original description
Mayer, C. (1869). Mollusca. In: Heer, O. (Ed.) Flora Fossilis Alaskana. Fossile Flora von Alaska. <em>Kungliga Svenska Vetenskaps-Akademiens Handlingar.</em> 8 (4): 40-41., available online at https://www.biodiversitylibrary.org/page/7463194
page(s): 40, pl. 10, fig. 7 [details]
From editor or global species database
Type locality "Neniltschik" [= Cape Ninilchik, Alaska], USA; Clamgulchian, late Miocene-Pliocene [details]