basis of recordYen, T.-C. (1946). On Lower Cretaceous Fresh-Water Mollusks of Sage Creek, Wyoming. <em>Notulae Naturae of The Academy of Natural Sciences of Philadelphia.</em> 166: 1-13. page(s): 7, figs 4a-f [details] Available for editors [request]
Present Inaccurate Introduced: alien Containing type locality