original description
McLearn, F.H. (1926). New species from the Coloradoan of Lower Smokey and Lower Peace Rivers, Alberta. <em>Contributions To Canadian Paleontology; Geological Survey of Canada, Museum Bulletin.</em> 42: 117-126., available online at http://ftp.maps.canada.ca/pub/nrcan_rncan/publications/ess_sst/293/293661/mb_042.pdf
page(s): 125, pl. 23, figs 1-2 [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): 112 [details] Available for editors [request]
From editor or global species database
Type locality "In landslide talus of Dunvegan sandstone, west bank Peace river, 5 miles below mouth of Montagneuse river", Alberta, Canada; Dunvegan Fm., Cenomanian, Early Cretaceous [details]