MolluscaBase name details
original description
Pilsbry, H. A. & Vanatta, E. G. (1907). Description of a new <i>Bifidaria</i> (<i>B. agna</i>). <em>The Nautilus.</em> 20(12): 140-142, text-figures 1-3., available online at https://www.biodiversitylibrary.org/page/1757681 [details]
basis of record
InvertEBase. (2018). Authority files of U.S. and Canadian land and freshwater mollusks developed for the InvertEBase (InvertEBase.org) project. [details]
From editor or global species database
Type locality Trinidad, Colorado [details]
From editor or global species database