Traits name details
original description
(of Cassis nuperus Conrad, 1833 †) Conrad, T. A. (1832-1833). Fossil shells of the Tertiary formations of North America, illustrated by figures drawn on stone from nature. Philadelphia: Judah Dobson, W. P. Gibbons, Printer. Vol. 1(1): pp. [i]-viii + 9-20, pls 1-6 [1832]; Vol. 1(2): pp. 21-28, pls 7-14 [December 1832]; Vol. 1(3): pp. 29-38, no plates [August 1833]; Vol. 1(4): pp. 39-46, pls 15-20. , available online at https://www.biodiversitylibrary.org/page/23521363 page(s): 46 [details]
basis of record
Garvie, C. L. (2025). New gastropods from the Eocene (Claibornian) of the U. S. Gulf Coastal Plain with a review of several other poorly known gastropod taxa. <em>Bulletins of American Paleontology.</em> 413: 1-143., available online at https://doi.org/10.32857/bap.2025.413.01 page(s): 30 [details] Available for editors 
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