original description
Arnold, R. (1909). Paleontology of the Coalinga district, Fresno and Kings counties, California. <em>United States Geological Survey Bulletin.</em> 396: 1-173.
page(s): 96, pl. 30, figs 3a-3b [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): 257 [details] Available for editors [request]
From editor or global species database
Type locality USGS locality 4732, Kettleman Hills, North Dome, ca. 2 miles from NW end, Fresno County, California, United States; Tulare Formation, Pleistocene [details]