original description
Binney, W.G. (1865). Land and fresh-water shells of North America. Part II. Pulmonata, Limnophila, and Thalassophila. <em>Smithsonian Miscellaneous Collections.</em> 143: 1-161., available online at https://www.biodiversitylibrary.org/page/8817149
page(s): 79 [details]
additional source
Elrod, M. J. (1902). Collecting shells in Montana. <em>The Nautilus.</em> 15(9): 103-104; 15(10): 110-112; 15(11): 129-130., available online at https://www.biodiversitylibrary.org/page/1738492
page(s): 112 [details]
additional source
Henderson, J. (1936). <i>Physa ampullacea</i> Gould, <i>Physa nuttallii</i> Lea and <i>Physa columbiana</i> Hemphill. <em>The Nautilus.</em> 49(3): 85-87., available online at https://www.biodiversitylibrary.org/page/8527720 [details]
source of synonymy
Taylor, D. W. (2003). Introduction to Physidae (Gastropoda: Hygrophila); biogeography, classification, morphology. <em>Revista de Biología Tropical.</em> 51(Suppl. 1): 1-263 (includes a Catalog of species, pp. 197-263)., available online at https://tropicalstudies.org/rbt/attachments/suppls/sup51-1%20Physidae/Physidae%20Information.pdf
page(s): 210 [details]
From editor or global species database
Nomenclature A substitute name for P. bullata A. Gould, 1855, not of Potiez & Michaud, 1838 [details]