original description
Henderson, J. (1934). Some new Mesozoic Mollusca from the Rocky Mountain region and Arizona. <em>Journal of Paleontology.</em> 8(3): 259-263.
page(s): 262, pl. 36, figs 3a-d [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): 222 [details] Available for editors [request]
From editor or global species database
Type locality A mile or two east of Fosston, Weld County, Colorado, United States; Laramie Formation, Maastrichtian, late Cretaceous [details]