original descriptionCarpenter, P. P. (1861). Lectures on Mollusca; or “shell-fish” and their allies. <em>Annual Report of the Board of Regents of the Smithsonian Institution for 1860.</em> 151−283., available online athttps://books.google.es/books?id=sdEMAAAAYAAJ&pg=RA1-PA254[details]