original description
Weaver, C. E.; Palmer, K. V. W. (1922). Fauna from the Eocene of Washington. <em>University of Washington Publications in Geology.</em> 1(3): 1-56, pls 8-12., available online at https://www.biodiversitylibrary.org/page/17201643
page(s): 37-38, pl. 9, figs. 18, 20 [details]
From editor or global species database
Type locality at Joice Station, one-fourth mile east of Tongue Point Railroad, Port Crescent, Clallam County, Section 22, Township 31 North, Range 8 West [details]