original description
(of Venericardia (Cyclocardia) laxata Yokoyama, 1924 †) Yokoyama M. (1924). Molluscan remains from the lowest part of the Jo-ban coal-field. <em>Journal of the College of Science, Imperial University of Tokyo.</em> 45(3): 1–22, pls 1–5.
page(s): 19, pl. 3, figs. 16-18 [details]
basis of record
Kafanov, A.; Ogasawara, K. & Marincovich Jr, L. (2001). Checklist and bibliography of the Cenozoic marine Bivalvia (Mollusca) of northeastern Asia (Russian Far East), 1968-1999. Mizunami Fossil Museum, Bulletin. 28: 1-138. [details] Available for editors [request]
From editor or global species database
Fossil range Oligocene [details]