original descriptionDüben, M.W. von; Koren, J. (1846). Öfversigt af Skandinaviens Echinodermer [Overview of Scandinavian Echinodermata]. <em>Kungl. Svenska Vetenskapsakademiens Handlingar 1844.</em> 229-328, plates VI-XI., available online athttp://babel.hathitrust.org/cgi/pt?id=mdp.39015039478022;view=1up;seq=235 page(s): 247 [details]