Traits name details
original description
Branson, C. C. (1930). Paleontology and stratigraphy of the Phosphoria Formation. <em>The University of Missouri Studies: A Quarterly of Research.</em> 5: 1-99. page(s): 47, pl. 13, figs 2-7 [details]
basis of record
Newell, N. D.; Boyd, D. W. (1975). Parallel evolution in early trigoniacean bivalves. <em>Bulletin of the American Museum of Natural History.</em> 154(2): 53–162. page(s): 128 [details] Available for editors 
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