original description(ofCymbium productum R. T. Lowe, 1861)Lowe, R. T. (1861). A list of shells observed or collected at Mogador and in its immediate environs, during a few days' visit to the place, in April 1859. <em>i>Journal of the Proceedings of the Linnean Society.</em> 5: 169-204., available online athttps://www.biodiversitylibrary.org/page/8580687 page(s): 191 [details]