original description
Cockerell, T. D. A. (1915). New species of <i>Unio</i> from the Tertiary rocks of Wyoming. <em>Bulletin of the American Museum of Natural History.</em> 34(4): 121-126., available online at http://digitallibrary.amnh.org/handle/2246/1766
page(s): 123-124, textfig. 2 [details]
basis of record
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313.
page(s): 92 [details] Available for editors [request]
From editor or global species database
Type locality "Head of Big Sand Coulee", Wyoming, USA; Clarkforkian, late Thanetian, Paleocene [details]