Traits name details
original description
Hanna, G. D. (1963). Some Pleistocene and Pliocene freshwater Mollusca from California and Oregon. <em>California Academy of Sciences, Occasional Papers.</em> 43: 1-20., available online at https://www.biodiversitylibrary.org/page/3163478 page(s): 15, pl. 3, figs 1-3, 6 [details]
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