original description
Vanatta, E. G. (1924). Descriptions of four new American shells. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 76: 25–27.
page(s): 25-26 [details] Available for editors [request]
additional source
Vanatta, E. G. (1925). On the type locality of <i>Polygyra townsendiana brunnea</i>. <em>The Nautilus.</em> 38(4): 144., available online at https://www.biodiversitylibrary.org/page/8525125 [details]
From editor or global species database
Type locality "At Coal Creek, a small branch of Cowlitz River, which flows into the Columbia River about ten miles south of Kelso, Cowlitz County, Washington." [details]