MolluscaBase taxon details
basis of record
Shikama T. (1962). On some noteworthy shells from off Chôshi, Chiba Prefecture. <em>Science Reports of the Yokohama National University, section II (Geology).</em> 8: 29-56, pls 1-3., available online at http://hdl.handle.net/10131/2923
page(s): 38, pl. 1 figs 3a-b [details]