original description
(of Lithasia antiqua Gabb, 1866 †) Gabb, W. M. (1866-1869). Geological Survey of California. Palaeontology. Volume II. Cretaceous and Tertiary fossils. <em>Palaeontology. Volume II.</em> 1-38, pls. 1-13 [Feb 1866]; 39-299, pls. 14-36 [1869?]; i-xiv [1869]., available online at https://www.biodiversitylibrary.org/page/2066671
page(s): 13, pl. 2, fig. 22 [details]
basis of record
Yen, T.-C. (1944). Notes on Fresh-Water Mollusks of Idaho Formation at Hammett, Idaho. <em>Journal of Paleontology.</em> 18(1): 101-108.
page(s): 105 [details] Available for editors [request]
additional source
Hershler, R. (1994). A review of the North American freshwater snail genus <i>Pyrgulopsis</i> (Hydrobiidae). <em>Smithsonian Contributions to Zoology.</em> 554: 1-115., available online at https://repository.si.edu/handle/10088/5139
page(s): 85 [details] Available for editors [request]
source of synonymy
Taylor, D. W. (1966). Summary of North American Blancan nonmarine mollusks. <em>Malacologia.</em> 4(1): 1-172, pls 1−8., available online at https://www.biodiversitylibrary.org/page/13147234
page(s): 76 [details]
status source
Hershler, R. & Frest, T. J. (1996). A review of the North American freshwater snail genus <i>Fluminicola</i> (Hydrobiidae). <em>Smithsonian Contributions to Zoology.</em> 583: 1-41., available online at https://repository.si.edu/handle/10088/5527
page(s): 8 [details]
From editor or global species database
Synonymy Synonymized with Natica occidentalis Hall, 1845 by Taylor (1966: 76). The combination with Pilsbryus is retained (see Hershler & Frest 1996: 8). [details]