original description
Glen, W. (1960). Pliocene Fresh-Water Gastropods from San Mateo County, California <em>Journal of Paleontology</em>. 34(6): 1207-1209
page(s): 1209, text-figs 1A-1D [details]
From editor or global species database
Type locality Sykline Blvd., 300 yards NW of entrance to quarry operated by Skyline Materials Plant No. 1, San Mateo County, California, United States; Santa Clara Formation, early Pleistocene [details]