basis of recordHenderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313. page(s): 121 [details] Available for editors [request]
status sourceRussell, L.S. (1964). Cretaceous Non-marine Faunas of Northwestern North America. <em>Royal Ontario Museum and University of Toronto, Life Sciences, Contributions.</em> 61: 1-24., available online athttps://www.biodiversitylibrary.org/page/36250220[details] Available for editors [request]
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