Meek, F. B. & Hayden, F. V. (1860). On a new genus of patelliform shells from the Cretaceous rocks of Nebraska. <em>American Journal of Science and Arts.</em> (2) 24: 33-34.[details]
original descriptionMeek, F. B. & Hayden, F. V. (1860). On a new genus of patelliform shells from the Cretaceous rocks of Nebraska. <em>American Journal of Science and Arts.</em> (2) 24: 33-34.[details]
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