Traits name details
original description
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): 41, pl. 1, fig. 6 [details]
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