Traits name details
original description
White, C.A. (1886). On the relation of the Laramie molluscan fauna to that of the succeeding fresh-water Eocene and other groups. <em>United States Geological Survey Bulletin.</em> 34: 391-442. page(s): 409, pl. 4, fig. 1, pl. 5, figs 1, 2 [details] 
status source
Henderson, J. (1918). The nomenclature and systematic positions of some North American fossil and recent mollusks. <em>The Nautilus.</em> 32(2): 60-64., available online at https://biodiversitylibrary.org/page/1772069 page(s): 60 [details]
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