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): 36-37, pl. 1, fig. 7, pl. 2, figs 1, 2, 4 [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): 120 [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): 117, 132 [details]
From editor or global species database
Type locality CAS loc. 417, in Haggin Creek, about 200 feet below bridge, one mile southeast of Penn Grove, Santa Rosa Quadrangle, Sonoma County, California, USA; late Hemphillian, late Miocene to earliest Pliocene [details]