Traits taxon details
original description
Myers, R. L. (1968). Biostratigraphy of the Cardenas Formation (Upper Cretaceous) San Luis Potosi, Mexico. <em>Paleontología Mexicana.</em> 24: 9-39, pls. 1-16. page(s): 59-60, pl. 9, figs 6-8 [details] Available for editors
additional source
Perrilliat, M.d.C.; Vega, F.J.; Corona, R. (2000). Early Maastrichtian Mollusca from the Mexcala Formation of the State of Guerrero, Southern Mexico. <em>Journal of Paleontology.</em> 74(1): 7-24., available online at https://doi.org/10.1017/S0022336000031206 page(s): 20 [details] Available for editors
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