original description(ofPotamilla Malmgren, 1866)Malmgren, Anders Johan. (1866? vol for 1865). Nordiska Hafs-Annulater. [part three of three]. <em>Öfversigt af Königlich Vetenskapsakademiens förhandlingar, Stockholm.</em> 22(5): 355-410, plates XVIII-XXIX., available online athttps://biodiversitylibrary.org/page/32339631 page(s): 401 [details]