original description
Dall, W. H. (1919). Descriptions of new species of Mollusca from the North Pacific Ocean in the collection of the United States National Museum. <em>Proceedings of the United States National Museum.</em> 56 (2295): 293-371., available online at http://biodiversitylibrary.org/page/7766313
page(s): 323 [details]
additional source
Dall, W. H. (1925). Illustrations of unfigured types of shells in the collections of the United States National Museum. <em>Proceedings of the United States National Museum.</em> 66, art. 17, no. 2554: 1-41, pls. 1-36., available online at https://www.biodiversitylibrary.org/page/7738736
page(s): 10, pl. 6 fig. 3 [details]
subsequent type designation
Oldroyd, I. S. (1927). The marine shells of the west coast of North America. <em>Stanford University Publications in Geological Sciences.</em> Volume 2, part 1, pp. 1-298, 29 pls., available online at https://www.biodiversitylibrary.org/page/58081753
note: lectotype designation [details]
From editor or global species database