MolluscaBase name details
original description
Call, R. E. & Pilsbry, H. A. (1886). On <i>Pyrgulopsis</i>, a new genus of rissoid mollusk, with descriptions of two new forms. <em>Proceedings of the Davenport Academy of Natural Sciences.</em> 5: 9-14, pl. 2., available online at https://www.biodiversitylibrary.org/page/14051068
page(s): 14, pl. 2 figs 17-19 [details]