MolluscaBase taxon details
original description
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): 159 [details]
additional source
Squires, R. L. (2014). Fossil record of the Ficid gastropods <i>Urosyca</i>, <i>Priscoficus</i>, and <i>Ficus</i> from coastal-western North America: Phylogenetic and global paleobiogeographic implications. <em>Contributions in Science.</em> 522: 1-27., available online at https://www.biodiversitylibrary.org/page/52303329
page(s): 5-6 [details]