylibrary.org/page/24706972
page(s): 172, pl. 9: figs 7–9 [details]