Derives from the original describers Fisher & MacGinitie use of 'caupo', Latin for innkeeper
Cole, T. C. H. (2017). Wörterbuch der Wirbellosen / Dictionary of Invertebrates. Latein-Deutsch-English. <em>2017.</em> Springer Spektrum: Berlin. ISBN 978-3-662-52869-3. XII, 574 pp. (look up in IMIS)
Fisher, W. K., MacGinitie, G. E. (1928). A new echiuroid worm from California. <em>Annals and Magazine of Natural History (Series 10).</em> 1(2): 199–204, plate IX.available online athttp://www.tandfonline.com/doi/abs/10.1080/00222932808672764