Traits name details
original description
Meek, F. B. (1871). Preliminary paleontological report consisting of lists of fossils, with descriptions of some new types, etc. <em>United States Geological and Geographical Survey of the Territories, annual report.</em> 4: 287-318., available online at https://www.biodiversitylibrary.org/page/30326788 page(s): 303 [details]
additional source
Watters, G. T. (2001). The evolution of the Unionacea in North America, and its implications for the worldwide fauna. <em>In: Bauer, G.; Wächtler, K. (eds) Ecology and evolution of the freshwater mussels Unionoida. Springer, Berlin, Heidelberg.</em> pp. 281-307. page(s): 288 [details] Available for editors 
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