MolluscaBase name details
original description
Gabb, W. M. (1864). Description of the Cretaceous fossils. <em>In: Meek, F. B. and Gabb, W. M. Geological Survey of California, Palaeontology of California.</em> 1: 55-243, pls. 9-32., available online at https://biodiversitylibrary.org/page/2062749
page(s): 201, pl. 26, fig. 188 [details]
additional source
Stanton, T.W. (1895). Contributions to the Cretaceous paleontology of the Pacific coast: the fauna of the Knoxville beds. <em>Bulletin of the United States Geological Survey.</em> 133: 1-132.
page(s): 37 [details]