Traits name details
original description
Van Winkle, K. E. H. (1918). Paleontology of the Oligocene of the Chehalis Valley, Washington. <em>University of Washington Publications in Geology.</em> 1(2): 67-97, pls. 6, 7., available online at https://www.biodiversitylibrary.org/page/19066884 page(s): 84, pl. 7, fig. 15 [details]
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