original description(of)Mansfield, W. C. (1925). Miocene gastropods and scaphopods from Trinidad, British West Indies. <em>Proceedings of the United States National Museum.</em> 66(2559): 1-65, pls. 1-10., available online athttps://repository.si.edu/bitstream/handle/10088/15365/USNMP-66_2559_1925.pdf page(s): 20-21, pl. 2, figs. 3-4 [details]