original description
Conrad, T. A. (1874). Remarks on the Tertiary clay of the Upper Amazon with descriptions of new shells. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 1874: 25-32., available online at https://www.biodiversitylibrary.org/page/26361848
page(s): 31, pl. 1, fig. 7 [details]
From editor or global species database
Type locality Conrad (1874) listed a few localities on the Upper Amazon in Peru on p. 26, but it's unclear from which of these localities the species derives from. [details]