original description
Russell, L.S. (1931). Mollusca from the Upper Cretaceous and Lower Tertiary of Alberta. <em>Transactions of the Royal Society of Canada, third series. Section IV - Geological Sciences.</em> 25: 9-19.
page(s): 11-12, pl. 1, figs 5-8 [details] Available for editors [request]
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): 115 [details] Available for editors [request]
basis of record
Russell, L.S. (1974). Fauna and Correlation of the Ravenscrag Formation (Paleocene) of Southwestern Saskatchewan. <em>Royal Ontario Museum and University of Toronto, Life Sciences, Contributions.</em> 102: 1-53., available online at https://archive.org/details/faunacorrelation00russ [details] Available for editors [request]
additional source
Hartman, J.H. (1998). The biostratigraphy and paleontology of latest Cretaceous and Paleocene freshwater bivalves from the western Williston Basin, Montana, U.S.A. In: Johnston, P.A. & Haggart, J.W. Bivalves: an eon of evolution. Calgary, University of Calgary Press, 317-345.
page(s): 337 [details] Available for editors [request]
From editor or global species database
Type locality "From legal subdivision 11, section 32, township 20, range 28, west of 4th meridian, on east side of Highwood river, just below mouth of Sheep river. Lower portion of Paskapoo formation", Alberta, Canada; Paleocene [details]