original description(ofBittium oldroydae Bartsch, 1911)Bartsch, P. (1911). The Recent and fossil mollusks of the genus <i>Bittium</i> from the west coast of America. <em>Proceedings of the United States National Museum.</em> 40 (1826): 383-414, pls 51-58., available online athttps://www.biodiversitylibrary.org/page/15845645 page(s): 408, pl 51, fig. 5 [details]