Traits name details
original description
(of ) Nelson, E. T. (1870). On the molluscan fauna of the later Tertiary of Peru. <em>Transactions of the Connecticut Academy of Arts and Science.</em> 2: 186-206, pls 6-7., available online at https://www.biodiversitylibrary.org/page/7502942 page(s): 201 [details]
basis of record
Spieker, E. M. (1922). The paleontology of the Zorritos Formation of the north Peruvian oil fields. <em>The Johns Hopkins University, Studies in Geology.</em> 3: 1-197, pls. 1-10., available online at https://www.biodiversitylibrary.org/page/19066928 page(s): 165, pl. 10, fig. 8-9 [details]
additional source
Olsson, A. A. (1932). Contributions to the Tertiary paleontology of northern Peru: Part 5, the Peruvian Miocene. <em>Bulletins of American Paleontology.</em> 19(68): 1-272, 24 pls., available online at https://www.biodiversitylibrary.org/page/32532232 page(s): 130, pl. 14, fig. 6 [details]
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