original description
Hanna, G. D. (1923). Upper Miocene lacustrine mollusks from Sonoma County, California. <em>Proceedings of the California Academy of Sciences, fourth series.</em> 12(3): 31-41., available online at https://www.biodiversitylibrary.org/page/15974899
page(s): 38, pl. 2, fig. 6 [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): 237 [details] Available for editors [request]
source of synonymy
Taylor, D. W. (1966). Summary of North American Blancan nonmarine mollusks. <em>Malacologia.</em> 4(1): 1-172, pls 1−8., available online at https://www.biodiversitylibrary.org/page/13147234
page(s): 133 [details]
From editor or global species database
Type locality In Haggin Creek, about 200 feet below bridge, one mile southeast of Penn Grove, Santa Rosa Quadrangle, Sonoma County, California, United States; late Hemphillian, late Miocene to earliest Pliocene [details]