Traits name details
original description
Gabb, W. M. (1860). Descriptions of new species of American Tertiary and Cretaceous fossils. <em>Journal of the Academy of Sciences of Philadelphia, Second Series.</em> 4: 375-404, pls. 67-69., available online at https://biodiversitylibrary.org/page/36862263 page(s): 377, pl. 67, fig. 16 [details]
additional source
Harris, G. D. (1895). New and otherwise interesting Tertiary Mollusca from Texas. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 47: 45-88, 9 pls., available online at https://www.biodiversitylibrary.org/page/26323100 page(s): 75, pl. 8, fig. 6 [details]
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