original description
Suzuki, K. (1941). Notes on the Tertiary non-marine Mollusca from the coal-field of Uryu, Hokkaido. <em>Journal of the Faculty of Science, University of Tokyo, Sec. II.</em> 6: 13-37.
page(s): 25, pl. 1, fig. 11a-c [details] Available for editors [request]
basis of record
Mizuno, A. (1964). Summary of the Paleogene molluscan faunas in North Japan. <em>Geological Survey of Japan, Reports.</em> 207: 1-28. [details] Available for editors [request]
additional source
Oyama, K., Mizuno, A. & Sakamoto, T. (1960) Illustrated Handbook of Japanese Paleogene Molluscs. Geological Survey of Japan, Tokyo, 244 pp., 71 pls.
page(s): 133-134, pl. 37, fig. 5a-c [details]
From editor or global species database
Type locality "In the Tomisawa, a branch of the Nasu-zawa which in turn is a branch of the Urasima-gawa" (Hokkaido, Japan) [details]